In the laboratory `H_2S ` gas is prepared by using black lumps and dil. `H_2SO_4`. The black lumps are
A. `FeSO_(4)`
B. `MnO_(2)`
C. FeS
D. `FeSO_(3)`

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1 Answers

Correct Answer - C
In laboratory , `H_2S` is prepared by treating ferrous sulphide (black lumps ) with dil. `H_2SO_4`.
`FeS +H_(2)SO_(4)("dil.")to FeSO_(4)+H_(2)S `

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