Teaching CSIR NET Mock Test Series Chemical Sciences Coordination Compounds

The reaction of an aqueous acidic solution of NiCl2 with NaNO2 gives a green precipitate Z, and with KSCN, a purple-colored compound W. Compounds Z and W, respectively, are:

1
Na3Ni(NO2)6 and Ni(SCN)2
2

Na4Ni(NO2)6 and K2Ni(SCN)4

3
Na4Ni(NO2)6 and Ni(SCN)2
4
Na3Ni(NO2)6 and K2Ni(SCN)4
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