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A substance on treatment with dilute H(2...

A substance on treatment with dilute `H_(2)SO_(4)` liberates a colourless gas which produces `(I)` turbidity with baryta 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)toBaSO_(3)darr("white")+2OH^(-)`
`3SO_(2)+Cr_(2)O_(7)^(2-)+2H^(+)to2Cr^(3+)("green colour solution")+3SO_(4)^(2-)+H_(2)O`
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