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)
Mercy Ndum
July 17, 2023
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Mercy
July 17, 2023
Very interesting
Love
October 10, 2023
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Muluh Nobert khan
December 1, 2023
Thanks
Ed babe
January 15, 2024
Hum
wapali
February 4, 2024
meh it's okay
Bless
February 23, 2024
Do you have speco 2024
Haaland
March 4, 2024
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Eli minks
March 4, 2024
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L
March 20, 2024
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Lesly
March 20, 2024
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Ramah
May 17, 2024
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Ramah
May 17, 2024
Amazing 😍😍
Angella
May 31, 2024
No paper 2for north west mock
pleroma
August 8, 2024
where are the answers