Concentrated $H_{2} S O_{4}$ cannot be used for drying up $H_{2} S$ and $N H_{3}$ .
If true enter 1, else enter 0.

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Solution

$H_{2} S is oxidised to S by H_{2} S O_{4} (which is reduced to S O_{2}) H_{2} S + H_{2} S O_{4} \to 2 H_{2} O + S O_{2} + S While N H_{3} forms salt with H_{2} S O_{4} 2 N H_{3} + H_{2} S O_{4} \to (N H_{4})_{2} S O_{4} Hence, H_{2} S O_{4} can't be used for drying up these gases .$
The given statement is therefore, true.

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