The compound insoluble in water is

Options

A. Mercurous nitrate
B. Mercuric nitrate
C. Mercurous chloride
D. Mercurous perchlorate.

Answer

C

Explanation

According to"solubility rule" following compounds are soluble in water:(i)All common IA and `NH_(4)^(+)` compounds.
(ii)All common `NO_(3)^(-)`(nitrate),`CH_(3)OO`(acetate),`ClO_(4)^(-)`(perchlorate)compounds
(iii)All common `Cl^(-)`,`Br^(-)`,`l^(-)` compounds,expect those of `Ag^(+),Pb^(2+),Cu^(+),Br^(-),I^(-)`Compounds,except those of`Ag^(+),Pb^(2+),Cu^(+)` and `Hg^(2+)` (mercurous)
(iv)all common `SO_(4)^(2-)` (sulphate) compounds,except those of `Ca^(2+),Sr^(2+),Ba^(2+)` and` pB^(2+)`.