1.

Pyridine is mixed with aqueous solution of NiSO_(4), NaNO_(2) solution is then added to mixture to get dark blue precipitate 'A'. Analyse show that A does not contain any SO_(4)^(2-) ion but produce three ions per molecule A is

Answer»

`[Ni(Py)_(2)[NO_(2))_(2)]`
`[Ni(Py)_(4)](NO_(2))_(2)`
`[Ni(Py)_(3)NO_(2)]_(2)SO_(4)`
`[Ni(Py)_(4)]SO_(4)`

ANSWER :B


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