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JEE Main202118 Mar 2021Evening ShiftChemistryAldehydes and KetonesActual

In Tollen's test for aldehyde, the overall number of electron(s) transferred to the Tollen's reagent formula Ag NH 3 2 + per aldehyde group to form silver mirror is ___.(Round off to the Nearest integer)

Correct answer

0

Step-by-step solution

AgNO 3 + NaOH → AgOH + NaNO 3 2 AgOH → Ag 2 O + H 2 O Ag 2 O + 4 NH 3 + H 2 O → 2 Ag NH 3 2 + + 2 O ⊝ H Tollens' reagent is an alkaline solution of ammoniacal silver nitrate and is used to test for aldehydes. Tollens' test, also known as silver-mirror test, is a qualitative laboratory test used to distinguish between an aldehyde and a ketone. It exploits the fact that aldehydes are readily oxidized (see oxidation), whereas ketones are not.

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