AQA GCSE CHEMISTRY - CHEMICAL CHANGES QUESTIONS WITH CORRECT ANSWERS 2026

AQA GCSE CHEMISTRY - CHEMICAL CHANGES
QUESTIONS WITH CORRECT ANSWERS 2026
Oxidation - CORRECT ANSWER -Loss of electrons



Reduction - CORRECT ANSWER -Gain of electrons



Displacement reaction - CORRECT ANSWER -
When a more reactive element takes the place of a less reactive element in a compound



Redox reaction - CORRECT ANSWER -A reaction where both oxidation and reduction occur



Acid - CORRECT ANSWER -Substance that produces hydrogen ions (H⁺) in water
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Alkali - CORRECT ANSWER -Substance that produces hydroxide ions (OH⁻) in water
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Strong acid - CORRECT ANSWER -An acid which is fully ionised (split into ions) in water
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Weak acid - CORRECT ANSWER -An acid in which only a few molecules are ionised
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Dilute - CORRECT ANSWER -A solution containing a small amount of dissolved solute
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Concentrated - CORRECT ANSWER -A solution containing a lot of dissolved solute
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Neutralisation - CORRECT ANSWER -Reaction between an acid and an alkali forming water.
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Ionic equation for neutralisation - CORRECT ANSWER -H⁺(aq) + OH⁻(aq) → H₂O(l)
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Acid + Base - CORRECT ANSWER -→ salt + water
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