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One gas bleaches the colour of flowers by reduction, while the other by oxidation

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One gas bleaches the colour of flowers by reduction, while the other by oxidation

(a) CO and Cl2

(b) SO2 and Cl2

(c) H2S and Br2

(d) NH3 and SO2

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Correct answer: (b) SO2 and Cl2

Explanation:

SO2 bleaches by reduction, while chlorine bleaches colour of flowers by oxidation.

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