Question

Among the following compounds,
the one with greatest ionic
character is​

Answer 1

Answer:

BaCl2

Explanation:

According to Fajans' rule, a compound with low positive charge, large cation and small anion has ionic bond where as a compound with high positive charge, small cation and large anion has covalent bonds.

Covalent character ∝

size of cation

1

Covalent character ∝ size of anion

Lower the covalent character, higher will be ionic character.

Cl2O contains O2−,NCl3 contains N3−

PbCl2 contains Pb

2+ and BaCl2 contains Ba2+.

Hence, the order of covalent character is

NCl3 > Cl2O > PPbCl > BaCl2

∴BaCl2 has the greatest ionic character.