Match List–I (Reaction) with List–II (Type of redox reaction). List–I (Reaction) List–II (Type of redox reaction) --- --- (A) N 2(g) + O 2(g) rightarrow 2NO(g) (I) Decomposition (B) 2Pb(NO 3) 2(s) rightarrow 2PbO(s) + 4NO 2(g) + O 2(g) (II) Displacement (C) 2Na(s) + 2H 2O(l) rightarrow 2NaOH(aq) + H 2(g) (III) Disproportionation (D) 2NO 2(g) + 2OH -(aq) rightarrow NO 2 -(aq) + NO 3 -(aq) + H 2O(l) (IV) Combination Choose the correct answer from the options given below:

(A)-(I), (B)-(II), (C)-(III), (D)-(IV)

(A)-(III), (B)-(II), (C)-(I), (D)-(IV)

(A)-(II), (B)-(III), (C)-(IV), (D)-(I)

Chemistry · Redox Reactions

JEE Main 2024 — 6 April, Shift 2 — Question 73

Match List–I (Reaction) with List–II (Type of redox reaction).

List–I (Reaction)	List–II (Type of redox reaction)
(A) $\mathrm{N_2(g) + O_2(g) \rightarrow 2NO(g)}$	(I) Decomposition
(B) $\mathrm{2Pb(NO_3)_2(s) \rightarrow 2PbO(s) + 4NO_2(g) + O_2(g)}$	(II) Displacement
(C) $\mathrm{2Na(s) + 2H_2O(l) \rightarrow 2NaOH(aq) + H_2(g)}$	(III) Disproportionation
(D) $\mathrm{2NO_2(g) + 2OH^-(aq) \rightarrow NO_2^-(aq) + NO_3^-(aq) + H_2O(l)}$	(IV) Combination

Choose the correct answer from the options given below:

Option A:
(A)-(I), (B)-(II), (C)-(III), (D)-(IV)
Option B:
(A)-(III), (B)-(II), (C)-(I), (D)-(IV)
Option C:
(A)-(II), (B)-(III), (C)-(IV), (D)-(I)
Option D:
(A)-(IV), (B)-(I), (C)-(II), (D)-(III)
Correct

Answer: D

Step-by-step solution

Reaction (A) is a combination reaction because two elements, nitrogen and oxygen, combine to form a single compound nitric oxide; hence it corresponds to (IV).

Reaction (B) is a decomposition reaction because lead nitrate breaks down into simpler substances on heating; hence it corresponds to (I).

Reaction (C) is a displacement reaction because sodium displaces hydrogen from water to form sodium hydroxide and hydrogen gas; hence it corresponds to (II).

Reaction (D) is a disproportionation reaction because nitrogen in nitrogen dioxide undergoes both oxidation and reduction in the same reaction; hence it corresponds to (III).

Thus, the correct matching is (A)-(IV), (B)-(I), (C)-(II), (D)-(III).

Answer key and solution verified before publishing.

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Exam: JEE Main 2024
Paper: 6 April, Shift 2
Subject: Chemistry
Chapter: Redox Reactions
Topic: Types of Redox Reactions & Balancing of Redox Reactions