JEE PYQ: Aldehydes And Ketones Question 3
Question 3 - 2021 (18 Mar Shift 2)
In Tollen’s test for aldehyde, the overall number of electron(s) transferred to the Tollen’s reagent formula $[\text{Ag(NH}_3)_2]^+$ per aldehyde group to form silver mirror is ____. (Round off to the Nearest integer)
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Answer: 2
Solution
$\text{R-CHO} \to \text{R-COOH}$ involves loss of $2e^-$. Each $[\text{Ag(NH}_3)_2]^+$ gains $1e^-$ to form Ag. Total $2e^-$ transferred per aldehyde group to reduce 2 Ag$^+$ ions.
BETA
