The mechanism of the following reaction is: 2NO (g) + 2H 2 …

Chemistry Chemical Kinetics General Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 14, 2026

The mechanism of the following reaction is:

2NO (g) + 2H 2 (g) ⎯→ N 2 (g) + 2H 2 O(g)

Step1 : 2NO (g) + H 2 (g) N 2 + H 2 O 2

Step2 : H 2 O 2 + H 2 2H 2 O

Rate = k [NO] 2 [H 2 ] 2

Rate = k [H 2 O 2 ] [H 2 ]

On doubling the concentration of H 2 , keeping the concentration of NO constant, the rate will become double

If the initial concentration of H 2 and NO is C o and after time "t" the concentration of N 2 is x then Rate = k (C o – 2x) 2

Text Solution

Verified by Experts

The correct answer is:

r.d.s. is step 1.

r = k [NO] 2 [H 2 ]

∴ On doubling the concentration of H 2 without changing the concentration of NO, the rate will become double.

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