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(A) According to $Fajan's$ rule,the covalent character of an ionic bond increases with the decrease in the size of the cation.The order of the size of

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$(A) > (B) > (C) > (D)$

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(A) According to $Fajan's$ rule,the covalent character of an ionic bond increases with the decrease in the size of the cation.The order of the size of the alkali metal cations is: $Li^+ Since the size of the cation increases from $Li^+$ to $Cs^+$,the polarizing power decreases.Therefore,the decreasing order of covalent character is: $LiCl > NaCl > KCl > CsCl$,which corresponds to $(A) > (B) > (C) > (D)$.

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.

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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.