1.

Which one of the following has an optical isomer ? (en=ethylenediamine )

Answer»

`[ZN(en)(NH_(3))_(2)]^(2+)`
`[Co(en)_(3)]^(3+)`
`[Co(H_(2)O)_(4)(en)]^(3+)`
`[Zn(en)_(2)]^(2+)`

Answer :B


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