Published by:
CGP EDU Academic Team
Published on: August 12, 2026
is blue in colour while 
is colourless due to:
A
Presence of strong field ligand in 
B
Due to absence of water (ligand), d-d transitions are not possible in 
C
Anhydrous 
undergọes d-d transitions due to crystal field splitting
undergọes d-d transitions due to crystal field splitting
D
Colour is lost due to loss of unpaired electrons.
Text Solution
Verified by ExpertsThe correct answer is:
B
Due to the presence of 
molecule, 
- d transition occur in Cu atom, which result in blue colour of 
. Whereas, in 
, due to absence of any ligand crystal field splitting is not possible. Hence, No colour is observed.
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