Match the column A with column B. Column A Column B 1. Alcohol from mixture of alcohol and water. a. Evaporation 2. Charcoal from a mixture of charcoal and water. b. Crystallisation 3. Copper sulphate crystals from copper sulphate in water. c. Fractional distillation 4. Sulphur from a mixture of sulphur and charcoal. d. Sedimentation 5. Iron from a mixture of iron and lead. e. Magnetic separation

1. Alcohol from a mixture of alcohol and water can be separated by fractional distillation as they are miscible liquids. 2. Charcoal from a mixture of charcoal and water can be separated by sedimentation. That is, charcoal being insoluble, will settle at the bottom of the container and the water can be decanted. 3. Copper sulphate crystals from copper sulphate in water can be separated by crystallisation. It is done based on the difference in solubility of solids in a liquid. 4. Sulphur from a mixture of sulphur and charcoal is separated by evaporation. It is first dissolved in carbon disulphide solvent. The sulphur will dissolve and carbon will remain as residue. Evaporate the filtrate to obtain sulphur. 5. Iron from a mixture of iron and lead can be separated by magnetic separation because iron will get easily attracted to magnets. Column A Column B 1. Alcohol from mixture of alcohol and water. c. Fractional distillation 2. Charcoal from a mixture of charcoal and water. d. Sedimentation 3. Copper sulphate crystals from copper sulphate in water. b. Crystallisation 4. Sulphur from a mixture of sulphur and charcoal. a. Evaporation 5. Iron from a mixture of iron and lead. e. Magnetic separation

E M B I B E

Its All About Science - Chemistry>Chapter 3 - Elements, Compounds and Mixtures>Exercise>Q A

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Which of the following technique to be used to separate chalk from the mixture of chalk and water?

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Important Questions on Elements, Compounds and Mixtures

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Its All About Science - Chemistry>Chapter 3 - Elements, Compounds and Mixtures>Exercise>Q B

Separation of iron articles in a junk yard uses the technique of _____.

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Its All About Science - Chemistry>Chapter 3 - Elements, Compounds and Mixtures>Exercise>Q C

Give reason for the following statement:

A mixture of oil and water retains the properties of its constituents.

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Its All About Science - Chemistry>Chapter 3 - Elements, Compounds and Mixtures>Exercise>Q C

Give reason for the following statement:

Magnetic separation cannot be used to separate a mixture of copper and sulphur.

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Its All About Science - Chemistry>Chapter 3 - Elements, Compounds and Mixtures>Exercise>Q C

Give reason for the following statement:

Sand particles are separated from gravel at construction sites using sieving.

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Its All About Science - Chemistry>Chapter 3 - Elements, Compounds and Mixtures>Exercise>Q D

Match the column A with column B.

Column A	Column B
1. Alcohol from mixture of alcohol and water.	a. Evaporation
2. Charcoal from a mixture of charcoal and water.	b. Crystallisation
3. Copper sulphate crystals from copper sulphate in water.	c. Fractional distillation
4. Sulphur from a mixture of sulphur and charcoal.	d. Sedimentation
5. Iron from a mixture of iron and lead.	e. Magnetic separation