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A substance on treatment with dil H(2)SO...

A substance on treatment with dil `H_(2)SO_(4)` liberates a colourless gas which produces (i) turbidity with ba-ryts water and (ii) turns acidified dichromate solution green .The reaction indicates the presence of:

A

`CO_(3)^(2-)`

B

`S^(2-)`

C

`SO_(3)^(2-)`

D

`NO_(2)^(-)`

Text Solution

Verified by Experts

The correct Answer is:
C
`SO_(3)^(2-)+Ba(OH)_(2)rarrBaSO_(3)darr("white")+2OH^(-)`
`3SO_(2)+Cr_(2)O_(7)^(2-)+2H^(+)rarr2Cr^(3+)("green colour solution ")+3SO_(4)^(2-)+H_(2)O`.
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