Published by:
CGP EDU Academic Team
Published on: August 12, 2026
The ions 
and 
are isoelectronic. Their ionic radii show
A
a significant increase from 
to 
to
B
a significant decrease from 
to 
to
C
an increase from 
to 
and then decrease from 
to 
to and then decrease from to
D
a decrease from 
to 
and then increase from 
to 
.
to and then increase from to .
Text Solution
Verified by ExpertsThe correct answer is:
B
Amongst isoelectronic ions, ionic radii of anions are more than that of cations. Further size of the anion increases with increase in −ve charge and size of cation decreases with increase in 
charge. Hence, correct order is
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