Date post: | 22-Apr-2015 |
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QUIZ CONTEST
Question #1
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Which does not belong to the group?a. Boiling pointb. Flammabilityc. Hardnessd. Metallic Properties
ANSWER
b. FlammabilityAll are physical property except
flammability which is a chemical property.
Question #2
It is the ability of a material to be drawn into
wires.
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ANSWER
DuctilityAn example is copper.
Question #3
Which of the following has the highest melting point?
a. Iceb. Copperc. Butterd. Iron
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ANSWER
d. Iron – 1,535°CIce - 0°C
Copper – 1,083°CButter - 32°C
Question #4
Which of the following is a chemical property?
a. Crushing of stonesb. Burning of woodsc. Cracking an eggd. Boiling of water Time starts now...
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ANSWER
b. Burning of woodsPhase change is physical change.
Question #5Which does not belong to the group?
a. Salt solution (completely dissolved particles)
b. Oil and waterc. Alcohol and water
d. Sugar dissolved in waterTime starts now...
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ANSWER
b. Oil and waterAll are homogeneous mixture. Oil and
water is a heterogeneous mixture.
Question #6
It is a combination of two or more substances
that are physical combined. Time starts now...
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ANSWER
Mixture
Question #7Which does not belong to the group?
a. Nature of solute and solventb. Temperature
c. Pressured. Saturation point
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ANSWER
d. Saturation PointThe first three are factors affecting
solubility.
Question #8
This is the substance which is dissolved in the solvent.
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ANSWER
Solute
Question #9
It is a solution which contains solutes that do not dissolve anymore.
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ANSWER
Supersaturated Solution
Question #10
Which is an example of a gas in liquid?
a. Carbonated drinksb. Dental amalgam
c. Aird. Steel
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ANSWER
a. Carbonated Drinks
Question #11
Which of the following mineral is the hardest?a. Talc
b. Quartzc. Topaz
d. Diamond
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ANSWER
d. DiamondThe choices are arranged in
increasing hardness.
Question #12
Which of the following is not a method of separating the components of a mixture?
a. Filtrationb. Decantation
c. Stirringd. Evaporation
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ANSWER
c. Stirring
Question #13
It is a type of mixture that separates on standing.
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ANSWER
Suspension
Question #14
Which is not an example of emulsion?
a. Milkb. Whipped Cream
c. Face Creamd. Mayonnaise
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ANSWER
b. Whipped CreamIt is a foam.
Question #15
Which of the following is an example of sol?
a. Spray deodorantb. Colored gems
c. Bloodd. Butter
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ANSWER
c. BloodSpray deodorant is an aerosol. Colored
gems are solid sol. Butter is a solid emulsion.
Question #16
Compute for the percent by volume of 13mL of alcohol in 57mL of water.
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ANSWERSolution:
Volume of solution = 13 mL + 57mL= 70mL
%volume = (13mL/70mL) x 100
= 18.57%
Question #17
What is the percent by mass of 6.2g of alum dissolved in a 412.7mL of
water? (Note: 1mL = 1g)
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ANSWERSolution:Conversion: 412.7mL = 412.7gMass of solution = 6.2g + 412.7g
= 418.9%mass = (6.2g/418.9g) x 100
= 1.48%