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  4. Silver mirror test is given by which one of the following compounds?

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Q. Silver mirror test is given by which one of the following compounds?

Aldehydes Ketones and Carboxylic Acids

Solution:

All aldehydes including reducing sugar (as glucose, fructose) gives silver mirror test (with Tollens’ reagent)
$RCHO+2[Ag(NH_{3})_{2}]^{+} +3OH^{-} \xrightarrow{\Delta }$
$\underset{\text{Silver mirror}}{RCOO^{-}+2Ag} ↓ +4NH_{3}+2H_{2}O$
$(R=H, CH_{3})$
Thus, acetaldehyde and formaldehyde give silver mirror test