QJEEM20Ch9737: JEE Main 2020 Chemistry - Class 12 JEEM20Ch9737 Solution: Consider the following reactions : N a C l + K 2 C r 2 O 7 + H…

Question

Verified Solution • 2025–26 Session moderate

Consider the following reactions :

N a C l + K_{2} C r_{2} O_{7} + \underset{(c o n c .)}{H_{2} S O_{4}}

\to

(A) + side products

(A) + NaOH

\to

(B) + Side products

(B) + \underset{(d i l u t e)}{H_{2} S O_{4}} + H_{2} O_{2}

\to

(C) + Side products

The sum of the total number of atoms in one molecule each of (A) and (B) and (C) is

Accepted Answer

N a C l + K_{2} C r_{2} O_{7} + \underset{(c o n c .)}{H_{2} S O_{4}}

\to

2CrO₂Cl₂(A) + 4NaHSO₄ + 2KHSO₄ + 3H₂O

CrO₂Cl₂(A) + 4NaOH

\to

Na₂CrO₄(B) + 2NaCl + 2H₂O

Na₂CrO₄(B) + 2H₂SO₄ + 2H₂O₂

\to

CrO₅(C) + 2NaHSO₄ + 3H₂O

A = CrO₂Cl₂

B = Na₂CrO₄

C = CrO₅

Total number of atom in A + B + C = 18

Step-by-Step Verified Solution