Question: Among the ligands $\mathrm{NH}_{3}$, en, $\mathrm{CN}^{-}$and $\mathrm{CO}$ the correct order of their increasing field strength, is :-
$\mathrm{CO}<\mathrm{NH}_{3}<\mathrm{en}<\mathrm{CN}^{-}$
$\mathrm{NH}_{3}<$ en $<\mathrm{CN}^{-}<\mathrm{CO}$
$\mathrm{CN}^{-}<\mathrm{NH}_{3}<\mathrm{CO}<$ en
en $<\mathrm{CN}^{-}<\mathrm{NH}_{3}<\mathrm{CO}$
Correct Option: , 2
Solution:
Solution not required
