The correct statement on the isomerism associated with the following complex ions.
`I [Ni(H_(2)O)_(5) NH_(5)]^(2+)`
`II . [Ni (H_(2) O)_(4) (NH_(3))_(2)]^(2+)`
`III. [Ni(H_(2)O)_(3)(NH_(3))_(3)]^(2+)`

Options

A. (I ) and (II) show geometrical and optical isomerism
B. (I) and (II) show only optical isomerism
C. (II ) and(III ) show only geometrical isomerism
D. (II ) and (III) show geometrical and optical isomerism

Answer

C

Explanation

(II ) and (III ) shows only geometrical isomerism
`[Ni(H_(2)O)_(4)(NH_(3))_(2)]^(2+)` show cis and trans -isomers , these are following

` [Ni (H_(2)O)_(3) (NH_(3))_(3)]^(2+)` show facial and meridional geometrical isomerism .