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Test: Separation of Substances


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Test: Separation of Substances - Question 1

The method of separation used to separate stones from rice is:

Detailed Solution for Test: Separation of Substances - Question 1

The method of separation used to separate stone from rice is handpicking.

Test: Separation of Substances - Question 2

The separation of grains from husk is done by the process of:

Detailed Solution for Test: Separation of Substances - Question 2
  • Winnowing is the method in which heavier components of the mixture are separated from the lighter substances with the help of wind.
  • This method is used for separating grains from husk after the process of threshing.
Test: Separation of Substances - Question 3

A mixture of chalk and water can be separated by:

Detailed Solution for Test: Separation of Substances - Question 3
  • Chalk powder is a carbonate compound, insoluble in water.
  • Because of this property of chalk powder, it is easy to separate it from water.
  • The mixture containing chalk powder and water is allowed to get filtered.
  • (Filter paper can be used for filtration) After filtration, the retentate obtained is chalk and the filtrate obtained is water without chalk.
  • The retentate is allowed to get dried and hence, chalk is obtained in powder form.
Test: Separation of Substances - Question 4

A solution of salt in water is a:

Detailed Solution for Test: Separation of Substances - Question 4

A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture. The saltwater is homogeneous because the dissolved salt is evenly distributed throughout the entire saltwater sample.
OR
A solution of salt and water is a homogenous solution as no separate boundary is formed.

Test: Separation of Substances - Question 5

The properties used to separate two solids from a mixture by winnowing is ______.

Detailed Solution for Test: Separation of Substances - Question 5
  • Difference in weight is the properties used to separate two solids from a mixture by winnowing.
  • Husk or dirt particles can be separated by winnowing method. It is used to separate the heavier and lighter components of a mixture by wind or by blowing air.
  • In this method, the mixture of husk and seeds of grain are take in plate and are made to fall down from a height up to our shoulders.
Test: Separation of Substances - Question 6

Most of the substance that we see around us are:

Detailed Solution for Test: Separation of Substances - Question 6

Most of the substances that we see around us are mixture of two or more substances.
What is a Mixture? - Definition, Properties, Examples & Types with Videos

Test: Separation of Substances - Question 7

Which of the following dissolve in water?

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Solids, liquids and gases all dissolves in water depending upon the type of the solute.

Test: Separation of Substances - Question 8

The dust particles in the water can be helped to settle down faster by using:

Detailed Solution for Test: Separation of Substances - Question 8

Suspended particles in water can be settled down by using alum as dust particles in water settled faster.

Test: Separation of Substances - Question 9

The process by which the unwanted solid particles are removed from the liquid is called:

Detailed Solution for Test: Separation of Substances - Question 9

The process by which the unwanted solid particles are removed from the liquid is called as filtration.

Test: Separation of Substances - Question 10

Boiling point of pure water is:

Detailed Solution for Test: Separation of Substances - Question 10

Boiling point of pure water is 1000C. 

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