Class 9 · Science · Exploration

5. Exploring Mixtures and their Separation

Try question 1

Common salt can be recovered from sea water by

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Answer and explanation

Answer: B. evaporation

Heating or sun-drying removes the water and leaves the salt.

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Try question 2

Iron filings can be separated from sand by using

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Answer and explanation

Answer: A. a magnet

Iron is attracted by a magnet; sand is not.

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Try question 3

Which of these is a mixture?

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Answer and explanation

Answer: A. Sea water

Sea water contains water with many dissolved salts in no fixed ratio.

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