Given below are two statements :
Statement I: 
ion will absorb light of lower energy than 
ion.
Statement II : In 
ion, the energy separation between the two set of d-orbitals is more than 
ion.
In the light of the above statements, choose the correct answer from the options given below:
Text Solution
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Crystal field theory explains d-d transitions in complexes based on ligand field strength.
Statement I: Ligand field strength order is 
. Since 
is weaker than 
has smaller crystal field splitting ( 
) than 
. The d -d absorption energy equals the splitting energy, so 
absorbs lower energy light. TRUE
Statement II: 
is a much weaker field ligand than 
. Therefore, 
has smaller crystal field splitting than 
, not larger. The energy separation in 
is less than in 
. FALSE
Statement I is true but Statement II is false.
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