Question

Silver mirror test is given by

• A. amines
• B. alcohols
• C. carboxylic acids
• D. aldehydes

Answer 1

Answer: (D)

Tollens reagent is a chemical reagent used to determine the presence of an aldehyde or $\alpha$-hydroxy ketone functional groups. A positive test with. Tollens, reagent is indicated by the precipitation of elemental silver, often producing a characteristic silver mirror on the-inner surface of the reaction vessel.
$RCHO+2{\left[Ag{\left(N{H}_3\right)}_2\right]}^{+}+3O{H}^{-}\stackrel{\Delta }{\to }$
$RCO{O}^{-}+\underset{\text{Silver mirror}}{2Ag}\downarrow +4N{H}_3+2H_{2}O$