1.

A gas 'X' is passed through water to form a saturated solution. The aqueous solution on treatement with silver nitrate gives a white precipitate. The saturated aqueous solution also dissolves magnesium ribbon with evolution of a colourless gas 'Y' Identify 'X' and 'Y'

Answer»

`X=CO_(2),Y=Cl_(2)`
`X=Cl_(2),Y=CO_(2)`
`X=Cl_(2),Y=H_(2)`
`X=H_(2),Y=Cl_(2)`

SOLUTION :Since the SATURATED aqueous solution of (X) give white ppt with `AgNO_(3)`,so (X) may be `Cl_(2)`. Hence
`underset((X))(Cl_(2))+H_(2)OtoHOCl+HCl,`
`HCl+AgNO_(3) to underset(White)(AgCl)darr+HNO_(3)`
`2HCl+Mgto MgCl_(2)+underset((Y))(H_(2))UARR`


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