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Ores and Minerals

Molten mixtur...

Question

Molten mixture of $N a C l$ and $C a C l_{2}$ is added to the heated $M g C l_{2}$ because

A

M g C l_{2}

.

x H_{2} O

+ dry

H C l

973 - 1223 K - ------ \to

Partially dehydrated

M g C l_{2}

and molten mixture

(N a C l + C a C l_{2})

makes it fully dehydrated

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B

C a C l_{2}

is dehydrating agent

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C

(C a C l_{2} + N a C l)

lowers the melting point of

M g C L_{2}

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D

None of these

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Solution

The correct option is C $(C a C l_{2} + N a C l)$ lowers the melting point of $M g C L_{2}$
The $C a C l_{2} + N a C l$ mixture is added to magnesium chloride as it lowers the melting point of magnesium chloride and provides electrical conductivity.

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Similar questions

N a C l

C a C l_{2}

are added to fused

M g C l_{2}

in the electrolysis of

M g C l_{2}

so that _____________.

N a C l

C a C l_{2}

are also added to fused

M g C l_{2}

in the electrolysis of

M g C l_{2}

. Select the correct statement.

Q. Assertion :Magnesium is extracted by the electrolysis of fused mixture of

M g {C l}_{2}, N a C l

C a {C l}_{2}

Reason: Calcium chloride acts as a reducing agent

H C l

was passed through a solution of

C a C l_{2}, M g C l_{2}

N a C l

. Which of the following compound(s) crystallise(s)?

Q. Which of the following orders of alkaline-earth metal chlorides are correct:

(a) covalent nature :

R a C l_{2} < B a C l_{2} < S r C l_{2} < C a C l_{2} < M g C l_{2} < B e C l_{2}

(b) melting point :

B e C l_{2} < M g C l_{2} < C a C l_{2} < S r C l_{2} < B a C l_{2} < R a C l_{2}

(c) lattice energy :

R a C l_{2} < B a C l_{2} < S r C l_{2} < C a C l_{2} < M g C l_{2} < B e C l_{2}

(d) thermal stability :

R a C l_{2} < B a C l_{2} < S r C l_{2} < C a C l_{2} < M g C l_{2} < B e C l_{2}

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