A) \[NO_{3}^{-}<O{{H}^{-}}<pyridne<PP{{h}_{3}}\]
B) \[O{{H}^{-}}<NO_{3}^{-}<PP{{h}_{3}}<pyridne\]
C) \[O{{H}^{-}}<NO_{3}^{-}<pyridne<PP{{h}_{3}}\]
D) \[NO_{3}^{-}<O{{H}^{-}}<PP{{h}_{3}}<pridine\]
Correct Answer: A
Solution :
Increasing order of crystal field splitting power is as follows: \[\underset{weak\text{ }field\text{ }ligand}{\mathop{NO_{3}^{-}<O{{H}^{-}}}}\,\underset{strong\text{ }field\text{ }ligand}{\mathop{<pyridine<PP{{h}_{3}}}}\,\]
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