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प्रश्न
Fill in the blanks
___________is a process to obtain a very pure form of a solid dissolved in a liquid.
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उत्तर
Crystallisation is a process to obtain a very pure form of a solid dissolved in a liquid.
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संबंधित प्रश्न
What is meant by a substance?
Classify the following materials as homogeneous mixtures and heterogeneous mixtures :
Soda-water, Wood, Air, Soil, Vinegar, Alcohol and water mixture, Petrol and water mixture, Chalk and water mixture, Sugar and water mixture, Copper sulphate solution.
Name the process you would use to separate a mixture of anthracene and copper sulphate ?
Discuss the method of separating a mixture containing chalk powder, iron filings and naphthalene.
Define the following:
Pure substance
Fill in the blanks
Mist is a _________ mixture of droplets of water and air.
Write “true” or “false” for the following statement
A pure substance consists of only one kind of atom or molecule.
Write “true” or “false” for the following statement
Winnowing is a process to remove small stones from grains.
Give a reason for the following statement:
Gunpowder is an example of a heterogenous mixture.
Suggest separation technique(s) one would need to employ to separate the following mixture.
Common salt, water and sand
