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Question

MgCl26H2O is obtained from carnalite. Which of the following is true?

A
MgCl26H2O is left behind in the fused mass
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B
MgCl26H2O solidifies when fused mass is cooled to 176 deg C
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C
KCl remains in the fused state
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D
Solvent extraction is used to extract KCl
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Solution

The correct option is A MgCl26H2O is left behind in the fused mass
Carnalite (KClMgCl26H2O) is fused and cooled to 176 deg C. Potassium content solidifies and MgCl26H2O remains infused state. Fused mass is separated from deposited KCl and is allowed to cool. The remaining KCl is separated by deposition of carnalite crystals, which crystallizes out first.
MgCl26H2O is left behind in the fused mass.

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