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NEET levelSingle correct optionDifficulty 1 of 3rx103

Which of the following species can act ONLY as an oxidising agent (judge by the oxidation state of sulphur)?

A $H X_{2} S$
B $H X_{2} SO X_{4}$
C $S$
D $SO X_{2}$

Answer: B

S has +6 in

H X_{2} SO X_{4}

, its maximum oxidation state, so it can only be reduced.

H X_{2} S

(-2) can only be oxidised, while

S

(0) and

SO X_{2}

(+4) are in intermediate states and can do both. So

H X_{2} SO X_{4}

is the answer.

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