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Question
When a solution is added to a cloth strip treated with onion extract, then the smell of onion cannot be detected. State whether the given solution contains an acid or a base.
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Solution
The given solution contains a base. Onion acts as an olfactory indicator. While its distinct, pungent smell remains largely unaffected when it comes into contact with an acid, adding a basic solution destroys or neutralises the sulphur compounds that cause the odour, making the cloth strip completely odourless.
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