1.

Which of the following has an optical isomer?

Answer»

`[CO(en)(NH_3)_2]^(2+)`
`[Co(H_2O)_4(en)]^(3+)`
`[Co(en)_2(NH_3)_2]^(3+)`
`[Co(NH_3)_3Cl]^+`

ANSWER :C


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