1.

Which of the following compound on treatment with a solution of HgCl_(2) first gives a white ppt. and then grey ppt.?

Answer»

`H_(3)PO_(2)`
`SnCL_(2)`
KI
`NH_(3)`

Solution :`2HgCl_(2) + SnCl_(2) to underset("White ppt")(Hg_(2)Cl_(2))+SnCl_(4), HgCl_(2) + SnCl_(2) to underset("grey")(2Hg)+SnCl_(4)`


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