Q.

Which of the fallowing has minimum covalent character with I- ?

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a

Na+

b

K+

c

Rb+

d

Cs+

answer is D.

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Detailed Solution

Number of shells increases size increases down the group in alkali metals.cation size∞1polarizing power∞ionic charecter∞melting point ∞1covalent character, hence Cs+ ion has minimum covalent character with I-.
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