Sodium is produced by the electrolysis of a molten mixture of about $40\%$ $NaCl$ and $60\%$ $CaCl_2$ because
- A$CaCl_2$ helps in the conduction of electricity
- BThis mixture has a lower melting point than pure $NaCl$
- C$Ca^{2+}$ can displace $Na$ from $NaCl$
- D$Ca^{2+}$ can reduce $NaCl$ to $Na$
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