Give an example of a chemical reaction for each of the following situations:
(a) A change in colour is observed.
(b) A gas is evolved.
(c) Sound is produced.

(a) Reaction between copper sulphate and iron metal – blue solution of copper sulphate changes to green solution of ferrous sulphate.
(b) Reaction between Sodium hydrogen carbonate and acetic acid – carbon dioxide gas is evolved.
(c) Burning of crackers produces a loud sound.

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Updated on: 01-Feb-2023

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