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(a) Which isomer of [Co(en)2Cl2]^+ does not show optical isomerism?

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(a) Which isomer of [Co(en)2Cl2]+ does not show optical isomerism?

(b) [NiCl4]–2 is paramagnetic while [Ni(CO)4] is diamagnetic though both are tetrahedral why?

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(a) Trans

(b) [NiCl4]–2 [Ni(CO)4]

Ni+2 = [Ar]4S03d8  Ni = [Ar]4s23d8

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