JEE Advanced Chemistry question

The best reducing agent of the following is

(A)H2SCorrect
(B)Cl⁻
(C)SO4²⁻
(D)O3

Answer: (A)

Solution

H2S contains sulphur in its lowest common oxidation state (−2), giving it substantial room to be oxidised (to S, SO2, or SO4²⁻), making it a strong, well-known reducing agent. Cl⁻ is a poor reducing agent (oxidising it to

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Question ID VK-159424