MHT CET 2026 Chemistry question

Which of the following reactions is NOT an example of redox reaction?

(A)Cl_2 + 2H_2O + SO_2 \longrightarrow 4H^+ + SO_4^{2-} + 2Cl^-
(B)Cu^{2+} + Zn \longrightarrow Cu + Zn^{2+}
(C)
(D)Correct

Answer: (D)

Solution

A redox reaction involves a change in oxidation numbers. (A) Cl goes 0 to -1 and S goes +4 to +6: redox. (B) Zn goes 0 to +2 and Cu goes +2 to 0: redox. (C) H goes 0 to +1 and O goes 0 to -2:

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Question ID VK-100130