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CBSE Class 10th Science Solved Practice Paper 2015 Set 2
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CBSE Class 10th Science Solved Practice Paper 2015 Set 2
The Practice Paper is a product of CBSE Class 10th Exam experts of jagranjosh.com, an online educational portal of Dainik Jagran.After a round analysis for the previous three years of CBSE Class 10th Summative Assessment – II Science Question papers, the jagranjosh.com experts have set this Practice Paper for the 2014 CBSE Class 10th Summative Assessment – II. An analysis of Previous Years Science Question Papers has been mentioned here:
PREFACEPREFACE
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CBSE Class 10th Science Solved Practice Paper 2015 Set 2
Below are the Chapters covered under the entitled units:
This conceptual Practice Paper along with guided solutions is a product exclusively for CBSE Class 10th students. The pattern of the Practice Paper is as per the Previous Year’s CBSE Summative Assessment – II, Science Question Papers, thus the students will find it easy and understandable in all its aspects.
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CBSE Class 10th Science Solved Practice Paper 2015 Set 2
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Free Checklist for the Year 2015 for Class 10th Science:
• Syllabus• Chapter-wise Tips & Strategy• Chapter-wise NCERT Solution• Chapter-wise Online Test• Sample Paper• Solved Practice Paper• Solved Guess Paper• Guess Paper• Stress Management• What After Class 10th
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CBSE Class 10th Science Solved Practice Paper 2015 Set 2
“Section – A”
Q 1. Name the scientist who gave the theory of evolution.
Q 2. Write the full form of CFC.
Q 3. How many groups and periods are there in the modern periodic table?
Solved Practice PaperClass: X
Subject: ScienceSet -2
Time Allowed: 3Hours Maximum Marks: 90
General Instructions:
a) All questions are compulsory.b) The question paper comprises of two sections, A and B. You are to attempt both the sections.c) Questions 1 to 3 in section A are one mark questions. These are to be answered in one word or in one
sentence.d) Questions 4 to 6 in section A are two marks questions. These are to be answered in about 30 words each.e) Questions 7 to 18 in section A are three marks questions. These are to be answered in about 50 words
each.f) Questions 19 to 24 in section A are five marks questions. These are to be answered in about 70 words
each.g) Questions 25 to 27 in section B are 2 marks questions and Questions 28 to 36 are multiple choice ques-
tions based on practical skills. Each question of multiple choice questions is a one mark question. You are to select one most appropriate response out of the four provided to you.
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CBSE Class 10th Science Solved Practice Paper 2015 Set 2
Q 4. Given below is a group of the periodic table.
As we move vertically downward from Li to Fr:
(a) What happens to the size of atoms?
(b) What happens to their metallic character?
Q 5. What is the name of the asexual reproduction method in:
(i) Spirogyra, and (ii) Leishmania?
Q 6. What is the atomic number of the elements X and Y having the electronic configurations 2, 8, 1 and 2, 8, 17 respectively? Also name the two elements.
Q 7. A concave mirror produces three times magnified real image of an object placed at 10 cm in front of it. Calculate the distance of the image from the mirror.
Q 8. What changes take place in the shape of eye-lens:
a) When the eye is focused on a near object?
b) When the eye is focused on a distant object?
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CBSE Class 10th Science Solved Practice Paper 2015 Set 2
Q 9.
a) What is ten percent law?
b) How much energy will be available to hawks in the food chain comprising hawk, snake, mice, and paddy, if 10,000 J of energy is available to paddy from the sun?
Q 10. Write the chemical equation to represent each of the following types of reactions of organic com-pounds:
a) Addition reaction.
b) Esterification.
c) Saponification.
Q 11. Can you name the phenomenon depicted in the diagram?
Also, explain the reason behind the separation of different colours of white light on passing through the glass prism.
Q 12. What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
Q 13. What are homologous organs? Illustrate with suitable examples how the process of evolution is re-lated to homologous organs?
Q 14. The following diagram shows a part of the periodic table containing 2nd and 3rd periods in which five elements have been represented by the letters A, B, C, D, and E.
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CBSE Class 10th Science Solved Practice Paper 2015 Set 2
i) Select the letter which represents an alkali metal.
ii) Out of D and E, which element has the bigger radius and why?
iii) What type of bond is formed between A and C?
iv) Select the letter which represents a noble gas.
v) Which letter represents the element that will form only covalent compounds?
Q 15.
a) What is a homologous series? Write its characteristics.
b) Among the following, select the hydrocarbons which are members of the same homologous series. Also give the name of each series.
C5H10; C3H8; C6H10; C4H10; C7H12; C8H16
Q 16.
a) What is meant by ‘refraction of light’?
b) Draw a labelled ray diagram to show the refraction of a ray of light passing through a rectangular glass block. Mark the points where the refraction of light takes place. What can you say about the final direction of ray of light?
Q 17. A student while observing the image formation by a concave mirror by placing an object at different distances from the mirror recorded a set of observations in a tabular form as given below:
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CBSE Class 10th Science Solved Practice Paper 2015 Set 2
i) Using this data calculate the focal length of the mirror.
ii) Which of the readings is incorrect and why?
iii) Draw the ray diagram of the image formation using any one of the correct readings.
Q 18. The male to female ratio in our country is continuously getting imbalanced. What do you think is the reason behind the same? What steps do you suggest to improve the situation?
Q 19.
a) The diagram shows the germination of pollen grains in a flower. Name the parts labelled as A, B, C, D, E, and F.
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CBSE Class 10th Science Solved Practice Paper 2015 Set 2
b) Define the term pollination.
c) State the difference between self-pollination and cross-pollination.
Q 20.
a) What is short-sightedness or myopia? State the two causes of short-sightedness. Also, with the help of ray diagram, show:
i) The eye defect ‘short-sightedness.’
ii) Correction of short-sightedness by using a lens.
b) A short-sighted person has a far point of 90 cm. To correct this defect what should be the focal length of the lens used by the man?
Q 21.
a) An organic acid X having the molecular formula CH4O2 is a liquid which often freezes during winter time in cold countries. On warming it with methanol in the presence of a few drops of concentrated sulphuric acid, a compound Y with a sweet smell is formed.
i) Identify X and Y. Also write their formulae showing the functional group present on them.
ii) Write the chemical equation for the reaction involved.
b) Complete the following equations:
Q 22. Which lens can be used as a magnifying glass? For which position of the object the convex lens forms:
i) A virtual and erect image?
ii) A real and inverted image of same size as that of the object?
iii) Draw the ray diagrams to show the formation of required image in each of the above two cases.
CBSE Class 10th Solved SciencePractice Paper 2015 (Set-II)
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