Published by:
CGP EDU Academic Team
Published on: August 12, 2026
is purple while 
is colourless, because
A
there is zero upaired electron in 
.
. B
has 
configuration C
has 
configuration D
is a very small cation when compared to 
and hence, does not absorb any radiation
Text Solution
Verified by ExpertsThe correct answer is:
A
has two unpaired electrons in 
and thus 
transition is possible due to absorption of light in visible region. But this is not possible in 
as it has absence of unpaired electrons.
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