In Tollens test, aldehydes

Question

In Tollens test, aldehydes (A) are oxidised to acids (B) are reduced to alcohol (C) neither reduced nor oxidised (D) precipitate Ag+ as AgCl

Tardigrade Admin · Accepted Answer

When an aldehyde is heated with Tollens reagent, it oxidised to acids and latter is reduced to metallic silver, which deposits on the wall of test tube as bright silver mirror.

RC H O + Tollens reagent 2 [A g (N H_{3})_{2}]^{+} + 3 O H^{-} Heat

carboxylate ion RCO O_{2}^{-} + silver mirror 2 A g + 4 N H_{3} + 2 H_{2} O

Q. In Tollens test, aldehydes

are oxidised to acids

are reduced to alcohol

neither reduced nor oxidised

precipitate $A g^{+}$ as $A g Cl$