The change in oxidation state of sulphur when sulphur dioxide is passed

The Change In Oxidation State Of Sulphur When Sulphur Dioxide Chemistry Question

The change in oxidation state of sulphur when sulphur dioxide is passed in an acidified K₂Cr₂O₇ solution is from

Options

(a) 4 to 0
(b) 4 to 2
(c) 4 to 6
(d) 6 to 4

Correct Answer:

4 to 6

Explanation:

Acidified K₂Cr₂O₇ solution oxidised SO₂ into Cr₂(SO₄)₃.
3SO₂ + K₂Cr₂O₇ + H₂O → K₂SO₄ + Cr₂(SO₄)₃ + H₂O
Oxidation of S =+4
Oxidation of (SO₄) = +6

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Topics: Hydrogen and Redox Reactions (174)
Subject: Chemistry (2512)

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