In which of the following case(s), there

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Home Questions 335A5URNNY

Target Exam

CUET

Subject

Chemistry

Chapter

Inorganic: D and F Block Elements

Question:

In which of the following case(s), there is a change in oxidation number?

Options:

2CrO₄^2- + 2H⁺ → Cr₂O₇^2- + H₂O

Cr₂O₇^2- + 3SO₂ + 2H⁺ → 2Cr³⁺ + 3SO₄^2- + H₂O

Cr₂O₇^2- + 2OH^- → 2CrO₄^2- + H₂O

CrO₂Cl₂ + 2NaOH → Na₂CrO₄

Correct Answer:

Cr₂O₇^2- + 3SO₂ + 2H⁺ → 2Cr³⁺ + 3SO₄^2- + H₂O

Explanation:

Cr₂O₇^2- + 3SO₂ + 2H⁺ → 2Cr³⁺ + 3SO₄^2- + H₂O

^{+6 +4 +3 +6}