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Chemistry Past Questions and Answers

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Chemistry Questions

Question 26:

An example of an alcohol is

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A A.CCl<sub style='font-size: smaller;'>4</sub>
B B.CH<sub style='font-size: smaller;'>3</sub>COOH
C C.CHCl<sub style='font-size: smaller;'>3</sub>
D D.C<sub style='font-size: smaller;'>2</sub>H<sub style='font-size: smaller;'>6</sub>
E E.CH<sub style='font-size: smaller;'>3</sub>OH

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Question 27:

The nucleus of an atom contains

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A Protons only
B Neurons only
C Protons and electrons
D Neutrons and electrons
E Protons and neutrons

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Question 28:

Hypochlorous acid is used as a bleach because

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A It is a strong acid
B It yields chlorine readily in pure water
C It is an oxidising agent
D It is a weak acid
E It is a reducing agent

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Question 29:

The normal boiling point of a liquid is defined as

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A The temperature at which its vapour pressure equals the atmospheric pressure
B The temperature at which bubbles begin to form
C The temperature at which the vapour pressure equals 1 temperature
D The temperature at which the rate of condensation of vapour equals the rate of vaporisation of the liquid
E The temperature at which the space above the liquid is saturated

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Question 30:

Which of the following compounds will form a solution if exposed to air?

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A A.Na<sub style='font-size: smaller;'>2</sub>CO<sub style='font-size: smaller;'>3</sub>.10H<sub style='font-size: smaller;'>2</sub>O
B B.NaNO<sub style='font-size: smaller;'>3</sub>
C C.CuSO<sub style='font-size: smaller;'>4</sub>
D D.CaCl<sub style='font-size: smaller;'>2</sub>
E E.Na<sub style='font-size: smaller;'>2</sub>SO<sub style='font-size: smaller;'>4</sub>.10H<sub style='font-size: smaller;'>2</sub>O

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