1.

Acidifed K_(2)Cr_(2)O_(7) oxidises H_(2)S to :

Answer»

`SO_(2)`
`SO_(3)`
S
`H_(2)SO_(4) + S`

Solution :`3H_(2)S + Cr_(2)O_(7)^(2-) + 8H^(+) to 2Cr^(3+) + 3S + 7H_(2)O`


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