1.

A substance on treatment with dil H_(2)SO_(4) liberates a colourless gas which produces (i) turbidity with baryts water and (ii) terms acidicfied dichromate solution green .The reaction inducates the presencve of

Answer»

`CO_(3)^(2-)`
`S^(2-)`
`SO_(3)^(2-)`
`NO_(2)^(Θ)`

Solution :`BaSO_(3) + 2HCI(DIL) rarr 2NaCI + H_(2)O + SO_(2)`
`K_(2)Cr_(2)O_(7) + H_(2)SO_(4) + 3SO_(2) rarr K_(2)SO_(4) + H_(2)O + Cr_(2)(SO_(4))_(3) GREEN `


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