Acidified solution of K2Cr2O7 oxidises w

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Target Exam

CUET

Subject

Chemistry

Chapter

Inorganic: D and F Block Elements

Question:

Acidified solution of K₂Cr₂O₇ oxidises which of the following?

Options:

Sulphate ions

Sulphite ions

Nitrate ions

Ferric ions

Correct Answer:

Sulphite ions

Explanation:

Cr₂O₇^2- + 3SO₃^2- + 8H⁺ → 2Cr³⁺ + 3SO₄^2- + 4H₂O

K₂Cr₂O₇ can oxidise SO₃^2- (Sulphite ions) to SO₄^2- (Sulphate ions)

Nitrate ion, ferric ion, and borate ions are already in their highest oxidation state thus they cannot be further oxidized.