0

Separation of Mixtures

Description: This test is useful for all the students of class 6 of CBSE,ICSE and also for the students of different competitive exams .
Number of Questions: 15
Created by:
Tags: separating pure and impure mixtures Science Need for Separating Substances Separation of Substances Grammar Reading Vocabulary
Attempted 0/15 Correct 0 Score 0

Which of the following methods is used to separate water particles from clothes, while drying in the washing machine?

  1. Magnetic separation

  2. Filtration

  3. Evaporation

  4. Centrifugation

  5. Distillation


Correct Option: D
Explanation:

Centrifugation is the process for separating the fine suspended particles of substances in a liquid by rotating the liquid in a closed container. Washing machine works on the principle of centrifugation.

Which of the following terms illustrates, the change from vapour to liquid?

  1. Condensation

  2. Centrifugation

  3. Distillation

  4. Evaporation

  5. Floatation


Correct Option: A
Explanation:

Condensation is the process of changing vapour to liquid.

Which of the following would be described as a 'sediment'?

  1. Pouring the clear liquid

  2. The insoluble solids settling out

  3. Drying the solid by heating

  4. Stirred water and fine sand particles

  5. Remain solid after filtration


Correct Option: B
Explanation:

Sedimentation is the process in which insoluble solids settle out in a liquid. These insoluble solids are called sediment.

Which word means 'it will dissolve'?

  1. Solvent

  2. Soluble

  3. Solute

  4. Solution

  5. Saturate


Correct Option: B
Explanation:

Soluble means the substance will dissolve.

Which of the following means 'how much will dissolve'?

  1. Insoluble

  2. Solubility

  3. Dissolves

  4. Saturated

  5. Solution


Correct Option: B
Explanation:

How much of the substance will dissolve in a given quantity of solvent eg 10 g of salt in 100g of water is known as solubility.

Smoke in a closed room makes the walls black. This is because smoke is a

  1. gas - in - solid mixture

  2. solid - in - solid mixture

  3. solid - in - liquid mixture

  4. gas - in - gas mixture

  5. solid - in - gas mixture


Correct Option: E
Explanation:

Smoke contains carbon particles which are solid, so smoke is a solid - in - gas mixture.

Ultra pure substances from a liquid can be obtained by the process of

  1. Liquification

  2. Sedimentation

  3. Crystallization

  4. Centrifugation

  5. Magnetic separation


Correct Option: C
Explanation:

In this process, pure sample of soluble solid is obtained from its solution by reducing the temperature. In this process liquid solution of a solid is heated and then filtered. Through this, unwanted impurities are removed and then, after cooling  the filtrate in a ice bath, crystals of pure solid are fomed. This process is based on three levels-heating, filtering and cooling, so all are impurities are removed and we get ultra pure substance.

Which of the following properties is used for winnowing?

  1. Difference in weight

  2. Difference in size

  3. Difference in colour

  4. Difference in shape

  5. Difference in state


Correct Option: A
Explanation:

This property is used for winnowing.

Separating the components of a homogeneous mixture using electricity is called

  1. electrification

  2. electrolysis

  3. electrolyte

  4. electromagnetisation

  5. evaporation


Correct Option: B
Explanation:

Electrolysis is the process of separating the components of a homogeneous mixture using electricity.

Iodine, camphor, ammonium chloride and naphthalene are four substances, which of the following properties is common to all these sustances?

  1. Equal densities

  2. Sublimation property

  3. Equal melting points

  4. Pure homogeneous mixtures

  5. Equal boiling points


Correct Option: B
Explanation:

Yes, all the above substances have sublimation property.

Crude oil is purified using fractional distillation process. This method works on the principle of

  1. differences in the masses of the components

  2. differences in the volumes of the components

  3. differences in the boiling points of the components

  4. differences in the densities of the components

  5. differences in their solubility in water


Correct Option: C
Explanation:

Yes, it is done by fractional distillation which is based on the boiling point.

The methods of separation used in municiple water works are

  1. loading, sedimentation, decantation and filtration

  2. sedimentation, filtration and distillation

  3. loading, decantation, sieving and distillation

  4. sedimentation, centrifugation and distillation

  5. loading, sedimentation, filtration and decantation


Correct Option: A
Explanation:

In municiple water works first loading, sedimentation, decantation and then filtration is done.

When a mixture of common salt and ammonium chloride is heated, white fumes are liberated which change into a white deposit when cooked. What is the substance?

  1. Ammonium chloride

  2. Sodium chloride ( common salt )

  3. A mixture of ammonium chloride and common salt

  4. Ammonium sulphate

  5. Calcium carbonate


Correct Option: A
Explanation:

On cooking ammonium chloride sublimes and liberates white fumes , which change into a white deposit .

Cream is separated from milk by

  1. Evaporation

  2. Coagulation

  3. Distillation

  4. Centrifugation

  5. Filtration


Correct Option: D
Explanation:

Cream is separated from milk by centrifugation because on rotating the milk, cream comes up.

Which of the following processes do we use to separate a mixture of water and sulphur?

  1. Filtration

  2. Sublimation

  3. Evaporation

  4. Distillation

  5. Coagulation


Correct Option: A
Explanation:

Because sulphur is insoluble in water so it is separated through filtration.

- Hide questions