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  • When liquid ‘A’ is treated with a freshly prepared ammoniacal silver nitrate solution, it gives bright silver mirror. The liquid forms a white crystalline solid on treatment with sodium hydrogen sulphite.

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

Answers (1)

Since liquid A forms a bright silver mirror when treated with ammoniacal \mathrm{AgNO}_3 solution it is an aldehyde.
In the same way, liquid ‘B’ must be a methyl ketone for it does not give a test with ammoniacal \mathrm{AgNO}_3 solution.

Chemical equations for these reactions are :

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