Question

NaCl and CaCl₂ are added to fused MgCl₂ in the electrolysis of MgCl₂ since :

(A) melting point is decreased and conductivity is increased.

(B) melting point is increased and conductivity is decreased.

(C) melting point and conductivity both are decreased.

(D) melting point and conductivity both are increased.

Answer 1

Correct Answer is: (A) melting point is decreased and conductivity is increased.

NaCl and CaCl₂ both being ionic compounds ionise to give ions which lowers the melting point and increase the conductivity of the mixture.