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Chemistry Past Questions and Answers

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Chemistry Questions

Question 471:

Which of the following substance is a mixture?

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A Granulated sugar
B Sea-water
C Sodium chloride
D Iron fillings

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Question 472:

The general formula of an alkyl halide (where X represents the halide) is?

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A C<sub style='font-size: smaller;'>n</sub>H<sub style='font-size: smaller;'>2n</sub><sub style='font-size: smaller;'>2</sub>X
B C<sub style='font-size: smaller;'>n</sub>H<sub style='font-size: smaller;'>2n</sub> + <sub style='font-size: smaller;'>1</sub>X
C C<sub style='font-size: smaller;'>n</sub>H<sub style='font-size: smaller;'>2n</sub> + <sub style='font-size: smaller;'>2</sub>X
D C<sub style='font-size: smaller;'>n</sub>H<sub style='font-size: smaller;'>2n</sub>X

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Question 473:

Which of the following are made by the process of polymerization?

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A Nylon and soap
B Nylon and artificial rubber
C Soap and butane
D Margarine and nylon

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Question 474:

Starch can be converted to ethyl alcohol by?

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A Distillation
B Fermentation
C Isomerization
D Cracking

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Question 475:

The movement of liquid molecules from the surface of the liquid to the gaseous phase above it is known as?

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A Brownian movement
B Condensation
C Evaporation
D Liquefaction

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