JEE Main 2019 Chemistry question

Chemistry Aldehydes, Ketones and Carboxylic Acids JEE Main 2019

In the following reaction: carbonyl compound + MeOH ⇌ acetal. Rate of the reaction is the highest for:

(A)Propanal as substrate and methanol in stoichiometric amount
(B)Propanal as substrate and methanol in excessCorrect
(C)Acetone as substrate and methanol in stoichiometric amount
(D)Acetone as substrate and methanol in excess

Answer: (B)

Solution

Aldehydes are more reactive than ketones, and excess methanol drives acetal formation.

Question ID VK-009779