Question

Statement I: LiCl is predominantly a convalent compound.
Statement II: Electronegativity difference between Li and Cl is too small.
(IIT-JEE, 1998)

• A. Statement I is true; Statement II is true; Statement II is the correct explanation for Statement I.
• B. Statement I is true; Statement II is true; Statement II is not the correct explanation for Statement I.
• C. Statement I is true; Statement II is false.
• D. Statement I is false; Statement II is true.

Answer 1

The correct option is C Statement I is true; Statement II is false.

According to Fajans' rule, the smaller the cation, the more the polarising power and, therefore, more is the polarisation which leads to more covalent character. Due to the smaller size of lithium, it forms covalent chloride. Correct reason: There is a high difference between the electronegativities of Li and Cl.