JEE Main 2022 Chemistry question

Arrange the following in the decreasing order of their covalent character : (A) LiCl (B) NaCl (C) KCl (D) CsCl Choose the most appropriate answer from the options given below :

(1)(A) > (C) > (B) > (D)
(2)(B) > (A) > (C) > (D)
(3)(A) > (B) > (C) > (D)Correct
(4)(A) > (B) > (D) > (C)

Answer: (3)

Solution

By Fajans' rules the covalent character increases with the polarising power of the cation, which decreases down

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Question ID VK-035288