1.

A chloride of fourth group cation in qualitative analysis gives a green coloured complex [A] in aqueous solution which when treated with ethane –1, 2 – diamine (en) gives pale - yellow solution [B] which on subsequent addition of ethane –1, 2 – diamine turns to blue/purple [C] and finally to violet [D]. Write the structures of complexes [A], [B], [C] and [D].

Answer»

A=[Ni(H2O)6]2+

B=[Ni(H2O)4(en)]2+

C=[Ni(H2O)2(en)2]2+

D=[Ni(en)3]2+



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