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MolSynapse / Question bank / p-Block Elements: Groups 15 and 16 / Sulphur allotropes, SO2, sulphuric acid, oxyacids of sulphur

JEE Main levelSingle correct optionDifficulty 2 of 3pn153

Hydrogen sulphide gas is passed in excess into a solution of sulphur dioxide. The moles of sulphur formed per mole of $SO X_{2}$ consumed are

A3
B2
C1.5
D1

Answer: A

SO X_{2} + 2 H X_{2} S 3 S + 2 H X_{2} O

. Here SO2 is reduced (S from +4 to 0) and H2S oxidised (S from

- 2

to 0). One mole of SO2 gives 3 mol of S.

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