NEET-XII-Chemistry
c2022 year:2022
- #46The order of energy absorbed which is responsible for the color of complexes (A) `` \left[ Ni \left( H _{2} O \right)_{2}( en )_{2}\right]^{2+} `` (B) `` \left[ Ni \left( H _{2} O \right)_{4}( en )\right]^{2+} `` and (C) `` \left[ Ni ( en )_{3}\right]^{2+} ``
(A)(B) > (A) > (C)
(B)(A) > (B) > (C)
(C)(C) > (B) > (A)
(D)(C) > (A) > (B)digAnsr: DAns : (A) `` \left[ Ni \left( H _{2} O \right)_{2}( en )_{2}\right]^{2+} ``
(B) `` \left[ Ni \left( H _{2} O \right)_{4}( en )\right]^{2+} ``
(C) `` \left[ Ni ( en )_{3}\right]^{2+} ``
en is SFL (strong field ligand)
As the number of en (strong ligand) increase splitting also increases.
So, `` \Delta_{0} `` increases.
i.e. maximum energy will be absorbed in case of option `` C `` .
So the order is `` C >A >B ``