Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Which of the following pairs has both the ions coloured in aqueous solution?
[Atomic number of 
, 
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
: For an ionic species of transition metals to be coloured, it should show 
- 
transition. if there is no 
- 
transition or zero electrons in 
-orbital, then species becomes colourless.
- 
transition
In 
, all 
orbitals will be occupied by one unpaired electron and the geometry will be a perfect octahedral, so transitions will only occur during vibrational distortions, resulting in a pale pink colour.
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