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In Down's Process, for manufacture of so...

In Down's Process, for manufacture of sodium metals, `CaCl_(2)` is added to `NaCl` in order to :

A

Increase ionisation of `NaCl`

B

Increase the melting point of NaCI

C

Decrease the melting point of `NaCI`

D

Increses conductance of electrolyte

Text Solution

Verified by Experts

The correct Answer is:
C
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Sodium metal can be extracted by either Castner's Process or Down's process Castner's process. Electrolyte to fused NaOH Cathode and anode are made up of a steel rod and Ni cylinder respectively the reaction takes place as follows : At cathode Na^(+)+e^(-)toNa At anode OH^(-)to(1)/(2)H_(2)O+(1)/(4)O_(2)uarr+e^(-) Down's process : Electrolyte to fused NaCl and CaCl_(2) Cathode and anode are ring shaped iron metal and graphite respectively. The reaction takes place as follows : Na^(+)+e^(-)toNa Cl^(-)to(1)/(2)Cl_(2)uarr+e^(-) CaCl_(2) is used along with NaCl due to

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The process of industrial manufacturing of sodium carbonate is known as :