In the Down's process of obtaining sodium, $C a C l_{2}$ is added:

To get high yield of sodium

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To improve the quality of sodium obtained

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To lower the operating temperature

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To act as a reducing agent

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Solution

The correct option is C To lower the operating temperature
Melting point of $N a C l$ is 803 $^{o}$ C. After adding $C a C l_{2}$ , melting point of mixture comes to 600 $^{o}$ C.
reaction:
$M g^{2 +} + C a (O H)_{2} \to M g (O H)_{2} + C a C l_{2} d i l . H C l - --- \to M g C l_{2} .6 H_{2} O$
$M g C l_{2} .6 H_{2} O \to M g C l_{2} .2 H_{2} O d r y H C l - --- \to M g C l_{2}$

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Similar questions

C a C l_{2}

Sodium acts as as a strong reducing agent. Which of the following reaction/ reactions exemplifies this behaviour.

N a C l

803^{0} C

600^{0} C

C a C l_{2}

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