When a chips packet is opened and is exposed to air, its taste and odour changes. This is an example of -

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Corrosion

Rancidity

Decomposition

None of these.

answer is B.

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Detailed Solution

Concept- Unpleasant odour or flavour is a sign of rancidity, a state brought on by the aerial oxidation of unsaturated fat found in food and other items.
Food that has spoiled to the point where it is unpalatable and unsafe to consume is said to be rancid. The short-chain aldehydes and ketones that are produced during the hydrolysis or autoxidation of lipids have an unpleasant flavour and smell.
Unwanted flavours and odours can develop when food becomes rancid. But occasionally, the flavours might be appealing (as in aged cheeses).
Thus, when a chips packet is opened and is exposed to air, its taste and odour changes is an example of rancidity.
Hence, the correct option is (2).

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