Incorrect order of radius is, S r 2 + R b + B r - S e 2 -, N b 5 + Z r 4 + Y 3 +, C o > C o 2 + > C o 3 + > C o 4 +, Ba 2+ > Cs + > Se 2 − > As 3 −

Incorrect order of radius is

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Incorrect order of radius is

ChemistryClassification of Elements and Periodicity in PropertiesJEE Main

Options:

Solution:

1080 Upvotes Verified Answer

The correct answer is:

{Ba}^{2+} > {Cs}^{+} > {Se}^{2 -} > {As}^{3 -}

(A)

and

(B)

use (z/e) concept for isoelectronic species.
In

(C)

size of neutral atom is greater than its cation.

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