AQA GCSE CHEMISTRY- UNIT 5 QUESTIONS WITH CORRECT ANSWERS 2026

AQA GCSE CHEMISTRY- UNIT 5 QUESTIONS
WITH CORRECT ANSWERS 2026
exothermicBreaction - CORRECT ANSWER -
a chemical reaction that releases energy to its surroundings (usually by heating)



Examples of exothermic reactions - CORRECT ANSWER --Burning fuels ( combustion)

- Neutralisation reactions

- Oxidation reactions



Everyday uses of exothermic reactions - CORRECT ANSWER -- Hand warmers
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- self heating cans
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What happens when a chemical reaction occurs ? - CORRECT ANSWER -
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Energy is transferred to or from the surroundings
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What happens to the amount of energy in the universe ? - CORRECT ANSWER -It always stays the same
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endothermic reaction - CORRECT ANSWER - X2 X2 X2 X2 X2




ABreaction that takes in energy from the surroundings. Shown by fall in temperature.
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Examples of endothermic reactions - CORRECT ANSWER --
X2 X2 X2 X2 X2 X2 X2




reaction between citric acid and sodium hydrogencarbonate
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- Thermal decomposition X2




Everyday uses of endothermic reactions - CORRECT ANSWER -- sport injury packs
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How can the amount of energy released in a reaction be reduced ? - CORRECT ANSWER --
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by putting the polystyrene cup in cotton wool for insulation
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- by putting a lid on the cup to reduce energy lost by evaporation
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