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When the following five anions are arranged. in order of decreasing ionic radius, the correct sequence is:

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a
Se2,I,Br,O2,F
b
I,Se2,O2,Br,F
c
Se2,I,Br,F,O2
d
I,Se2,Br,O2,F

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detailed solution

Correct option is D

The atomic/ionic radii rise as we proceed down the group. On the other hand,  in the period, the ionic radii of isoelectronic species gradually decrease as the atomic number rises.

Thus, the option (B) is the correct answer.

 When the following five anions are arranged in order of decreasing ionic radius, the correct
sequence isI,Se2,Br,O2,F

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