1.

An inorganic substance givesbalckppt in group II whichis dissolve inaqua regainEvapotate off aqus regain anddiluteit with water .To this few dropof ammonium thiocyanateandsodiumacelete followedby Co(NO_(3))_(2) are added .A deepbluecolour or ppt .is obtained .Thisis due to presence of

Answer»

`HG^(2+)`
`BI^(3+)`
`Pb^(2+)`
`Cd^(2+)`

ANSWER :a


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