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)^(-)`

A substance on treatment with dilute `H_(2)SO_(4)` liberates a colourl

1.	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)^(-)`
Answer» Correct Answer - C `SO_(3)^(2-) +Ba(OH)_(2) to BaSO_(3) darr ("white")+2OH^(-)` `3SO_(2)+Cr_(2)O_(7)^(2-)+2H^(+) to 2Cr^(3+) ("green colour solution")+3SO_(4)^(2-) +H_(2)O`

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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)^(-)`

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