$N a C l$ and $C a C l_{2}$ are added to fused $M g C l_{2}$ in the electrolysis of $M g C l_{2}$ so that _____________.

melting point is decreased and conductivity is increased

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melting point is increased and conductivity is decreased

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melting point and conductivity both are decreased

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melting point and conductivity both are increased

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Solution

The correct option is D melting point is decreased and conductivity is increased
From fused mixture of NaCI and $C a C l_{2}$ by Electrolytic reduction by the Down's process. $N a C l$ and $C a C l_{2}$ are added to fused $M g C l_{2}$ in the electrolysis of $M g C l_{2}$ so that melting point is decreased and conductivity is increased. Hence, option A is the correct answer.

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