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Give reason for the following:

(a) LiCl is more covalent than KCl.

(b) LiF has lower melting point than NaCl.

 (c) CuCl is more covalent than NaCl.

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(a) Due to smaller size and high poalrising power of Li+ ion ,LiCl is more covalent than KCl. 

(b) Small cation Li+ ion highly polarizes large anion I-, LiI is more covalent and hence has lower melting point. 

(c) Due to pseudo inert gas configuration, Cu+ is more polarizing than Na+ and hence CuCl is more Covalent NaCl. 

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