Q.

Carbon disulfide is agitated with a mixture of common salt, sulfur, sand, and iron filings, then filtered through filter paper. In a china plate, the filtrate is evaporated to dryness. After evaporation, what will be left in the dish?

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a

Iron filings

b

Common salt

c

Sand

d

Sulfur

answer is B.

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Detailed Solution

After evaporation, sulfur particles will remain in the dish.

Only sulfur dissolves when the mixture is agitated with carbon disulfide, resulting in a yellow-colored product.

Because common salt is a non-polar solvent, it will not dissolve.

Common salt, sand, and iron filings remain in the filtered paper after the combination is filtered through the filtered paper.

The filtrate is then evaporated to dryness, leaving sulfur in the china dish after evaporation.

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