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  4. Which of following represents the correct order of covalent character among the iodides of alkali metals?

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Q. Which of following represents the correct order of covalent character among the iodides of alkali metals?

NTA AbhyasNTA Abhyas 2022

Solution:

Extent of polarization decreases with increasing in size of cation. Extent of polarization is maximum in LiI and minimum in CsI. Hence, LiI has maximum covalent character while CsI has minimum covalent character.
LiI > NaI > KI > RbI > CsI