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Question

When liquid A is treated with a freshly prepared ammonical silver nitrate solution, it gives bright silver mirror. The liquid forms a white crystalline soild on treatment with sodium hydrogensulphit. Liquid B also forms a white crystalline solid with sodium hydrogensulphite but it does not give test with ammoniacal silver nitrate. Which of the two liquids is aldehyde? Write the chemical equations of these reactions also.

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Solution

Liquid B must be ketone because it does not react with ammonical silver nitrate but react with NaHSO3.
Liquid A must be Aldehyde because it react with both NaHSO3 and ammonical silver nitrate.
RCHO+2[Ag(NH3)2]NO3+2NH4OHRCOOH+2AgH2O+4NH3+2NH4NO3

1037972_1120641_ans_ae68d8ede6254e1c9ee81291a8bca552.PNG

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