JEE Main Chemistry question

Which conversion is an oxidation? [Manipal 2003]

(A)
(B)
(C)
(D)Correct

Answer: (D)

Solution

Oxidation is loss of electrons, i.e. an increase in oxidation number. In (A), S goes from +6 to +4 (reduction). In (B), Cu goes from +2 to 0 (reduction, gain of electrons).

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Question ID VK-136667