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Question

There is foul smell in presence of moisture with:

A
AlCl3
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B
Al2(SO4)3
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C
FeS
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D
FeSO4
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Solution

The correct option is B FeS
There is foul smell in presence of moisture with FeS due to formation of H2S.
FeS+3H2OFe(OH)3+3H2S

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