cameroon gce O level June 2023 chemistry 2

cameroon gce O level June 2023 chemistry 2

cameroon gce O level June 2023 chemistry 2

SECTION C
ANSWER 2 QUESTIONS OUT OF 3. If you attempt more than 2 questions, only the first two will be
considered. Where appropriate, equations and diagrams should be used to illustrate your answer. Write your answers
on the sheets that follow Section C.
8
. Using suitable examples and balanced chemical equations, write short notes on each of the following reaction types
in Chemistry.
(
a) Thermal decomposition
(
b) Neutralization reaction
(
c) Addition polymerization
(
d) Substitution reaction
i
(5, 5, 5, 5 marks)
9. (a) Describe an experiment that is used to determine the enthalpy of combustion of ethanol in the laboratory. Your
description should end with collection of data.
(b) In one of such experiments, when 0.4g of ethanol was burnt, the temperature of 200cm3 of water was raised from
25.2
°C to 50.0°C. Determine the enthalpy of combustion. . (16, 4 marks)
10. You are given the following equation
CaC03(S) + 2HCI
(a) List any three (3) factors that affect the rate of this reaction.
(b) Describe the effect of change of each of the factors on the reaction rate.
(c ) Name the equipment that can be used to record the volume of carbon dioxide evolved over an interval of
time.
>
CaCl2(aq) + C02(g) + H 20(|)(»q)
(3, 15, 2 marks)

PDF is loading please wait...


15 comments on “cameroon gce O level June 2023 chemistry 2

Leave a comment

Your email address will not be published. Required fields are marked *

Download our application
kawlo
sponsors Ads