1.

NH_(3) solutionwas added to four semple solution in difference test tube and found the following observation about the precipitate. a. White ppt which is solution in oxcess of NH_(3) solution b.On heating whichis white in cold but yellow on heating c. The cationpresent in (b) forms white ppt , with hypo solutionwhich give black ppt on heating d. The cation present in (c ) forms soluble complex withexcess of NH_(3) solution White ppt in (c) and the soluble complex fromwhite ppt withthe type solution is//are

Answer»

`Pb(OH)_(2),[Pb(S_(2)O_(3))_(2)]^(2)`
`Ag_(2)O, [Ag(S_(2)O_(3))_(2)]^(2)`
`HgO.HG(NH_(2))NO_(3),[Hg(S_(2)O_(3))_(2)]^(2-)`
NONE of these

Solution :N//A


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