Chemistry

Problem

Column-I	Column-II (Characteristics of complex ion compound)
(A) $[\text{Pt}(\text{NO}_2)_2(\text{en})]^{2+}$	(P) Stable according to E.A.N. rule
(B) $[\text{Cr}(\pi\text{-C}_6\text{H}_6)(\text{NO})_2]$	(Q) Ligand acts as ambidentate
(C) $[\text{Ir}(\text{SCN})(\text{SO}_4)(\text{NH}_3)_4]$	(R) Bond order of $M\text{-}L$ bond $> 1.0$
(D) $[\text{Cr}(\text{C}_2\text{H}_4)(\text{CO})_5]$	(S) Bond order of ligand decreases
	(T) Co-ordination number of central metal is six