Which of the following solvents is used for separation of mixture of sand and sulphur?
A
Water
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B
Benzene
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C
Carbon di sulphide
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D
Ethyl alcohol
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Solution
The correct option is C Carbon di sulphide The separation is carried out by using organic solvent carbon disulphide in which sulfur is soluble. Sand is insoluble and can be filtered out. The remaining solution is exposed to atmosphere from which carbon disulphide will gradually evaporate and sulfur is recovered back from the solution.