MHT CET 2023 Chemistry question

What is the number of moles of electrons gained by one mole oxidising agent in following redox reaction? Zn + 2HCl ZnCl + H

(A)4
(B)3
(C)2
(D)1Correct

Answer: (D)

Solution

Oxidation numbers: Zn goes from 0 to +2 (oxidised, so Zn is the reducing agent) and H goes from +1 in HCl to 0 in H (reduced), so HCl is the oxidising agent. The reduction half-reaction per H (per HCl) is , so one mole of HCl

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Question ID VK-098321