Analytical ChemistryHard

Question

Ammonia/ammonium ion gives yellow precipitate with :

Options

A.H2PtCl6
B.HgCl2
C.Na3[Co(NO2)6]
D.(A) and (C) both

Solution

NH4+ + [PtCl6]2- →  (NH4)2[PtCl6] ↓ (yellow).
[Co(NO2)6]3- + 3NH4+ →  (NH4)3 [Co(NO2)6] ↓ (yellow).

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