Al reacts with conc. $H_{2} S O_{4}$ and forms:

S O_{3}

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S O_{2}

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H_{2}

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S(vap)

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Solution

The correct option is A $S O_{2}$
$2 A l + 6 H_{2} S O_{4} \to A l_{2} (S O_{4})_{3} + 3 S O_{2} + 6 H_{2} O$ .

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