1.

How many complexes among the following are paramagnetic [Mn(CN)_(6)]^(3-),[Cr(H_(2)O)_(6)]^(3+),[Co(en)_(3)]^(3+), [V(CO)_(6)],[Ni(NH_(3))_(6)]^(2+),[Ni(dmg)_(3)], [Pt(Cl)_(2),(NH_(3))_(2)].[Cu(NH_(3))_(4)]^(2+),[Cu(CN)_(4)]^(3-)

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ANSWER :5


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