Redox and Equivalent ConceptHard

Question

Which of the following is a non-redox process?

Options

A.SO₄²⁻ → SO₃

B.Cr₂O₇²⁻ → CrO₄²⁻

C.PO₄³⁻ → P₂O₇⁴⁻

D.C₂O₄ ²⁻ → CO₂

Solution

(a) Oxidation state of S = +6 in both.

(b) Oxidation state of Cr = +6 in both.

(c) Oxidation state of P = +5 in both.

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