Question
Sodium is made by the electrolysis of a molten mixture of about $$40\% \,\,NaCl$$ and $$60\% \,\,CaC{l_2}$$ because
A.
$$C{a^{2 + }}$$ can reduce $$NaCl$$ to $$Na$$
B.
$$C{a^{2 + }}$$ can displace $$Na$$ from $$NaCl$$
C.
$$CaC{l_2}$$ helps in conduction of electricity
D.
this mixture has a lower melting point than $$NaCl$$
Answer :
this mixture has a lower melting point than $$NaCl$$
Solution :
The melting point of sodium chloride is high, so to reduce the melting point of $$NaCl$$ some $$CaC{l_2}$$ is added to the electrolytic mixture.