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  4. Assertion: LiCl is predominantly a covalent compound. Reason: Electronegativity difference between Li and Cl is too small.

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Q. Assertion : $LiCl$ is predominantly a covalent compound.
Reason : Electronegativity difference between $Li$ and $Cl$ is too small.

AIIMSAIIMS 2019Chemical Bonding and Molecular Structure

Solution:

$LiCl$ is covalent due to high polarising power of $Li ^{+}$. According to Fajan 's rule, the smaller the size of cation and the larger the size of anion, greater is the polarising power and hence greater is the covalent character.