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AQA GCSE CHEMISTRY- UNIT 5 QUESTIONS WITH CORRECT ANSWERS 2026

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AQA GCSE CHEMISTRY- UNIT 5 QUESTIONS WITH CORRECT ANSWERS 2026

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AQA BUSINESS
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AQA GCSE CHEMISTRY- UNIT 5 QUESTIONS
WITH CORRECT ANSWERS 2026
exothermicBreaction - CORRECT ANSWER - X5 X5 X5 X5




a chemical reaction that releases energy to its surroundings (usually by heating)
X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5




Examples of exothermic reactions - CORRECT ANSWER --Burning fuels ( combustion)
X5 X5 X5 X5 X5 X5 X5 X5 X5 X5




- Neutralisation reactions X5




- Oxidation reactions X5




Everyday uses of exothermic reactions - CORRECT ANSWER -- Hand warmers
X5 X5 X5 X5 X5 X5 X5 X5 X5 X5




- self heating cans X5 X5




What happens when a chemical reaction occurs ? - CORRECT ANSWER -
X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5




Energy is transferred to or from the surroundings
X5 X5 X5 X5 X5 X5 X5 X5




What happens to the amount of energy in the universe ? - CORRECT ANSWER -It always stays the same
X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5




endothermic reaction - CORRECT ANSWER - X5 X5 X5 X5 X5




ABreaction that takes in energy from the surroundings. Shown by fall in temperature.
X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5




Examples of endothermic reactions - CORRECT ANSWER --
X5 X5 X5 X5 X5 X5 X5




reaction between citric acid and sodium hydrogencarbonate
X5 X5 X5 X5 X5 X5 X5




- Thermal decomposition X5




Everyday uses of endothermic reactions - CORRECT ANSWER -- sport injury packs
X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5




How can the amount of energy released in a reaction be reduced ? - CORRECT ANSWER --
X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5




by putting the polystyrene cup in cotton wool for insulation
X5 X5 X5 X5 X5 X5 X5 X5 X5 X5




- by putting a lid on the cup to reduce energy lost by evaporation
X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5 X5
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