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Question

Considering greater polarization in LiCl compared to that of NaCl, which of the following statements you would expect to be correct ?

A
LiCl has lower melting point than that of NaCl
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B
LiCl dissolves more in organic solvents
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C
LiCl will ionize in water more than NaCl
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D
LiCl is more covalent than NaCl
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Solution

The correct options are
A LiCl has lower melting point than that of NaCl
B LiCl dissolves more in organic solvents
D LiCl is more covalent than NaCl
According to Fajan's rules, higher the polarization, higher is the covalent character.
(i) Covalent compound have lower melting point than ionic thus
LiCl being more covalent than NaCl has lower melting point than that of NaCl.
(ii) Covalent compounds dissolve more in organic non polar solvent than ionic thus LiCl dissolves more in organic solvents.
(iii) Covalent compounds will ionise less than ionic in water
Since, LiCl is covalent while NaCl is ionic. As a result, LiCl will not ionize in water more than NaCl.
(iv) Due to high polarisation in LiCl, it has more covalent character than NaCl
Hence , correct options are A, B ,D

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