General Scienc - A STEP TOWARDS...

2017

General Scienc

N E W B A T C H S T A R T S : D U M D U M

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Railway Exam Oriented General Science

Set 1:- 1. Bromine is–

(A) colourless gas insoluble in water (B) A highly inflammable gas

(C) A Black solid. (D) A red liquid. (Ans : D)

2. The metal used in storage batteries–

(A) Iron (B) Copper

(C) Lead (D) Zinc (Ans : C)

3. Water has maximum density at–

(A) -4°C (B) 0°C

(C) 4°C (D) 100°C (Ans : C)

4. The colour of Emerald is–

(A) Violet (B) Yellow

(C) Deep Green (D) Prussian Blue (Ans : C)

5. Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of–

(A) Nitrates (B) Zeolites

(C) Sulphonates (D) None of these (Ans : B)

6. Rust is–

(A) A mixture of Fe2O3 and Fe(OH)2 (B) A mixture of FeO and Fe(OH)2

(C) FeO only (D) A mixture of Fe2O3, 3H2O and FeO (Ans : D)

7. Which of the following characters is not shown by hydrogen–

(A) It burns in air to form water (B) It supports combustion

(C) It combines with almost all metals forming hydrides (D) It readily combines with fluorine and chlorine

(Ans : B)

8. Which of the following elements is obtained from sea weeds ?

(A) Argon (B) Sulphur

(C) Vanadium (D) Iodine (Ans : D)

9. The metallic constituents of hard water are–

(A) Magnesium, Calcium and tin (B) Iron, tin and calcium

(C) Calcium, magnesium and iron (D) Magnesium, tin and iron (Ans : C)

10. The location and energy of an electron in an atom can be specified by–

(A) Atomic mass (B) Atomic number

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(C) Quantum numbers (D) None of these (Ans : C)

11. Old-written material, which cannot be read easily can be read by–

(A) Cosmic Rays (B) Ultraviolet rays

(C) Infra Red rays (D) None of these (Ans : C)

12. In an atomic nucleus, neutrons and protons are held together by–

(A) Gravitational forces (B) Magnetic forces

(C) Exchange forces (D) Coulombic forces (Ans : C)

13. The type of glass used in making prisms and lenses is–

(A) Soft glass (B) Pyrex glass

(C) Jena glass (D) Flint glass (Ans : D)

14. Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous

glass called–

(A) Carbon Monoxide (B) Phosphine

(C) Phosgene (D) None of these (Ans : D)

15. Which of the following is commonly called a polyamide ?

(A) Rayon (B) Orion

(C) Terylene (D) Nylon (Ans : D)

16. Hydrometer is an instrument–

(A) For measuring sound in water (B) To detect the presence of hydrogen in the atmosphere

(C) For measuring the specific gravity of liquids (D) To detect the changes in atmospheric humidity (Ans : C)

17. Which thermometer is used to indicate the lowest temperature ?

(A) Clinical thermometer (B) Gas thermometer

(C) Alcohol thermometer (D) Resistance thermometer (Ans : C)

18. A chronometer measures–

(A) Sound waves (B) Time

(C) Water waves (D) Colour contrast (Ans : B)

19. If temperature is kept constant during the reaction the process is called–

(A) Adiabatic (B) Isobaric

(C) Isochoric (D) Isothermal (Ans : D)

20. Cholera is caused by–

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(A) vibrio cholerae (B) salmonella

(C) bacterioceoccurs (D) None of these(Ans : A)

21. Why do colloidal substance do not deposited below ?

(A) Specific gravity is less (B) It is of very less amount in respect of solvent

(C) They carry electrical charges (D) They are converted to sovent (Ans : A)

22. Which of the following gases is obtained by the reaction of water with calcium carbide–

(A) Acetylene (B) Ethylene

(C) Methane (D) Water gas (Ans : A)

23. Cooking oil can be converted into vegetable ghee by the process of–

(A) oxidation (B) hydrogenation

(C) distillation (D) crystalisation (Ans : B)

24. The contact process is involved in the manufacture of–

(A) nitric acid (B) Sulphuric acid

(C) Ammonia (D) Caustic soda (Ans : B)

25. Antidiuretic hormone (ADH)–

(A) inhibits the secretion of growth hormone by the pituitary

(B) inhibits the rate of heart beat

(C) causes the muscular walls of the arterioles to contract that simulates the reabsorption of water from the

kidney tubules.

(D) causes an increase in the blood pressure (Ans : C)

Set 2:-

1. Which of the following metals forms an amalgum with other metals ?

(A) Lead (B) Tin

(C) Zinc (D) Mercury (Ans : D)

2. Which of the following is not an ore of Aluminium?

(A) Felsper (B) Bauxite

(C) Cryolite (D) Azurite (Ans : D)

3. Most soluble in water is–

(A) Camphor (B) Sugar

(C) Sulphur (D) Common Salt (Ans : B)

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4. Which of the following is used as lubricant ?

(A) Graphite (B) Silica

(C) Diamond (D) Iron Oxide (Ans : A)

5. The purest form of iron is–

(A) Steel (B) Pig iron

(C) Cast iron (D) Wrought iron (Ans : D)

6. The percentage of carbon is the least in–

(A) Grey cast iron (B) Wrought iron

(C) White cast iron (D) Steel (Ans : D)

7. An element that does not occur in nature but can be produced artificially is —

(A) Thorium (B) Radium

(C) Plutonium (D) Uranium (Ans : C)

8. The inert gas which is substituted for nitrogen in the air, used by deep sea drivers for breathing is–

(A) Helium (B) Argon

(C) Krypton (D) Xenon (Ans : A)

9. The group of metals Fe, Co, Ni may be best called as–

(A) Alkali metals (B) Rare metals

(C) Main group metals (D) Transition metals (Ans : D)

10. Who suggested that the most of the mass of atom is located in nucleus ?

(A) Bohr (B) Thomson

(C) Rutherford (D) Avogadro (Ans : C)

11. Meson particles are found in–

(A) R-rays (B) X-rays

(C) Laser beam (D) Cosmic rays (Ans : D)

12. An atom of an element with mass number 23 and atomic number 11 will have–

(A) 11 neutrons, 12 protons and 11 electrons (B) 11 protons, 12 neutrons and 11 electrons

(C) 11 protons, 12 electrons and 11 neutrons (D) 23 protons and 11 electrons (Ans : B)

13. Which of the following is a protein ?

(A) Wool (B) Starch

(C) Natural rubber (D) Cellulose (Ans : C)

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14. Soap is a mixture of sodium or potassium salts of—

(A) Monocarboxylic acid (B) Glycerols

(C) Dicarboxylic acid (D) Tricarboxylic acid (Ans : A)

15. Which of the following material is used to prepare blue-black ink ?

(A) Gallic acid (B) Tannic acid

(C) Ferrous sulphate (D) All of these (Ans : D)

16. Water gas is prepared by passing–

(A) Steam over white hot coke (B) Air over red hot coke

(C) Methane over red hot coke (D) Steam over heated sulphur (Ans : A)

17. Which of the following metals react with nitrogen to form nitride ?

(A) Sodium (B) Potassium

(C) Magnesium (D) None of these (Ans : C)

18. One micron is equal to–

(A) 1/10th of mm (B) 1/100th of mm

(C) 1/1000th of mm (D) 1/10000th of mm (Ans : C)

19. Equal volumes of different gases at any definite temperature and pressure have–

(A) Equal weights (B) equal masses

(C) equal density (D) equal no. of molecules (Ans : D)

20. Milk is an example of–

(A) suspension (B) true solution

(C) emulsion (D) gel (Ans : C)

21. Which of the following modes of expressing concentration is independent of temperature–

(A) Molarity (B) Molality

(C) Normality (D) Formality (Ans : B)

22. Which of the following substances undergoes chemical change on heating ?

(A) Sodium chloride (B) Silica

(C) Lead nitrate (D) Platinum wire (Ans : C)

23. Vulcanisation is a–

(A) Science of studying volcanoes

(B) method of degrade polymers

(C) Process connected with the making of voltaic cells

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(D) Process of hardening of rubber by heating it with sulphur. (Ans : D)


(A) steam over white-hot coke (B) air over red-hot coke

(C) methane over red-hot coke (D) steam over heated sulphur (Ans : A)

25. The hormone which stimulates milk production in mammal is known as–

(A) Glucagon (B) prolactin

(C) progesterone (D) oestrogen (Ans : B)

Set 3:-

1. An alloy used in making heating elements for electric heating devices is–

(A) Solder (B) Alloysteel

(C) Nichrome (D) German Silver (Ans : C)

2. German Silver is an alloy of–

(A) Copper, Silver and Nickel (B) Silver, Copper and Aluminium

(C) Zinc, Copper and Nickel (D) Silver, Zinc and Nickel (Ans : C)

3. Air is a/an–

(A) Compound (B) Element

(C) Mixture (D) Electrolyte (Ans : C)

4. Which of the following substance is a bad conductor of electricity but a good conductor of heat?

(A) Asbestos (B) Celluloid

(C) Purspecks (D) Mica (Ans : D)

5. Carborandum is–

(A) Silicon Dioxide (B) Silicon Carbide

(C) Silicon Nitride (D) Silicon Phosphide (Ans : B)

6. Which of the following is the best conductor of electricity ?

(A) Copper (B) Mica

(C) Zinc (D) Silver (Ans : D)

7. Soda water contains–

(A) Nitrous acid (B) Carbonic acid

(C) Carbon dioxide (D) Sulphuric acid (Ans : C)

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8. Which of the following is basis of the modern periodic table ?

(A) Atomic mass (B) Atomic number

(C) Atomic size (D) Atomic volume (Ans : B)

9. Of the following metals, which one pollutes the air of a big city ?

(A) Copper (B) Cadmium

(C) Lead (D) Chromium (Ans : C)

10. Bell Metal is an alloy of–

(A) Brass and Nickel (B) Zinc and Copper

(C) Tin and Copper (D) Nickel and Copper (Ans : C)

11. The high temperature superconductors are–

(A) Metal alloys (B) Ceramic oxides

(C) Inorganic polymers (D) Pure rare earth metals (Ans : B)

12. The ingredients of Gun metal are–

(A) Iron, tin (B) Copper, tin

(C) Iron, brass, tin (D) Iron, zinc, titanium (Ans : B)

. The neutral atom s two isotopes differ in the number of–

(A) Electron shells (B) Protons

(C) Valence electrons (D) Neutrons (Ans : D)

14. Optical fibres are mainly used in–

(A) Communication (B) Weaving

(C) Musical Instruments (D) Food Industry (Ans : A)

15. The first synthetic fibre made by man was–

(A) Rayon (B) Nylon

(C) Polyester (D) Terycott (Ans : B)

16. Polythene is industrially prepared by the polymerization of–

(A) Methane (B) Styrene

(C) Acetylene (D) Ethylene (Ans : D)

17. A mixture of water and alcohol can be separated by–

(A) Filtration (B) Evaporation

(C) Distillation (D) Decantation (Ans : C)

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18. A substance which changes readily into vapour without heating is called–

(A) Efflorescent (B) Synthetic

(C) Volatile (D) Effervescent (Ans : C)

19. German biochemist, Emil Fischer–

(A) gave Operon model (B) compared the fit between enzyme substrate to lock and key

(C) proposed the theory of competitive inhibition (D) proposed the feed back inhibition theory (Ans : B)

20. Enzymes generally have–

(A) same pH and temperature optima (B) same pH but different temperature optima

(C) different pH but same temperature optima (D) different pH and temperature optima (Ans : C)

21. Coenzyme is–

(A) always protein (B) often metal

(C) always inorganic compound (D) often a vitamin (Ans : D)

22. Cholesterol is one kind of–

(A) Saturated fatty acid (B) unsaturated fatty acid

(C) Steroid (D) Diglyceride (Ans : A)

23. Ethyl-alcohol is mixed completely with water. How ethyl alcohol is separated from the mixture ?

(A) by separation flannel (B) by evaporation

(C) partial-distillation (D) evaporation of water (Ans : C)

24. White vitriol is–

(A) FeSO4, 7H2O (B) ZnSO4, 7H2O

(C) MgSO4, 7H2O (D) CuSO4, 7H2O (Ans : B)

25. Combustion is a process by which–

(A) heat is produced (B) light is produced

(C) heat and light both are produced (D) None of these (Ans : C)

Set 4:-

1. Which of the following is the best conductor of Electricity ?

(A) Ordinary water (B) Sea water

(C) Boiled water (D) Distilled water (Ans : B)

2. Balloons are filled with–

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(A) Helium (B) Oxygen

(C) Nitrogen (D) Argon (Ans : A)

3. The charcoal used to decolourise raw sugar is–

(A) Animal charcoal (B) Sugar charcoal

(C) Cocoanut charcoal (D) Wood charcoal (Ans : D)

4. Washing soda is the common name of–

(A) Calcium Carbonate (B) Calcium Bi-Carbonate

(C) Sodium Carbonate (D) Sodium Bi-Carbonate (Ans : C)

5. The filament of electric bulb is made of–

(A) Iron (B) Nichrome

(C) Tungsten (D) Graphite (Ans : C)

6. Bleaching powder is made from–

(A) Sulphur dioxide and gypsum (B) Chlorine and Charcoal

(C) Soda ash and lime (D) Lime and Chlorine (Ans : D)

7. Brass is an alloy of–

(A) Nickel and Copper (B) Copper and Silver

(C) Nickel and Zinc (D) Zinc and Copper (Ans : D)

8. The element required for Solar energy conversion–

(A) Beryllium (B) Silicon

(C) Tantalum (D) Ultra pure carbon (Ans : B)

9. Monazite is an ore of–

(A) Sodium (B) Titanium

(C) Thorium (D) Zirconium (Ans : C)

10. The gas usually causing explosions in coal mines is–

(A) Hydrogen (B) Carbon monoxide

(C) Air (D) Methane (Ans : D)

11. Cotton fibers are made of–

(A) cellulose (B) starch

(C) proteins (D) fats (Ans : A)

12. Which of the following ores does not contain iron?

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(A) Haematite (B) Magnetite

(C) Limonite (D) Cassiterite (Ans : D)

13. Which variety of glass is heat resistant ?

(A) Hard glass (B) Flint glass

(C) Pyrex glass (D) Bottle glass (Ans : C)

14. Which of the following is used for removing air bubbles from glass during its manufacture ?

(A) Fledspar (B) Arsenic oxide

(C) Potassium Carbonate (D) Soda Ash (Ans : B)

15. What are soaps ?

(A) Salts of silicates (B) Ester of heavy fatty acids

(C) Sodium or potassium salts of heavier fatty acids (D) Mixture of glycerol and alcohol (Ans : C)

16. In which following processes light energy is converted into chemical energy ?

(A) Respiration (B) Fermentation

(C) Photosynthesis (D) Photorespiration (Ans : C)

17. Cooking oil can be converted into vegetables ghee by the process of–

(A) Oxidation (B) Hydrogenation

(C) Distillation (D) Crystallisation (Ans : B)

18. Photosynthesis is–

(A) An exothermic process (B) An endothermic process

(C) A neutral process (D) A thermostatic process (Ans : B)

19. J. B. Sumner isolated first enzyme from Jackbeans as–

(A) amylase (B) trypsin

(C) urease (D) renin (Ans : C)

20. Enzymes are absent in–

(A) fungi (B) bacteria

(C) viruses (D) algae (Ans : C)

21. The enzymes sucrase acts on–

(A) sucrose only (B) sucrose and starch

(C) all disaccharides (D) any organic monomer (Ans : A)

22. C.T. Scanning uses–

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(A) Ultrasound waves (B) Gamma rays

(C) X-rays (D) None of the above (Ans : A)

. Chemically speropolenin is a / an–

(A) co-polymer of carotinoid and fatty acid (B) Carbohydrate

(C) Propene (D) Lactic acid (Ans : A)

24. A mixture of salt and sand can be separated by–

(A) Sublimation (B) Dissolving water

(C) Gravity separation (D) Dry distillation (Ans : B)

25. PVC is obtained by the polymerisation of–

(A) propane (B) vinyl chloride

(C) styrene (D) Acetylene (Ans : B)

Set 5:- . The most abundant metal in the earth s crust is–

(A) Zinc (B) Copper

(C) Aluminium (D) Iron (Ans : C)

2. The gas used to extinguish fire is–

(A) Neon (B) Nitrogen

(C) Carbon dioxide (D) Carbon Monoxide (Ans : C)

3. In which of the following activities Silicon Carbide is used ?

(A) Making cement and glass (B) Disinfecting water and ponds

(C) Making castes for statues (D) Cutting very hard substances (Ans : D)

4. The two elements that are frequently used for making transistors are–

(A) Boron and Aluminium (B) Silicon and Germenium

(C) Iridium and Tungsten (D) Niobium and Columbium (Ans : B)

5. Which of the following gas is not known as green house gas ?

(A) Methane (B) Carbon dioxide

(C) Nitrous oxide (D) CFC (Ans : C)

6. Which of the following is not a neutral oxide ?

(A) Carbon Monoxide (B) Sulphur Dioxide

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(C) Water (D) Nitric Oxide (Ans : B)

7. Potassium Permanganate is used for purifying drinking water, because–

(A) It dissolves the impurities of water (B) It is a sterilizing agent

(C) It is an oxidising agent (D) It is a reducing agent. (Ans : C)

8. The presence of which of the following salts in water causes corrosion in steam boilers ?

(A) Sodium Chloride (B) Magnesium Chloride

(C) Calcium bicarbonate (D) Potassium bicarbonate (Ans : B)

9. Water is a good solvent of ionic salts because–

(A) It has no colour (B) It has a boiling point

(C) It has a high dipole moment (D) It has a high specific heat (Ans : C)

10. Nuclear fission is caused by the impact of–

(A) Proton (B) Electron

(C) Neutron (D) (A) and (b) (Ans : C)

11. Which is a good nuclear fuel ?

(A) Uranium – 238 (B) Neptunium – 239

(C) Thorium – 236 (D) Plutonium – 236 (Ans : C)

12. Long distance photography is facilitated by–

(A) Visible light (B) X-rays

(C) Infra Red rays (D) Ultra violet rays (Ans : C)

13. Which of the following is used in making artificial sweetener saccharine ?

(A) Benzene (B) Toluene

(C) Phenol (D) Aniline (Ans : B)

14. Rayon is chemically–

(A) Glucose (B) Amylase

(C) Cellulose (D) Peptin (Ans : C)

15. Which of following is used as a filter in rubber tyres?

(A) Graphite (B) Coal

(C) Coke (D) Carbon Black (Ans : D)

16. Which of the following substances exhibit the property of sublimation ?

(A) Ice (B) Wax

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(C) Camphor (D) Ethyl Alcohol (Ans : C)

17. Combustion is the process in which–

(A) Heat is produced (B) Light is produced

(C) Heat and Light is produced (D) None of these (Ans : C)

18. The chemical used as a fixer in photography is–

(A) Borax (B) Sodium thiosulphate

(C) Sodium Sulphate (D) Ammonium persulphate (Ans : B)

19. Vitamins are–

(A) inorganic substances which cannot be synthesized by animals

(B) inorganic by animals

(C) organic substances that cannot be generally synthesized by animals

(D) organic substances which can be commonly synthesized by animals (Ans : C)

20. Richest source of vitamin B1 (thiamine) is–

(A) cod liver oil (B) curd

(C) whole bread meal (D) eggs (Ans : C)

21. One of these vitamins is called erythrocyte maturation factor–

(A) A (B) C

(C) K (D) B12 (Ans : D)

22. Saponification involves the hydrolysis of fats and oils by–

(A) water (B) washing soda

(C) stearic acid (D) caustic soda (Ans : D)

23. Photo-synthesis is a/ an–

(A) exothermic process (B) endothermic process

(C) a neutral process (D) a thermostatic process (Ans : B)

24. Which of the following is a physical change ?

(A) oxidation (B) reduction

(C) sublimation (D) decomposition (Ans : C)

25. The process by which an organic compound breaks down into simpler compounds on heating to high

temperature is known as–

(A) Aromatisation (B) Polymerisation

(C) Pyrolysis (D) Reduction (Ans : C)

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Set 6:-

1. The element common to all acids is–

(A) Oxygen (B) Hydrogen

(C) Nitrogen (D) Sulphur (Ans : B)

2. Gobar gas contains mainly–

(A) Methane (B) Carbon dioxide

(C) Butane (D) Carbon Monoxide (Ans : A)

3. The most malleable metal is–

(A) Silver (B) Gold

(C) Aluminium (D) Sodium (Ans : B)

4. Which of the following is used in making smoke bombs ?

(A) Sulphur (B) Phosphorus

(C) Hydrogen (D) Carbon (Ans : B)

5. Caustic Soda is–

(A) Nacl (B) Na2CO3

(C) NaOH (D) NaHCO3 (Ans : C)

6. Chemical formula of Water glass is–

(A) Na2SiO3 (B) Al2O3

(C) NaAlO2 (D) CaSiO3 (Ans : A)

7. The hardest substance available in earth is–

(A) Platinum (B) Silicon

(C) Diamond (D) Gold (Ans : C)

8. Which of the following is the best conductor of electricity ?

(A) Zinc (B) Copper

(C) Gold (D) Silver (Ans : D)

9. The ratio of pure gold in 18 carat gold is–

(A) 60% (B) 75%

(C) 80% (D) 100% (Ans : B)

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10. Which radioactive pollutant has recently drawn the attention of the public due to its occurance in the

building materials ?

(A) Radium (B) Radon

(C) Thorium (D) Plutonium (Ans : C)

11. In an atomic explosion enormous energy is released which is due to the–

(A) Conversions of neutrons into protons (B) Conversion of chemical energy into nuclear energy

(C) Conversion of mechanical energy into nuclear energy (D) Conversion of mass into energy (Ans : D)

12. Which of the following is used as a coolant in nuclear reactors ?

(A) Heavy water (B) Cadmium

(C) Liquid sodium (D) Graphite (Ans : C)

13. In vulcanization, natural rubber is heated with–

(A) Carbon (B) Sulphur

(C) Silicon (D) Phosphorus (Ans : B)

14. Which type of fire extinguisher is used for petroleum fire ?

(A) Foam type (B) Soda acid type

(C) Powder type (D) None of these (Ans : C)

15. Which is/ are the important raw materials in cement industry ?

(A) Limestone (B) Gypsum and Clay

(C) Clay (D) Limestone and Clay (Ans : D)

16. A mixture of iron filings and sand can be separated by–

(A) Heating (B) Sublimation

(C) Hand picking (D) Magnetic Separation (Ans : D)

17. In which of the following process, Vanadium Pentoxide is used as a catalyst ?

(A) Contact process (B) Haber process

(C) Solvary process (D) None of these (Ans : A)

18. The rate of chemical reaction does not depend on–

(A) Concentration (B) Catalyst

(C) Temperature (D) Pressure (Ans : D)

19. The vitamin which can be synthesized in the gut by bacterial action is–

(A) vitamin B1 (B) vitmain B2

(C) vitmain B12 (D) All above (Ans : D)

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20. Deficiency of vitamin D causes–

(A) rickets (B) beri-beri

(C) scurvy (D) night blindness (Ans : A)

21. Which one of the following is the best source of vitamin A?

(A) Apple (B) Carrot

(C) Amla (D) Raddish (Ans : B)

22. Which of the following is not a chemical reaction ?

(A) Burning of paper (B) Digestion of food

(C) Conversion of water into steam (D) Burning of coal (Ans : C)

23. Which of the following is a chemical change ?

(A) Rusting of iron (B) Tempering of iron

(C) Melting of iron (D) Bending of iron (Ans : A)

24. Photoelectric effect was discovered by–

(A) Einstein (B) Hertz

(C) Bohr (D) Plank (Ans : A)

25. The hydrogenation of the vegetables oils takes place in the presence of finely divided–

(A) aluminium (B) charcoal

(C) silica (D) nickel (Ans : D)

Set 7:-

1. Tetraethyl lead is used as–

(A) Mosquito repellent (B) Pain Killer

(C) Fire extinguisher (D) Petrol additive (Ans : D)

2. Which of the following is used in beauty parlours for hair setting ?

(A) Phosphorus (B) Sulphur

(C) Chlorine (D) Silicon (Ans : B)

3. Which of the following is a non-metal that remains liquid in room temperature ?

(A) Bromine (B) Chlorine

(C) Helium (D) Phosphorus (Ans : A)

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4. Which of the following is not a bleaching agent?

(A) Sulpher di-oxide (B) Carbon di-oxide

(C) Sodium hypochlorite (D) Chlorine (Ans : B)

5. The gas usually filled in electric bulb is–

(A) Hydrogen (B) Oxygen

(C) Nitrogen (D) Carbon di-oxide (Ans : C)

6. Heavy water is–

(A) Tritium oxide (B) Deuterium oxide

(C) Rain water (D) Water at 4°C (Ans : B)

7. Cow milk is a rich source of–

(A) Vitamin A (B) Vitamin B1

(C) Vitamin C (D) Vitamin D (Ans : B)

8. The element found in the surface of the Moon is–

(A) Tin (B) Tungsten

(C) Tantalum (D) Titanium (Ans : D)

9. The average salinity of sea water is–

(A) 2% (B) 3%

(C) 2.5% (D) 3.5% (Ans : D)

10. The isotope of Uranium capable of sustaining chain reaction is–

(A) U 235 (B) U 238

(C) U 239 (D) None of these (Ans : A)

11. Radioactive disintegration of Uranium ultimately results in formation of–

(A) Radium (B) Thorium

(C) Polonium (D) Lead (Ans : D)

12. Atom bomb is made on the basis of–

(A) Nuclear fusion (B) Nuclear fission

(C) Both (A) and (B) (D) None of these (Ans : B)

13. Which of the following is the petroleum wax ?

(A) Bees wax (B) Carnauba wax

(C) Paraffin wax (D) Jojoba wax (Ans : C)

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14. Which of the following fibres is generally preferred for making gauze and lint ?

(A) Cotton (B) Rayon

(C) Nylon (D) Terylene (Ans : B)

15. Rubber is coagulated from latex by adding–

(A) Hydrochloric acid (B) Acetic acid

(C) Sulphuric acid (D) Carbonic acid (Ans : B)

16. Which of the following metals can displace hydrogen from dilute acids ?

(A) Zinc (B) Gold

(C) Copper (D) Silver (Ans : A)

17. Reaction of alcohol, with carboxylic acid is known as–

(A) Substitution reaction (B) Addition reaction

(C) Esterification (D) Hydrogenation (Ans : C)

18. Saponification involves the hydrolysis of fats and oils by–

(A) Water (B) Washing soda

(C) Stearic acid (D) Caustic acid (Ans : D)

19. Ascorbic acid is–

(A) Vitamin K (B) Vitamin B

(C) Vitamin A (D) Vitamin C (Ans : D)

20. Sterility in some animals is caused due to deficiency of–

(A) vitamin B (B) vitamin D

(C) vitamin B12 (D) vitamin E (Ans : D)

21. At the boiling temperature an enzyme becomes–

(A) killed (B) denatured

(C) uneffected (D) inactivated (Ans : B)

22. The penetrating power is maximum in–

(A) a-rays (B) b-rays

(C) g-rays (D) cathode rays (Ans : A)

23. Which of the following rays carry no charge ?

(A) Cathode rays (B) X-rays

(C) a-rays (D) Positive rays (Ans : B)

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24. An atom bomb is based on the principle of–

(A) Chemical reaction (B) Chain reaction in the form of fission

(C) Nuclear fusion (D) None (Ans : B)

25. In which of the following processes light energy is converted into chemical energy ?

(A) Respiration (B) Fermentation

(C) Photosynthesis (D) Photorespiration (Ans : C)

Set 8:-

1. From which mineral is radium obtained–

(A) Limestone (B) Haematitie

(C) Pitchblende (D) Rutile (Ans : C)

2. What is laughing gas ?

(A) Carbon dioxide (B) Sulphur dioxide

(C) Nitrogen Dioxide (D) Nitrous oxide (Ans : D)

3. Which of the following is used as a material for making protective windows in space probes ?

(A) Steel (B) Graphite

(C) Tungsten (D) Diamond (Ans : D)

4. The gases used in different types of welding would include–

(A) Oxygen and Hydrogen (B) Oxygen, acetylene and argon

(C) Oxygen and acetylene (D) Oxygen, hydrogen and nitrogen (Ans : C)

5. Which of the following alloys is used for making magnets ?

(A) Duralumin (B) Stainless Steel

(C) Alnico (D) Magnelium (Ans : C)

6. Parmanent hardness of water may be removed by the addition of–

(A) Alum (B) Sodium Carbonate

(C) Lime (D) Potassium Permanganate (Ans : B)

7. Which of the following is the most stable element?

(A) Uranium (B) Hydrogen

(C) Oxygen (D) Lead (Ans : D)

8. Find the odd one ?

(A) Marble (B) Chalk

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(C) Lime Stone (D) Slaked Lime (Ans : D)

9. Diamond is harder than graphite because of–

(A) Difference of layers of atoms (B) Tetrahedral structure of diamonds

(C) Difference of crystaline structures (D) None of these (Ans : C)

10. Which of the following has least penetrating power?

(A) Alpha particles (B) Beta particles

(C) Gamma particles (D) All have same power (Ans : A)

11. What is increasing order of the wave lengths of the following colours–

1. Orange 2. Indigo 3. Yellow 4. Violet

(A) 1, 2, 3, 4 (B) 3, 4, 1, 2

(C) 4, 3, 2, 1 (D) 4, 2, 3, 1 (Ans : D)

12. Atoms are composed of–

(A) Electrons only (B) Protons only

(C) Electrons and Protons (D) Electrons and Nuclei (Ans : D)

13. Paper is manufactured by–

(A) Wood and resin (B) Wood, Sodium and Bleaching powder

(C) Wood and bleaching powder (D) Wood, Calcium, hydrogen sulphate and resin (Ans : D)

14. Which synthetic fibre is known as artificial silk ?

(A) Cotton (B) Rayon

(C) Terylene (D) Nylon (Ans : B)

15. Deep blue colour is imparted to glass by the presence of–

(A) Iron oxide (B) Cupric oxide

(C) Nickel oxide (D) Cobalt oxide (Ans : D)

16. Which of the following gases is obtained by the reaction of water with Calcium Carbide ?

(A) Acetylene (B) Ethylene

(C) Methane (D) Water gas (Ans : C)

17. The gas liberated during the reaction of copper with dilute nitric acid is–

(A) NO2 (B) N2O5

(C) O2 (D) NO (Ans : D)

18. Which of following substances undergoes chemical change on heating ?

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(A) Sodium Chloride (B) Silica

(C) Lead Nitrate (D) Platinum wire (Ans : C)

19. Starch hydrolysing enzyme is–

(A) sucrose (B) invertase

(C) amylase (D) cellulase (Ans : C)

20. The enzyme used for the formation of RNA on DNA is–

(A) DNA polymerase (B) endonuclease

(C) topoisomerase (D) RNA polymerase (Ans : D)

. The term enzyme was coined by–

(A) de Duve (B) Kunhe

(C) C. Darwin (D) de Candolle (Ans : B)

22. A plant cell differs from an animal cell in the absence of–

(A) mitochondria (B) centrioles

(C) ribosomes (D) endoplasmic reticulum (Ans : B)

23. A Vitamin, the absence of which leads to sterility in both males and females is–

(A) Vitamin K (B) Vitamin C or ascorbic acid

(C) Vitamin D or calciferol (D) Vitamin E or tocopherol (Ans : D)

24. Anaemia is caused in man due to the deficiency of–

(A) folic acid (B) vitamin A

(C) vitamin B12 (D) none (Ans : A)

25. Rusting of iron involves–

(A) oxidation (B) reduction

(C) decomposition (D) displacement (Ans : A)

Set 9:-

1. Which form of phosphorus is used in safety metals?

(A) Red Phosphorus (B) White Phosphorus

(C) Yellow Phosphorus (D) Black Phosphorous (Ans : A)

2. Stainless steel is an alloy of–

(A) Iron, Carbon and Nickel (B) Iron and Manganese

(C) Iron, Chromium and Zinc (D) Iron, Chromium and Nickel (Ans : D)

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3. Which of the following is not correctly matched ?

(A) Galena : Lead Sulphide (B) Green vitriol : Copper sulphate

(C) Plaster of Paris : Calcium sulphate (D) Calomel : Mercurous Chloride (Ans : B)

4. Potassium nitrate is used in–

(A) Salt (B) Glass

(C) Fertiliser (D) Medicine (Ans : B)

5. In which type of rocks are metals like Gold and Copper mostly found ?

(A) Old igneous (B) Old sedimentary

(C) Old metamorphic (D) New metamorphic (Ans : A)

6. Which of the following gases is lighter than air ?

(A) Carbon dioxide (B) Oxygen

(C) Ammonia (D) Chlorine (Ans : C)

7. A super conductor is characterised by–

(A) Zero permeability (B) Low permeability

(C) High permeability (D) Infinite permeability (Ans : A)

8. Of the various forms of carbon, which one is used for absorption purpose ?

(A) Diamond (B) Graphite

(C) Coke (D) Wood Charcoal (Ans : D)

9. The main constituents of Pearl are–

(A) Calcium Carbonate, Magnesium Carbonate (B) Calcium oxide, Ammonium Chloride

(C) Argonite , Chonchiolin (D) Ammonium Sulphate, Sodium Carbonate (Ans : A)

10. The age of most ancient geological formation is estimated by–

(A) Potassium-Argon method (B) Ra-Si method

(C) C14 method (D) Uranium-lead method (Ans : C)

11. Which of the following is used as a moderator in nuclear reactor ?

(A) Ordinary water (B) Radium

(C) Thorium (D) Graphite (Ans : D)

12. Isotopes are separated by–

(A) Filtration (B) Sublimation

(C) Distillation (D) Crystalization (Ans : C)

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13. The combustible material at the tip of a safety match stick is–

(A) Sulphur (B) Manganese dioxide

(C) Phosphorus (D) Antimony sulphide (Ans : D)

14. Which of the following roofs provide better protection against fire ?

(A) Cement slab (B) Asbestos sheet

(C) Reinforced concrete (D) None of these (Ans : B)

15. The material used for bleaching paper pulp is–

(A) Chlorine (B) Caustic soda

(C) Sodium Hypochlorite (D) Lime (Ans : C)

16. Water is neither acidic nor alkaline because–

(A) it cannot accept or donate protons (B) it boils at high temperature

(C) it can dissociate into equal number of hydrogen ions (D) it cannot donate or accept electrons (Ans : C)

17. PVC is obtained by the polymerisation of–

(A) Propene (B) Vinyl Chloride

(C) Styrene (D) Acetylene (Ans : B)

18. Which of the following metals can displace zinc from a solution of zinc sulphate ?

(A) Lead (B) Magnetism

(C) Iron (D) Mercury (Ans : B)

19. Which set of conditions represents easiest way to liquify gas ?

(A) Low temperature, high pressure (B) High temperature, low pressure

(C) Low temperature, low pressure (D) High temperature, high pressure (Ans : A)

20. Artificial rain is caused by spraying small pellets of which of the following over clouds ?

(A) Ice (B) Dry Ice

(C) NaOH (D) NH4Cl (Ans : C)

21. Galvanisation is deposition of–

(A) Zinc of iron (B) aluminium on Iron

(C) tin on iron (D) copper on iron (Ans : A)

22. Antibiotics are drugs used for the cure of–

(A) Bacterial diseases (B) Cancer

(C) Malaria (D) Nervous disorders (Ans : A)

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23. Blood does not coagulate inside the body due to the presence of–

(A) haemoglobin (B) heparin

(C) fibrin (D) plasma (Ans : B)

24. Blood pressure is dependent on–

(A) systolic force (B) cardiac output

(C) peripheral resistance (D) all of these (Ans : D)

25. LPG contains–

(A) Butane and isobutene (B) Butane and Propane

(C) Isobutane and Propane (D) Butane, Isobutane and Propane (Ans : B)

Set 10:-

1. Which of the following metals forms an amalgum with other metals ?

(A) Lead (B) Tin

(C) Zinc (D) Mercury (Ans : D)

2. Which of the following is not an ore of Aluminium?

(A) Felsper (B) Bauxite

(C) Cryolite (D) Azurite (Ans : D)

3. Most soluble in water is–

(A) Camphor (B) Sugar

(C) Sulphur (D) Common Salt (Ans : B)

4. Which of the following is used as lubricant ?

(A) Graphite (B) Silica

(C) Diamond (D) Iron Oxide (Ans : A)

5. The purest form of iron is–

(A) Steel (B) Pig iron

(C) Cast iron (D) Wrought iron (Ans : D)

6. The percentage of carbon is the least in–

(A) Grey cast iron (B) Wrought iron

(C) White cast iron (D) Steel (Ans : D)

7. An element that does not occur in nature but can be produced artificially is —

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(A) Thorium (B) Radium

(C) Plutonium (D) Uranium (Ans : C)

8. The inert gas which is substituted for nitrogen in the air, used by deep sea drivers for breathing is–

(A) Helium (B) Argon

(C) Krypton (D) Xenon (Ans : A)

9. The group of metals Fe, Co, Ni may be best called as–

(A) Alkali metals (B) Rare metals

(C) Main group metals (D) Transition metals (Ans : D)

10. Who suggested that the most of the mass of atom is located in nucleus ?

(A) Bohr (B) Thomson

(C) Rutherford (D) Avogadro (Ans : C)

11. Meson particles are found in–

(A) R-rays (B) X-rays

(C) Laser beam (D) Cosmic rays (Ans : D)

12. An atom of an element with mass number 23 and atomic number 11 will have–

(A) 11 neutrons, 12 protons and 11 electrons (B) 11 protons, 12 neutrons and 11 electrons

(C) 11 protons, 12 electrons and 11 neutrons (D) 23 protons and 11 electrons (Ans : B)

13. Which of the following is a protein ?

(A) Wool (B) Starch

(C) Natural rubber (D) Cellulose (Ans : C)

14. Soap is a mixture of sodium or potassium salts of—

(A) Monocarboxylic acid (B) Glycerols

(C) Dicarboxylic acid (D) Tricarboxylic acid (Ans : A)

15. Which of the following material is used to prepare blue-black ink ?

(A) Gallic acid (B) Tannic acid

(C) Ferrous sulphate (D) All of these (Ans : D)


(A) Steam over white hot coke (B) Air over red hot coke

(C) Methane over red hot coke (D) Steam over heated sulphur (Ans : A)

17. Which of the following metals react with nitrogen to form nitride ?

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(A) Sodium (B) Potassium

(C) Magnesium (D) None of these (Ans : C)

18. One micron is equal to–

(A) 1/10th of mm (B) 1/100th of mm

(C) 1/1000th of mm (D) 1/10000th of mm (Ans : C)

19. Equal volumes of different gases at any definite temperature and pressure have–

(A) Equal weights (B) equal masses

(C) equal density (D) equal no. of molecules (Ans : D)

20. Milk is an example of–

(A) suspension (B) true solution

(C) emulsion (D) gel (Ans : C)

21. Which of the following modes of expressing concentration is independent of temperature–

(A) Molarity (B) Molality

(C) Normality (D) Formality (Ans : B)

22. Which of the following substances undergoes chemical change on heating ?

(A) Sodium chloride (B) Silica

(C) Lead nitrate (D) Platinum wire (Ans : C)

23. Vulcanisation is a–

(A) Science of studying volcanoes

(B) method of degrade polymers

(C) Process connected with the making of voltaic cells

(D) Process of hardening of rubber by heating it with sulphur. (Ans : D)


(A) steam over white-hot coke (B) air over red-hot coke

(C) methane over red-hot coke (D) steam over heated sulphur (Ans : A)

25. The hormone which stimulates milk production in mammal is known as–

(A) Glucagon (B) prolactin

(C) progesterone (D) oestrogen (Ans : B)

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One liner Gk 100: 1. A bullet hits and gets embedded in a solid block resting on a horizontal frictionless table. What is conserved ? – Momentum

2. Which mixture is homogeneous? – Methanol and water

3. What is formed by strong heating of potassium petmanganate? – O2

4. Most of the digestion occur in which part of alimentory canal of man? – Small intestine

5. What is the Branch of biology in which we study about relationship between living and their

environment? – Ecology

6. Why does a man inside an artificial satellite feels weightlessness? – Because the force of attraction due to

earth is zero at that earth is

7. Which has the longest wave length? – Infra red radiation

8. Which plant produce seed but not fruit? – Mint

9. When are positive ions are formed from neutral atoms? – By loss of electrons

10. Which Bacteria convert atmospheric nitrogen into nitrogenous compound? – Nitrogen fixing bacteria

11. If the ratio of the amplitudes of two waves is 4 : 3, then what will be the ratio of maximum and minimum

intensity? – 49 : 1 . When the universal gas constant R is divided by Avogadro s number N , what is their ratio called? – Boltzmann s constant 13. Why is yeast is used in bakery in the preparation of bread? – Because it make bread soft and spongy

14. Which variety of glass is used for the manufacture of optical glasses? – Flint glass

15. Sex determination of child is done by whose chromosome? – Father

16. In a stationary longitudinal wave, nodes are points of which variation? – Maximum pressure variation

17. Which crop enrich the soil with nitrogen? – Pea

18. At constant temperature, the product of pressure and volume of a given amount of a gas is constant,

whose this law? – Boyles law 19. If the amplitude of sound is doubled and the frequency reduced to one-fourth, what will the intensity? –

Decrease by a factor of 4

20. What is good source of protein ? – Soyabean

21. The compressed gas available in cooking gas cylinder is a mixture of which gases? – C4H10 + C3H8

22. What is the temperature at which the speed of sound in air becomes double of its value at 27°C? – 927°C

23. For television broadcasting. how much MHz frequency employed normally? – 30-300 MHz

24. Which insect spreads kala-azar? – Sand fly

25. By which enzyme is Urea converted into ammonia and carbon dioxide? – Urease

26. In the leaf of tobacco what is found? – Nicotin

27. Which property occurs in alkali metals? – Largest atomic radil

28. A number of images of a candle flame are seen in thick mirror which image will be brightest? – The

second image is the brightest

29. Parthanogenesis is seen generally in which fruit? – Grapes

30. Inert gases (Except Helium) comes in which block in the periodic table? – p-block

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31. Whose experiments proved that the speed of light was always the same? – Michelson and Marley

32. Why do Blood cells do not shrink in blood? – Because blood is isotonic

33. Which stem is modified to perform the function of leaf and many internodes called? – Phylloclade

34. What is the process of slow and homogeneous cooling of glass called? – Annealing of glass

35. Which is largest cell organelles? – Plastid

36. An endoscope is employed to view the internal parts of the body organ. It is based on the principle of

which reflection? – Internal reflection

37. A solution contains 1 mole alcohol and 4 mole water. What will mole fraction of water and alcohal be? –

4/5 and 1/5

38. What is the process in which loss of water occurs in the form of water vapour through aerial part of

plant? – Transpiration

39. A strong magnetic field is applied on a stationary electron, then how will the electron? – Remains

stationary

40. Why does Pure water not conduct electricity? – Because it is almost not ionised

41. Besides water and light which is more essential as a raw material for photosynthesis? – CO2

42. Why is the conduction of electricity through the electrolyte solution? – Due to movement of ions of

electrolyte

43. Which fraction is obtained between temperature 150–300°C during fractional distillation of crude

petroleum? – Kerosene

44. What is the process of transfer of genetic information from DNA to RNA or formation of RNA from DNA? – Transcription

45. What is the Study of integrated use of microbiology, biochmistry and engineering? – Biotechnology

46. If a proton is brought towards an electron from infinity, how will the potential energy of the system? –

Decrease

47. What is an example of emulsion? – Milk

48. Which system is formed by the interaction of a community of organisms with its environment? –

Ecosystem

49. Which branch of science deals with the study of tissue found in the body of organism? – Histology

50. In the electrolysis the amount of mass deposited or liberated at an electrode is directly proportional to

which thing? – Amount of charge

51. Activated charcoal is employed to remove colouring matter from pure substance, it work? – Adsorption

52. Which substance is more than 80% in the cell? – Water

53. A horizontal cable carries a current from west to east. the direction of the magnetic field produced by

the current at a point vertically above the wire is which side? – North to south

54. What is the Eosin used to detect the end point of precipitation titration by adsorption called? – Normal

indicator

55. Which branch of science that deals with the study of law is genetics for the improvement of human race? – Eugenics

56. What is the bond between two amino acids in a protein? – Ester bond

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57. What is the Study of inter-relationships between an entire community and its environment? –

Synecology

58. Ophthalmology is the branch of science in which we study about which thing? – Eye

59. The process of converting hydrate Al2O3 into anhydrous aluminium is known as which name? –

Calcination

60. Fluorescent tubes are fitted with a choke. What does the choke coil? – Reduces current in the circuit

61. What is the second most common element in the universe? – Si

62. Entamoeba histolytica is found in which part of man? – Intestine

63. What is the maximum number of different electrical combination possible with three equal resistances? – 4

64. Which is the compound in that oxygen shows + 2 oxidation state? – F2O . The statements Protoplasm is the physical basis of life is given by which person? – Purkinje

66. Purification of aluminium by electrolyte refining is known as which name? – Hoope s process 67. Malaria parasite and Amoeba are grouped under? – Protozoa

68. Magnetic dipole moment is a vector quantity directed from which direction? – South to north . What is France s global ranking in terms of the number of animal species under threat? – 8

70. Which is the largest phylum in the animal kingdom in respect of number of species? – Arthropoda

71. A large magnet is broken into two pieces. If the lengths of two pieces are in the ratio of 3 : 4. what is the

ratio of their pole strengths? – 1 : 1

72. Van arkel method of purification of metals involves converting the metal to which compound? – Volatile

compound

73. By whom was Tetrahedral nature of bonding in carbon atom first shown? – van t Hoff and Le-Bel

74. Which ancestor of man for the first time began the bipedal locomotion ? – Australopithecus

75. Which is the contractile protein muscle? – Myosin

76. Which is the compound in that oxygen shows –1 oxidation state is? – Na2O2

77. What is the reason of floating of the ore particles in concentration by froth floatation process? – Their

being hydrophobic

78. What is also known as green protozo? – Euglena

79. If the electric current in a lamp decreases by 5% then the power output decreases by how many

percentages? – 10%

80. Acid rain is caused due to emission of which gases into the atmosphere? – Oxides of nitrogen and

sulphur

81. Which naturally occurring element in the rice husk makes it termite resistant? – Silicon

82. Which quantity remains constant in a step-down transformer? – Power

83. In the extraction of zinc the formation of blue flame is due to the burning of which gas? – CO

84. What number of essential amino acid is found in man? – 20 . Which of the following potassium compounds is known as Pearl ash ? – K2CO3

86. By which is the amount of light entering into the eye controlled? – Iris

87. Over the last 100 years global sea level has risen by about howmany cm? – 10-12. 5 cm

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Railway Exam Oriented General Science . Whose statement is this? Algebraic sum of the current meeting at a node is zero – – Kirchhoff s law 89. What is formed when white phosphorus is heated at 540 K in the absence of air? – Red phosphorus

90. Which tissue help in keeping the body warm? – Fatty tissue

91. A particle of mass m and charge q travels from rest through a potential difference V. What is its final

energy? – qV

92. Why are elements of group I known as alkali metals? – Their oxides are alkaline

93. In which organ carbohydrate is stored as glycogen? – Liver

94. Which particle has the longest de Broglie wavelength if they are moving with same velocity ? – â-particle

95. Which pollutant is main product of automobile exhaust? – NO

96. If all plant of the world die than why will all animal ultimately die? – Due to Lack of oxygen

97. Why does Coagulation of blood not occur inside human body? – Due to presence of Heparin

98. Which oxide is amphoteric in nature? – SnO2

99. In methane molecule how are the four hydrogen atoms arranged? – As tetrahedral

100. What is an association of individuals of different species living in the same habitat and having

functional interactions? – Biotic community

One liner Gk 100:

1. What is the name of the scientist who stated that matter can be converted into energy? – Einstein

2. The isotopes of chlorine with mass number 35 and 37 exist in which ratio? – 3 : 1

3. A gas is found to have the formula (CO)n. Its vapour density is 70. What must the value of n be? – 5

4. Which law directly explains the law of conservation of mass? – Avogadro s law 5. To whom the credit for the discovery of transuranic element goes? – Seaborg

6. How many moles are there is 140 g of Si (atomic mass of silicon is 28)? – 5

7. Which substance does not have a melting point? – Glass

8. By which a mixture of sand and naphthalene can be separated? – sublimation

9. An element X forms an oxide X03. What is the valency of X? – 6

10. Sodium carbonate crystals lose water molecules. What is this property called? – Efflorescence

11. By whom was the law of constant proportions enunciated? – Proust

12. What is the number of unpaired electrons in carbon atom? – 2

13. In an atom the order of filling up of the orbitals is governed by which principle? – Aufbau principle

14. Regarding the atom of a chemical element, magnetic quantum number refers? – Orientation

15. What are the atoms of the elements having same mass number but different atomic number called? –

isobars . Rutherford s scattering experiment related to the size of which thing? – nucleus

17. By whom was the absolute value of charge on electron determined? – R.A. Millikan

18. Which property of the elements is a whole number? – Atomic number

19. Discovery of the nucleus of an atom was due to the experiment carried out by which person? – Rutherford

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20. What are the atoms of the elements which have same number of neutrons called? – Isotones

21. Whose experiment proved that the speed of light was always the same? – Michelson and Morley

22. Which element has two electrons in the K-shell only? – Helium

23. What is Electromagnetic radiation with maximum wavelength? – Radio waves

24. Which nuclear particles responsible for holding all nucleons together? – Mesons

25. In which process, a nucleus spontaneously breaks down by emitting radiation? – Radioactive decay

26. In atomic reactors, graphite is used as which name? – Moderator

27. Why is Cobalt-60 commonly used in radiation therapy? –Because it emits gamma rays

28. A radioactive substance has a half life of four months. Three-fourth of the substance would decay in

howmany months? – 8 months

29. What is a bond formed by the transfer of electrons between atoms of the elements called? – ionic bond

30. What is a bond formed by sharing of electrons between atoms of the elements called? – covalent bond

31. What is the maximum number of hydrogen bonds in a H2O molecule? – 4

32. Select the compound in which chlorine shows oxidation state + 7? – HClO4

33. What is the oxidation of two Cl atoms in bleaching powder Ca(OCl) Cl? – +1,–1

34. What is the Oxidation state of Mn in acidic KMnO4 change from? – +7 to +2

35. Why is Molten NaCl good conductor of electricity? – Free ions

36. What is the common oxidation state of alkali metals in the combined state? – +1

37. What is the oxidation number and covalency-of sulphur in S8? – 0, 2

38. Starch iodide paper is used to test for the presence of which agent? – Oxidising agent

39. The pH of water at 25° C is 7. When it is heated to 100°C, what will the pH of water? – increases

40. When Metal carbonate reacts with dilute acids, what does it forms? – CO2

41. The element common to all the acids is known as which name? – Hydrogen

42. What is the sum of pH and pOH in aqueous solution at 25°C? – 14

43. By what factor is a solution with pH = 2 more acidic than one with pH = 6 ? – 104

44. Red litmus paper is changed into blue in solution of which thing? – Base

45. What is formed by dissolution of base or acid in water? – Exothermic

46. Blue litmus paper is converted into red in solution of which thing? – acid

47. According to Arrhenius theory of an acid and base, an acid is a substance that gives which ions in water? – H+ ions

48. What is the negative logarithmic value of hydrogen on called? – pH

49. What are the physical state of dispersion medium of a cloud ? – Gas . Vander Wall s equation explains the behaviour of which gases? – real gases

51. In general gas equation, pV= nRT, V is the volume of which gas? – n mole of a gas

52. What is the ratio of rate of diffusion of oxygen and hydrogen? – 1 : 4

53. Absolute zero is the temperature where all gases are expected to have howmuch volume? – Zero volume

54. 4.4 g of CO2 contains how many litre of CO2 at STP? – 2.24 litre

55. Glucose or fructose is converted into C2H5OH in the presence of which thing? – zymase

56. Which type of materials act as effective catalysis? – Transition metals

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57. What is the substance which decreases the rate of a chemical reaction? – Poison

58. TEL minimise the knocking effect when mixed with petrol, how does it act? – As negative catalyst

59. Which is the catalyst used in the manufacture of sulphuric acid by contact process? – V2O5

60. Which catalyst is sensitive to temperature changes? – Enzyme

61. Which is the temperature at which the catalytic activity of the catayist is maximum? – Optimum

temperature

62. Alcoholic fermentation is brought about the action of which thing? – Yeast . Which is catalyst used in the Deacon s process for the manufacture of chlorine? – CuCl2 . In the Ostwald s process for manufacture of HNO , which catalyst is used? – Pt

65. Which gas has maximum colorific value? – Oil gas

66. When ammonium chloride is dissolved in water, the solution becomes cold. Whiat is change? –

Endothermic

67. When ice melts into water, which type of change occurs in entropy? – Increases

68. In which type of coal percentage of carbon is the highest? – Anthracite

69. What is the mixture of carbon monoxide and nitrogen called? – Producer gas

70. What is the mixture of carbon monoxide and hydrogen called? – Water gas

71. Which law of thermodynamics introduces the concept of entropy? – Second law

72. For which element, the standard enthalpy is not zero? – C (Diamond)

73. Which fuel causes minimum environmental pollution? – Hydrogen

74. Which gas has the highest fuel value? – Hydrogen

75. The compound with negative heat of formation is known as which name? – Exothermic compound

76. Which hydrocarbon is mainly present in gobar gas? – Methane

77. What happens when the door of a refrigerator is kept open? – Room heated

78. What does the second law of thermodynamics introduced? – The concept of Entropy

79. What is an extensive property of the system? – Volume

80. A gas expands isothermally and reversible. How much work is done by the gas? – Maximum

81. About which is the information not conveyed by thermodynamics? – Rates of reactions

82. Which is the element that has the highest first ionization potential? – Nitrogen

83. What has the highest ionization potential? – Ne

84. Which of the following among alkali metals is most reactive? – Cs

85. Which is the element having lowest melting point in periodic table? – He

86. Which are the elements on the right side of the periodic table? – Non-metals

87. Which transition metal is in liquid state? – Mercury

88. Which electronic configurations exhibits metallic character? – 2, 8, 2

89. Which element has the lowest electron affinity? – Argon

90. By whom was the calculation of electronegativities first done? – Pauling

91. Which element does not exist in liquid state at room temperature ? – Na

92. What is the most electropositive amongst the alkaline earth metals? – Barium

93. Which block of elements is mostly metals with high B.P., M.P. values? – d-block

94. Which are the vertical lines in modern periodic table called? – Group

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95. What is horizontal line in modern periodic table called? – Period

96. In a period, the elements are arranged in which order? – Increasing charges in the nucleus

97. Which noble gas does not have octet of electrons in its outer shell? – He

98. Which pair of elements is in the same period of the periodic table? – Na, Cl

99. Why is the electron affinity of chlorine highest than that of fluorine? – Smaller nuclear charge

100. What is the Electron affinity of noble gases? – Almost zero

One liner Gk 100:

1. Which mirror is to be used to obtain a parallel beam of light from a small lamp ? – Concave mirror

2. The focal length of the lens in a photographic camera is 5 cm. What is the power of the lens? – + 20 D

3. When viewed in white light, why do soap bubbles show colours? – Because of interference

4. Angular separation between two colours of the spectrum depends upon which thing? – Angle of deviation

5. Total internal reflection of light is possible when light enters from which thing? – Water to air

6. Which is used to remove astigmatism for a human eye? – Cylindrical lens

7. Why does diffusion of light in the atmosphere take place? – Due to dust particles

8. Which phenomena can not be attributed to the refraction of light? – Redshift

9. Total internal reflection can take place when light travels from which thing? – Diamond to glass

10. The refractive index of a given piece of transparent quartz is greatest for which light? – Violet light

11. A virtual image larger than the object can be formed by which mirror? – Concave mirror

12. If there were no atmosphere, what will be the length of the day on the earth? – Decrease

13. The focal length of a convex lens is 50 cm. what is its power? – +2 D

14. For an astronaut in a space ship, how does the sky appear? – Black

15. Which phenomena is used in optical fibres? – Total internal reflection

16. What is the phenomenon of splitting white light into seven colours? – Dispersion

17. Critical angle is minimum when a light ray passes which thing? – Glass to air

18. If the angle between two plane mirrors is 60°; then how many number of image will be formed? – 5

19. In which part of the eye lies the pigment, that decides the colour of the eyes of a person? – Choroid

20. Critical angle of. light passing from glass to water is minimum for which colour? – Violet colour

21. To an observer on the lunar surface, during the day time, how will the sky appear? – Black

22. What is the unit of luminous efficiency of an electric bulb? – Lumen / watt

23. Which of light are strongly absorbed by plants? – Blue and red

24. A far-sighted person has a near point at 100 cm. What must be the power of the correcting lens? – +3.0 D

25. How many image can a man see if he stands between two plane mirrors inclined at an angle of 60°? – 5

26. How is image formed on the retina of a human eye? – Real and inverted

27. The resistance of material increases with temperature. What is this? – Metal

28. When do all the magnetic materials lose their magnetic properties? – Strongly heated

29. What is the relative permeability of a paramagnetic material? – Greater than unity

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30. A soap bubble is given negative charge then what happen in its radius? – Increases

31. How is the relative permeability of a diamagnetic material? – Less than unity

32. How are the magnetic field lines in the middle of a solenoid? – Parallel to the axis

33. Why do Electricians use rubber gloves while working? – Rubber is an insulator

34. What work is work done in moving a positive charge on an equipotential surface? – Zero . Kirchhoff s voltage law is based on the law of conservation of which thing? – Energy

36. Why is In a hydel station the motion produced in turbines? – Due to the flow of water

37. What is most suitable for the core of an electromagnet? – Soft iron

38. At a grid sub stations the voltage is stepped up to reduce loss of which thing? – Power

39. Equal charges are given to two spheres of different radii. What will the potential be? – More on smaller

sphere

40. Two electron beams are travelling parallel to each other. What will be their reactions? – Repel each

other

41. Instrument used to store the electric charge is known by which name? – Capacitor

42. When an ebonite rod is rubbed with fur, which charge acquired by the fur? – Positive

43. Conversion of chemical energy into electrical energy occurs in which thing? – Battery

44. What is the temperature at which a ferromagnetic material becomes paramagnetic? – Curie temperature

45. A magnetic needle is kept in non uniform magnetic field. What does itexperiences? – A force and a

torque

46. Where will be the Time period in a vibration magnetometer infinite? – At magnetic pole . The north pole of the earth s magnet is near the geographical which direction? – South

48. If the current in the core decreases, what will the strength of the magnetic field be? – Decreases

49. The intensity of a magnetic field is defined as the force experienced by which pole? – Unit north pole

50. If a material, placed in a magnetic field is thrown out of it, then how is the material? – Diamagnetic

51. The capacity of a pure capacitor is 1 farad. In D.C. circuit, what will its effective resistance be? – Infinite

52. If a bar magnet is cut length wise into 3 parts, what will the total number of poles be? – 6

53. For electroplating a spoon, it is placed in the voltameter at which postion? – The position of cathode

54. A substance, when inserted between the poles of a magnet, is pushed out, what is it? – Diamagnetic

55. By inserting a soft iron piece into solenoid, what does the strength of the magnetic field? – Increase

56. The magnetic induction associated with currents flowing in a hollow copper tube, how will be? – only

out side

57. How is the electric potential at the centre of a charged conductor? – Same as on the surface

58. What is not the cause of low conductivity of electrolyte? – Ionisation of salt

59. What is Electric field intensity at a point a hollow charged spherical conductor? – Is zero

60. Which property is processed by the ferromagnetic substance? – Hysterasis

61. Which type of cell can be used if a device requires 75 A of current for 15 seconds? – Lead-acid cell

62. A hydrogen atom is paramagnetic. What is a hydrogen molecule? – Diamagnetic

63. In nuclear fission, how many percentage of mass is converted into energy? – 0.1%

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64. X210 has half life of 5 day. What is the time taken for seven-eights of sample of X210 to decay? – 15 days

65. If a U-238 nucleus splits into two identical parts, how will the two nuclei be so produced? – Stable

66. What is the half-life of a radioactive element which has only 1/32 of its original mass left after a lapse of

60 days? – 12 days

67. If a proton of mass m is moving with the velocity of light, what will its mass be? – Infinite

68. What was the fissionable material used in the bomb dropped at Nagasaki (Japan) in the year 1945? –

Plutonium

69. Energy transferred to a person through gamma rays is measured in by which unit? – Roentgens

70. Which field is used to produce deflection in a television picture tube? – A magnetic fields

71. The electron emitted in beta radiation originates from where? – Inner orbits of atoms

72. From which the cathode ray particles originate in a discharge tube? – Cathode . Einstein s mass energy relation is given by which expression? – E = mc2

74. Which rays will deflect in electric field? – Cathode rays

75. What percentage of the original quantity of a radioactive material is left after five half lives

approximately? – 3% . What is the important conclusion given by Millikan s experiment about the charge? – Charge is

quantized

77. What are Alpha rays emitted from a radioactive substance? – Helium nuclear

78. Which are the Particles that can be added to the nucleus of an atom without changing its chemical

properties? – Neutrons

79. Which particle has similar mass to that of the electron? – Positron

80. When the speed of electrons increases, then what happens in the value of the specific charge on an

electron? – Decreases

81. The colour of the +ve column in a gas discharge tube depends on which thing? – The gas in the tube

82. The first explosion of an atomic device in India was carried out in which state? – Rajasthan

83. Direct conversion of solar energy with the use of photovoltaic cell results in the production of which

energy? – Electrical energy

84. Why is energy is continuously generated in the sun? – Due to nuclear fusion

85. What is the ratio of specific charges of an á-particle to that of a proton? – 1/2

85. Long distance short-wave radio broad casting uses which waves? – Ionospheric wave

86. Which satellite is used in ship-to-shore and shore-to-shore and shore-to-ship communication? – Marisat

87. Which is electrical circuits used to get smooth de output from a rectified circuit called? – Filter

88. When the temperature of semiconductor is increased, what will happen in its electrical conductivity? –

Increases

89. With the rise of temperature, what will happen in the specific resistance of semiconductor? – Decreases

90. The absorption of radio waves by the atmosphere depends on which thing? – Their frequency

91. Which are the space waves are affected seriously by atmospheric conditions? – UHF

92. With which can Radio wave of constant amplitude be generated? – Oscillator

93. What is the electrical circuit used to get smooth DC output from a rectifier circuit called? – Filter

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94. If germanium has to be doped with a donor impurity, how should the foreign atom be? – Pentavalent

95. In a p-type semiconductor, Which are the majority charge carriers? – Holes

96. The unidirectional property of a pn-junction is useful for its use as which thing? – Rectifier

97. Which energy of the electron at absolute zero is called? – Fermi energy

98. For television broadcasting, what frequency is employed normally? – 30-300 MHz

99. A zener diode is also a p – n junction diode. It can be used as which regular? – DC voltage regulator

100. Which effect shows particle nature of height? – Photoelectric effect

SET 1: 1. An eye defect which usually results from an unequal curvature of the cornea is–

(A) nearsightedness (B) astigmatism

(C) colour blindness (D) night blindness

Ans : (B)

2. The velocity of sound in air (under normal conditions) is–

(A) 30 m / sec (B) 320 m / sec

(C) 332 m / sec (D) 3,320 m / sec

Ans : (C)

3. A photo-electric cell converts–

(A) sound energy into electrical energy (B) light energy into electrical energy

(C) an electrical signal into sound waves (D) electrical energy into light energy

Ans : (B)

4. Which of the following sounds cannot be heard by human ear?

(A) 300 vibrations / sec (B) 1,000 vibrations / sec

(C) 10,000 vibrations / sec (D) 30,000 vibrations / sec

Ans : (D)

5. Exposure to sunlight helps a person improve his health because–

(A) the infra-red light kills bacteria in the body

(B) resistance power increases

(C) the pigment cells in the skin get stimulated and produce a healthy tan

(D) the ultraviolet rays convert skin oil into Vitamin D

Ans : (D)

6. Small amounts of iodine are necessary in our diet to–

(A) prevent pellagra

(B) compensate for underactivity of the thyroid gland

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(C) stimulate clotting of blood

(D) stimulate pituitary gland

Ans : (B)

7. On a sudden cardiac arrest, which of the following is advised as a first step to revive the functioning of

human heart ?

(A) Mouth to mouth resuscitation (B) Giving external cardiac massage

(C) Sprinkling water on the face (D) Giving cool water to drink

Ans : (A)

8. A triode differs from a diode in the way that–

(A) it can amplify a signal (B) it has vacuum inside

(C) it has a heated cathode (D) its current is caused by the photoelectric effect

Ans : (A)

9. Radioactive substances can be produces readily in–

(A) an electron gun (B) an atomic pile

(C) a transistor (D) a Wilson cloud chamber

Ans : (B)

10. The method of estimating the age of the crust of the earth, which is now believed to be the most

accurate, makes use of the rate of–

(A) accumulation of sedimentary beds (B) accumulation of salt in the ocean

(C) atomic disintegration (radio-activity) (D) loss of heat by the earth

Ans : (C)

11. When a given amount of air is cooled–

(A) the amount of moisture it can hold decreases (B) its absolute humidity decreases

(C) its relative humidity remains constant (D) its absolute humidity increases

Ans : (A)

12. With the present-day advancement in medical techniques, transplants are possible in all of the following

except–

(A) artery (B) bone

(C) cornea (D) kidney

Ans : (B)

13. The reaction which converts sugar solution into alcohol is a example of–

(A) saponification (B) hydrogenation

(C) fermentation (D) hydrolysis

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Ans : (C)

14. The Rh factor refers to–

(A) a protein substance found in the blood of some people

(B) a hormone carried by the blood

(C) the ratio of red corpuscles to white corpuscles in the blood

(D) a process that speeds up the clotting of blood

Ans : (A)

15. The greatest value of bees to mankind is in–

(A) supplying of food for birds

(B) insuring pollination of certain crop plants C storing honey for man s use

(D) furnishing beeswax needed in certain specialised industries

Ans : (B)

16. All of the following are examples of chemical changes except the–

(A) magnetising of iron (B) rusting of iron

(C) digestion of food (D) souring of milk

Ans : (A)

17. Cancer is a disease which–

(A) cannot be spread by those who have it

(B) is found only in human beings

(C) develops only in certain organs of the body

(D) is passed from generation to generation

Ans : (A)

18. The moon has no atmosphere because–

(A) no atmosphere has ever formed there

(B) the rocky surface completely absorbed the gases

(C) due to the low temperature, gases have condensed

(D) its gravitational pull is not strong enough to hold an atmosphere

Ans : (D)

19. When a moving bus stops suddenly, the passengers are pushed forward because of the–

(A) friction between the earth and the bus

(B) friction between the passengers and the earth

(C) inertia of the passengers

(D) inertia of the bus

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Ans : (C)

20. Which of the following is not an attribute of bacterium ?

(A) Ability to arise from non-living matter (B) Growth

(C) Reproduction (D) Respiration

Ans : (A)

SET 2:

1. Which of the following vitamins is helpful for coagulation of blood ?

(A) C (B) D (C) E (D) K

Ans : (D)

2. For purifying drinking water, alum is used–

(A) for coagulation of mud particles (B) to kill bacteria

(C) to remove salts (D) to remove gases

Ans : (A)

3. A weather balloon is not fully inflated on the ground because–

(A) if the balloon is fully inflated, it may not remain stable in a storm

(B) the air inside the balloon expands as it rises and may burst

(C) it cannot withstand the outside pressure if fully inflated

(D) None of these

Ans : (B)

4. Vitamin B12 is most useful for combating–

(A) anaemia (B) goitre

(C) night blindness (D) rickets

Ans : (A)

5. A transistor is most likely to be found in a–

(A) fuse (B) fluorescent lamp

(C) hearing aid (D) wrist watch

Ans : (C)

6. A person born with the inner ear missing–

(A) would not have the Eustachian tube

(B) would never be able to hear sound

(C) would be able to hear only with an electronic hearing aid

(D) could only hear a loud explosion

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Ans : (B)

7. The possibility of hereditary variation is greatest when–

(A) self-fertilisation occurs, as in some plants

(B) an abundant amount of food is provided for the egg

(C) organisms reproduce sexually

(D) organisms reproduce asexually

Ans : (C)

8. Steel is more elastic then rubber because–

(A) its density is high (B) it is a metal

(C) ratio of stress to strain is more (D) ratio of stress to strain is less

Ans : (C)

9. The chief purpose if crop rotation is to check the loss of topsoil–

(A) by water erosion (B) by wind erosion

(C) by weathering (D) pf its mineral content

Ans : (D)

10. Which of the following acts as a resistance against disease in the body ?

(A) Carbohydrates (B) Red corpuscles

(C) Vitamins (D) White corpuscles

Ans : (D)

11. What is function of a dynamo ?

(A) To convert heat energy into light energy

(B) To convert light energy into heat energy

(C) To convert mechanical energy into electrical energy

(D) To convert electrical energy into mechanical energy

Ans : (C)

12. The chief constituent of Gobar Gas is–

(A) ethane (B) methane

(C) hydrogen (D) carbon dioxide

Ans : (B)

13. Who is credited with the development of polio vaccine ?

(A) Linus Pauling

(B) Jonas Salk

(C) Melvin Calvin

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(D) Selman Waksman

Ans : (B)

14. Which one of the following statements regarding sound is true ?

(A) It travels at its greatest speed in vacuum.

(B) It produces transverse vibrations in the medium in which it travels.

(C) Its source is always a vibrating material.

(D) It cannot travel through liquids.

Ans : (C)

15. The clear sky looks blue because of–

(A) reflection of light (B) refraction of light

(C) diffraction of light (D) dispersion of light

Ans : (D)

. Which of the following in the human body is popularly called the Adam s Apple ?

(A) Adrenal (B) Liver

(C) Thyroid (D) Thymus

Ans : (C)

17. Which one of the following substances is obtained by the fractionation of human blood ?

(A) Antivenom serum (B) Gamma globulin

(C) Polio vaccine (D) Diphtheria antitoxin

Ans : (B)

18. Of the blood groups A, B, AB and O, which one is transfused into a person whose blood group is A ?

(A) Group A only (B) Group B only

(C) Group A and O (D) Group AB only

Ans : (C)

. The three abundant elements in the earth s crust are aluminium, oxygen and silicon. The correct order of their abundance is–

(A) oxygen, aluminium, silicon (B) aluminium, silicon, oxygen

(C) oxygen, silicon, aluminium (D) silicon, oxygen, aluminium

Ans : (D)

20. Penicillin is widely used as–

(A) an antiseptic (B) a disinfectant

(C) an antibiotic (D) an insecticide

Ans : (C)

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SET 3:

1. If force is expressed in newton and the distance in meter, then the work done is expressed in–

(A) Joule

(B) Kg wt

(C) Kg wt m

(D) Watt

Ans : (A)

2. The Law of Natural Selection is associated with–

(A) Dalton

(B) Darwin

(C) Kepler

(D) Mendel

Ans : (B)

3. When cream is separated from milk–

(A) the density of milk increases

(B) the density of milk decreases

(C) the density of milk remains unchanged

(D) it becomes more viscous

Ans : (A)

4. The element of an electric stove is made of–

(A) copper

(B) aluminium

(C) magnalium

(D) nicrome

Ans : (D)

5. The red blood cells are formed in the–

(A) heart

(B) liver

(C) lymph nodes

(D) bone marrow

Ans : (D)

6. Wet-bulb and dry-bulb thermo-meters are used to determine–

(A) the minimum temperature at a place in any 24-hour period

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(B) relative humidity

(C) air pressure

(D) the maximum temperature at a place in any 24-hour period

Ans : (B)

. One of the isotopes of iodine has a half life of minutes. This information tells us that if we start with a

given quantity of the isotopes, 50 minutes later there will remain–

(A) one-fourth of the original amount

(B) approximately the same amount

(C) one-half of the original amount

(D) none

Ans : (A)

8. The most abundant element the earth s atmosphere is–

(A) carbon dioxide

(B) hydrogen

(C) oxygen

(D) nitrogen

Ans : (D)

9. Which of the following diseases is generally spread by fleas ?

(A) Small pox

(B) Tetanus

(C) Typhus

(D) Yellow fever

Ans : (D)

10. All of the following are plant products except–

(A) cork

(B) hemp

(C) silk

(D) linen

Ans : (C)

11. Which of the following colours has got the maximum refractive index for glass ?

(A) Blue

(B) Green

(C) Red

(D) Indigo

Ans : (C)

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12. For digestion of fat, bile is needed. This is secreted by the–

(A) stomach

(B) pituitary gland

(C) pancreas

(D) liver

Ans : (D)

13. Excessive secretion from the pituitary gland in children results in–

(A) increased height

(B) retarded growth

(C) weakening of bones

(D) None of the above

Ans : (A)

14. Weight of an object put in a satellite orbiting in space around the earth is–

(A) the same as on the earth

(B) slightly more then that on the earth

(C) less then that on the earth

(D) reduced to zero

Ans : (D)

15. Which of the following food articles contain only one of the five constituents of diet, viz., fasts,

carbohydrates, proteins, mineral salts and vitamins ?

(A) Bread

(B) Mongo

(C) Milk

(D) Sugar

Ans : (D)

16. In which of the following pairs, the two substances forming the pairs are chemically most dissimilar ?

(A) Sugar and paper

(B) Butter and paraffin wax

(C) Chalk and marble

(D) Charcoal and diamond

Ans : (B)

17. Primary rainbow is formed when light suffers–

(A) two internal refractions before emerging out of the drop

(B) one internal refraction before emerging out of the drop

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(C) no internal refraction

(D) either one or two internal refractions before emerging out of the drop

Ans : (B)

18. Astigmatism (for a human eye) can be removed by using–

(A) concave lens

(B) convex lens

(C) cylindrical lens

(D) prismatic lens

Ans : (C)

19. How can the spherical aberration of a human eye be corrected ?

(A) By using a cylindrical lens

(B) By using a plano-convex lens

(C) By using a thin lens

(D) None of the above

Ans : (B)

20. An electric bell is placed inside a bell jar which is connected to a vacuum pump. When the bell jar is

completely evacuated–

(A) no sound can be heard

(B) the loudness of the sound will remain unchanged

(C) the loudness of the sound will increase

(D) the loudness of the sound will decrease

Ans : (A)

SET 4:

1. Which of the following vitamins is stored in the liver ?

(A) Vitamin A

(B) Vitamin C

(C) Vitamin E

(D) Vitamin K

Ans : (A)

2. Which of the following is needed by a person suffering from diabetes ?

(A) Antibiotics

(B) Insulin

(C) Penicillin

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(D) Streptomycin

Ans : (B)

3. An element common to all acids is–

(a) oxygen

(b) hydrogen

(c) sulphur

(d) chlorine

Ans : (B)

4. Which of the following statements relating to sound and light is true ?

(A) Light is a form of kinetic energy, whereas sound is a form of potential energy.

(B) Light can be reflected but sound cannot be.

(C) Light travels faster in air than sound does.

(D) Sound travels in waves but light does not.

Ans : (C)

5. Friction can be reduced by changing over from–

(A) sliding to rolling

(B) rolling to sliding

(C) potential energy to kinetic energy

(D) dynamic to static

Ans : (A)

6. Which of the following is a physical change ?

(A) Oxidation

(B) Reduction

(C) Decomposition

(D) Sublimation

Ans : (D)

7. Pressure cooker cooks rice faster because–

(A) it always lets the steam escape

(B) high pressure crushes the hard covering of rice grains

(C) it does not let the heat energy escape easily

(D) high pressure raises the boiling point of water

Ans : (D)

8. The isotopes of an element contain the same number of–

(A) neutrons and protons

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(B) protons but different number of neutrons

(C) neutrons and protons but different number of electrons

(D) neutrons and electrons but different number if protons

Ans : (B)

9. The theory of inheritance of acquired characters was propounded by–

(A) Charles Darwin

(B) Gregor Mendel

(C) J. B. Lamarck

(D) Weismann

Ans : (C)

10. Which one of the following is not allied to Geophysical Sciences ?

(A) Hydrology

(B) Meteorology

(C) Palaeontology

(D) Seismology

Ans : (C)

11. Brain of a normal human adult weighs about–

(A) 1 lb

(B) 2 lb

(C) 3 lb

(D) 4 lb

Ans : (C)

12. Photophobia is–

(A) a disease caused by too much sunlight

(B) abnormal intolerance of light

(C) the adjustment of the eye for light

(D) the ability to perceive light

Ans : (B)

13. Which one of the following elements is least likely to be found in commercial fertilisers ?

(A) Nitrogen

(B) Phosphorus

(C) Potassium

(D) Silicon

Ans : (D)

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14. Lime is sometimes applied to soil in order to–

(A) increase the alkalinity of the soil

(B) increase the acidity of the soil

(C) restore nitrates to the soil

(D) make the soil more porous

Ans : (A)

15. An element found in all organic compounds is–

(A) oxygen

(B) calcium

(C) nitrogen

(D) carbon

Ans : (D)

16. Most commonly used bleaching agent is–

(A) alcohol

(B) carbon dioxide

(C) chlorine

(D) sodium chloride

Ans : (C)

17. In which season do we need more fast ?

(A) Rainy season

(B) Spring

(C) Winter

(D) Summer

Ans : (C)

18. Which out of the following organs dies not eliminate waste products from the body ?

(A) Large intestine

(B) Liver

(C) Kidney

(D) Skin

Ans : (A)

19. Superconductivity is a phenomenon in which the resistance of a substance–

(A) increases with temperature

(B) decreases with temperature

(C) does not change with temperature

(D) becomes zero at very low temperature

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Ans : (D)

20. Liquids transmit pressure equally in all directions. This is known as–

(A) Boyle-Pascal s Law B Pascal s Law C Archimedes Principal (D) None of the above

Ans : (B)

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