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What is a simple method to separate sand and iron filings?

Answer and explanation

Correct answer: Magnetic separation

The direct answer is B, magnetic separation. A mixture of sand and iron filings contains two solids with different properties. Iron is attracted by a magnet, but ordinary sand is not. Place the mixture on paper and move a magnet, preferably covered with paper or plastic, over it. The iron filings will cling to the magnet and the sand will remain behind; removing the cover releases the iron. Option A, filtration, is used mainly to separate an insoluble solid from a liquid, so it is not the simple choice here. Option B works because it uses iron’s magnetic property. Option C, evaporation, separates a dissolved solid from a solution by removing liquid, which is not this mixture. Option D, condensation, changes vapour into liquid and does not separate these two solid substances. Remember: iron plus a magnet means magnetic separation. This answer and explanation are consistent and factually sound.

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ChemistryNature-Of-MatterClass-11

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