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Give two chemical tests to distinguish between benzaldehyde and benzoic acid.

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Give two chemical tests to distinguish between benzaldehyde and benzoic acid.
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(i) Benzoic acid will give brisk effervescence on reacting with sodium bicarbonate. Benzaldehyde will not react.
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(ii) Benzoic acid solution turns blue litmus red but benzaldehyde fails to respond to this test.
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