[" A white ppt.obtained in the salt analysis of a mixture "],[" becomes black on treatment with "NH_(4)" OH.It may be- "]

A white ppt obtained in the anylsis of a mixture becomes black on treatment with NH_(4)OH it may be

A white ppt obtained in the analysis of a mixture becomes black on treatment with NH_(3) or NH_(4)OH due to the formation of finely divided Hg and Hg (NH_(2))CI i.e. [Hg+Hg (NH_(2))CI] The salt may be

A white ppt , is obtainned when

A white sublimable substance, that turns black on treatment with an NH_(3) solution can be:

A white sublimable substance, that turns black on treatment with an NH_(3) solution can be: