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Give two chemical tests to distinguish b...

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

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Benzoic acid gives a brisk effervescene with saturated `NaHCO_(3)` solution but benzaldehyde fails to respond to this test.
`underset("Benzoic acid")underset()(C_(6)H_(5)COOH)+NaHCO_(3)rarrunderset("Sod. benzoate")underset()(C_(6)H_(5)COONa)+H_(2)O+underset("effervesence")underset("Brisk")underset()(CO_(2))`
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