1.

[X] + H_(2)SO_(4) rarr [Y] colourless gas with irritatingsmell [Y] + H_(2)SO_(4) + K_(2)Cr_(2)O_(7) rarr Greensolution [X] and[Y] are

Answer»

`SO_(3)^(2-),SO_(2)`
`CI^(Theta),HCI`
`S^(2-),H_(2)S`
`CO_(3)^(2-),CO_(2)`

SOLUTION :`[X]+ H_(2)SO_(4) rarr [Y]` colourless gas withirritating smell `[Y] + H_(2)SO_(4) rarr `Greensolution
Sulphite ionsgive sulphidedioxide gaswith sulpharic acid whichturn acidified potassiumdichromate to green
`SO_(3)^(2-) + H_(2)SO_(4) rarr SO_(2) + H_(2)O + SO_(4)^(2-)`
`3SO_(2) + K_(2)Cr_(2)O_(7) + H_(2)SO_(4) rarr K_(2)SO_(4) + underset(Green)((Cr_(2)(SO_(4))_(3))) + H_(2)O`


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