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Extraction of Aluminium

The sodium is...

Question

The sodium is made by electrolysis of a molten mixture of 40% NaCl and 60% $C a C l_{2}$ because :

A

C a C l_{2}

helps in the conduction ofelectricity

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B

C a^{2 +}

can reduce

N a C I

to

N a

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C

C a^{2 +}

can displace

N a

from

N a C I

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D

this mixture has a lower melting point than NaCl

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Solution

The correct option is D this mixture has a lower melting point than NaCl
The sodium is made by electrolysis of a molten mixture of 40% $N a C l$ and 60% $C a C l_{2}$ because the mixture of 40% $N a C l$ and 60% $C a C l_{2}$ has a lower melting point than $N a C l$ .

Only the metal sodium can be easily extracted chlorine is the byproduct in this process.

Hence, option $D$ is correct.

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C a C l_{2}

is added to the heated

M g C l_{2}

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