1.

[X] + H_(2)SO_(4) to [Y] a colourless gas with irritating smell, [Y] +K_(2)Cr_(2)O_(7) + H_(2)SO_(4) to "Green solution", [X] and [Y] is :

Answer»

`SO_(3)^(2-), SO_(2)`
`Cl^(-), HCl`
`S^(2-), H_(2)S`
`CO_(3)^(2-), CO_(2)`

Answer :A::C


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