During extraction of sodium by Down’s cell process CaCl2 is mixed with NaCl, which lowers the fusion — AITS & Test Series Chemistry Question

Question

During extraction of sodium by Down’s cell process CaCl2 is mixed with NaCl, which lowers the fusion temperature, the main reason(s) for lowering the fusion temperature is: (A) It is difficult to maintain 1081 K (fusion temperature of NaCl) during electrolysis and also at lower temperature the consumption of electricity is reduced. (B) Both Na and Cl2 exert corrosive nature/action on the vessel used for electrolysis at such high temperature (1081 K). (C) At lower/reduced fusion temperature (850 K), the sodium is obtained at iron cathode in solid state. (D) Both A and B are some of the reasons.