See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

(A)      2 2 K Zn Cl Br CN NO    has four constitutional isomers and each one is chiral. (B) N N N Pt N Me H 2+ has one chiral centre and hence it exists as a pair of enantiomer. (C)    3 2 2 Co ox F Cl      it has three geometrical isomers and one of them is chiral. So, total stereoisomers are 4. (D)   3 6 K FeF is a colourless complex