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Which of the following compounds will give silver mirror with ammoniacal silver nitrate? (A) Formic acid (B) Formaldehyde (C) Benzaldehyde (D) Acetone Choose the correct answer from the options given below:

1. C and D only
2. A, B and C only
3. A only
4. B and C only

Correct answer: A, B and C only

Solution

Formic acid, formaldehyde, and benzaldehyde can all reduce ammoniacal silver nitrate to form a silver mirror due to their aldehyde functional groups, which are capable of undergoing oxidation. Acetone, being a ketone, does not have this reducing capability.

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