Consider the following two reactions A and B . (A) (see structure) (B) (see structure)
Numerical value of [molar mass of x+ molar mass of y ] is ______。AB
(A)4
(B)88
(C)46✓ Correct
(D)160
Answer: (C)
Solution
Sodium reacts with the acidic −OH of phenol to give sodium phenoxide and hydrogen, so the gas x is H2 with molar mass 2gmol−1. Benzoic acid, being a carboxylic acid, reacts with NaHCO3 to give sodium benzoate, water and carbon dioxide, so the gas y is CO2 with molar mass 44gmol−1. The sum of the two molar masses is 2+44=46gmol−1.
JEE Main · 2026 · 24 Jan 2026 · Shift 1 · Single correct option