REVISION SHEET
Third Term Exam
2023 - 2024
SUBJECT: Chemistry
GRADE: 7 - Knightsbridge
Q.1 Chemical reactions:
a. What is the chemical name for rust?
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b. In which tube will the nail go rusty?
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c. How do the conditions in the tube C prevent air reaching the iron nail?
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Q.2 Answer the following questions:
a. Which property of sodium and potassium is not typical of a metal?
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b. Write a word equation for the reaction between sodium and oxygen.
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c. Name three metals that do not react with water.
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d. If an element is said to be inert, what does it mean?
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e. Write word equation between zinc and nitric acid.
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Q.3 Energy changes:
Burning is a chemical reaction where thermal energy is given out to the surroundings.
Marcus has four fuels to investigate to find out which gives out most thermal energy
to the surroundings. He uses apparatus like this:
a. Which variable will Marcus change?
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b. Name two variables Marcus must keep the same.
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c. Name one safety precaution he should take whilst carrying out this investigation.
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