Concentrated HNO_3 and concentrated H_2SO_4 can t be used for the prep – InterviewSolution

InterviewSolution

1.	Concentrated HNO_3 and concentrated H_2SO_4 can t be used for the preparation of H_2S. Give reason
Answer» Solution :Both concentrated `HNO_3` and concented `H_2SO_4` are strong OXIDIZING agents. As a result they react with `H_2S` formed and oxidize it to sulphur .Here the ACIDS are reduced to `SO_2" and " NO_2` RESPECTIVELY . `H_2S+H_2SO_4rarr S+SO_2+H_2O` `H_2S+2HNO_3 RARR S+2CO_2H_2O`

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