Question

The correct sequence of increasing covalent character is represented by

(a) LiCl < NaCl < BeCl₂

(b) BeCl₂ < LiCl < NaCl

(c) NaCl < LiCl < BeCl₂

(d) BeCl₂ < NaCl < LiCl

Answer 1

The correct option is: (c) NaCl < LiCl < BeCl₂

Explanation:

Covalent character in a compound is found by Fajan's Rule.

Fajan's Rule :

(i) Greater the size of the cation more will be the ionic character and

(ii) Greater the size of anion more will be its covalent character and charge on the cation is dominant over the size of the cation.

(iii) Greater the charge on the cation more will be its covalent character.

Hence, BeCl₂ < LiCl < NaCl (In Covalent character).