1.

Which of the following ligands are of sigma -donor and pi- acceptor type? (i) C_(2)H_(2), (ii) C_(2)H_(4), (iii) CO, (iv) barCN, (v) (sigma - C_(3)H_(5)^(-))

Answer»

(i), (III) only
(iii) & (iv) only
(iii), (iv) & (V) only
(i) & (II) only

Answer :B


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