1.

Hexaamminenickel(II) hexanitrocobaltate (III) can be written as :-

Answer»

`[NI(NH_3)_6[Co(NO_2)_6]`
`[Ni(NH_3)_6]_3[Co(NO_2)_6]_2`
`[Ni(NH_3)_6][Co(NO_2)_6]`
`[Ni(NH_3)_6(NO_2)_6]Co`

ANSWER :B


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