Question

give reasons for ionic compounds conduct electricity in molten state

Answer 1

Ionic compounds have strong bonding between the atoms. Just because they are formed of a metal and a nonmetal, which means a positively charged ion and a negatively charged ion, the attraction between them is very, very strong. Thus in the solid state they do not conduct electricity.

However, in molten state, the ions dissociate, so the ions become free and mobile, which conducts electricity.

Eg molten sodium chloride dissociates:
NaCl --------> Na+ + Cl-

Answer 2

intermolecular force of attraction(i.e,electrostatic force) will get weaken in fused or molten state thus conduct electricity