Class 6 Science Chapter 3 MCQ (Multiple Choice Questions) of Separation of Substances. These MCQ tests are prepared taking questions from NCERT Textbook of Class 6 Science Chapter 3 and Exemplar books. All the Objective questions are explained well with proper answer and giving reason behind the answers.

Class 6 Science Chapter 3 MCQ for 2024-25

Class: 6Science
Contents:Multiple Choice Questions – MCQ Tests

Class 6 Science Chapter 3 MCQ with Answers

Class 6 Science Chapter 3 MCQ with answers and explanation are given below. These sets of MCQs are the collection of Objective Questions from Class 6 Science Chapter 3. Practice these questions to buildup confidence and score good marks in tests.

Q1

Read the following statements and choose who dissolved maximum sugar in liquids?

[A]. Boojho took hot boiling milk to dissolve sugar.
[B]. Paheli took ice cold milk to dissolve sugar.
[C]. Payel took room temperature milk to dissolve sugar.
[D]. None of the above.
Q2

Consider the following sentences and choose the incorrect one:

[A]. A mixture of tea leaves and milk can be separated by decantation.
[B]. A mixture of wheat grains and rice flakes can be separated by winnowing.
[C]. A mixture of iron filling and rice flour can be separated by sieving.
[D]. Water can be separated from salt by evaporation.
Q3

Consider the following statements and choose the incorrect one:

[A]. Rice flour mixed with kidney beans, separated by sieving.
[B]. Lady’s finger mixed with French-beans, separated by hand-picking.
[C]. Salt mixed with water, separated by evaporation.
[D]. None of the above.
Q4

During summer, Boojho carries water in a transparent plastic bottle to his school. One day, he left his bottle in this school. The bottle still had some water left in it. The next day, he observed some water droplets on the inner surface of the empty portion of the bottle. These droplets of water were formed due to:

[A]. Boiling and condensation
[B]. Evaporation and saturation
[C]. Evaporation and condensation
[D]. Condensation and saturation
Q5

In which of the following statement is or are incorrect?

[A]. The clear liquid that remains above the sediments is called supernatant.
[B]. The process of separating insoluble components from a mixture using a filter paper or cloth is called filtration.
[C]. The process of adding of alum in muddy water which loads the mud particles and speeds of sedimentation is known as loading.
[D]. None of the above.
Q6

Paheli is writing some statements but she confused to know whether the statements are incorrect? Would you help her?

[A]. The ability of a substance to dissolve in water to form a solution is known as solvent.
[B]. A substance in which others materials dissolve called solute.
[C]. The substance that is dissolved in the solvent to form the solution called solubility.
[D]. All the above.
Q7

In an activity, a teacher dissolved a small amount of solid copper sulphate in a tumbler half filled with water. Which method would you use to get back solid copper sulphate from the solution?

[A]. Decantation
[B]. Evaporation
[C]. Sedimentation
[D]. Condensation
Q8

Mohan is writing some statements, choose the correct statements and help him:

[A]. Mixture is a substance obtained by mixing more than one pure substance.
[B]. Pure substance that is made of only one kind of particles.
[C]. Aerated drink is a mixture of water, sugar and carbon dioxide.
[D]. All the above
Q9

In which of the following statements is or are incorrect?

[A]. Petroleum (crude oil) is a mixture of various carbon compounds.
[B]. Wheat obtained from field (after threshing) is a mixture of wheat grains and husk.
[C]. Sea water is a mixture of water, common salt and various other salt dissolved in it.
[D]. Milk is a mixture of different liquid.
Q10

If the saturated solution of a substance at a particular temperature is heated to a higher temperature then the solubility of a substance(s):

[A]. Increase
[B]. Decrease
[C]. Remains same
[D]. Little decrease
Q11

While preparing chapattis, Paheli found that the flour to be used was mixed with wheat grains. Which out of the following is the most suitable method to separate the grains from the flour?

[A]. Threshing
[B]. Sieving
[C]. Winnowing
[D]. Filtration
Q12

Which of the following statement is or are incorrect?

[A]. A mixture of milk and water can be separated by filtration.
[B]. Grain and husk can be separated with the process of decantation.
[C]. Separation of sugar from tea can be done with filtration
[D]. All the above.
Q13

In a solution of salt and water, no more salt can be dissolved. If we want to add more salt, it needs to be:

[A]. Shaked well
[B]. Filtered
[C]. Alum has to be added
[D]. Heated
Q14

Consider the following statements and choose the correct statement(s):

[A]. Separating funnel is used for separation of immiscible liquids.
[B]. Centrifugation is used to removal of dissolved solids of different densities from liquids.
[C]. Loading is used to increase the size of impurities so that they settle down fast.
[D]. All the above.
Q15

Boojho has a mixture of iron nails, salt, oil and water. He is trying to separate each one. Consider the statements which is or are correct and help him?

[A]. Hand picking is the method to use to separate iron nails from the mixture.
[B]. Decantation is the method where the mixture is allowed to stand for some time. The clear liquid is poured to another container to separate oil from the mixture.
[C]. Evaporation is the method where remaining liquid is allowed to evaporate till residue is obtained. This residue is salt.
[D]. All the above
Q16

Boojho appeared in class test where he wrote some statements but he confused to know the incorrect statement. Would you help him to know that?

[A]. A mixture of iron fillings and rice flour can be separated by magnet.
[B]. A mixture of wheat grains and wheat flour can be separated by sieving.
[C]. Water can be separated from salt by evaporation.
[D]. A mixture of oil and water can be separated by filtration.
Q17

If the saturated solution of a substance at a particular temperature is cooled to a lower temperature, then the solubility of substances:

[A]. Increase
[B]. Decrease
[C]. Remains same
[D]. Little bit increase
Q18

Boojho is writing some statements, choose the correct statement and help him:

[A]. Before cooking rice and potato pulses are washed then the water is separated from them by loading.
[B]. The method of decantation can also be used for separating two miscible liquids.
[C]. The process of decantation cannot be used for separating two immiscible liquids.
[D]. None of the above.
Q19

Which of the following mixture would you be able to separate using the method of filtration?

[A]. Oil in Water
[B]. Cornflakes in milk
[C]. Salt in water
[D]. Sugar in milk
Q20

During summer, Boojho carries water in a transparent plastic bottle to his school. One day, he left his bottle in this school. The bottle still had some water left in it. The next day, he observed some water droplets on the inner surface of the empty portion of the bottle. These droplets of water were formed due to:

[A]. Boiling and condensation
[B]. Evaporation and saturation
[C]. Evaporation and condensation
[D]. Condensation and saturation
Q21

Paheli is writing some statements about sieving. Choose the incorrect sentence and help her:

[A]. The cashew-nut of different sizes are separated in cashew-nut factories by the process of sieving.
[B]. Fine sand can be separated from larger particles by sieving.
[C]. The impurities are removed from wheat before grinding by the process of sieving.
[D]. None of the above.
Q22

Boojho’s grandmother is suffering from diabetes. Her doctor advised her to take “Lassi” with less fat content. Which of the following methods would be most appropriate for Boojho to prepare it?

[A]. Filtration
[B]. Decantation
[C]. Churning
[D]. Winnowing
Q23

Consider the following statements and choose the incorrect one:

[A]. Filtration is used for separating insoluble substances from a liquid.
[B]. A mixture of chalk and water is separated by filtration.
[C]. Filtration can remove any solid substances which are dissolved in a liquid.
[D]. A mixture of sand and water can also be separated by filtration.
Q24

Boojho obtained salt from salt water mixture (or salt solution) by evaporation but water cannot be recovered during evaporation, it is lost into air. In order to recover both salt as well as water from solution, method will be:

[A]. Distillation
[B]. Decantation
[C]. Filtration
[D]. Loading
Q25

Paheli bought some vegetables such as French-beans, lady’s finger, green chilies, brinjals and potatoes all mixed in a bag. Which of the following methods of separation would be most appropriate for her to separate them?

[A]. Winnowing
[B]. Sieving
[C]. Threshing
[D]. Hand-picking
More Questions for practice
    1. What do you mean by classification?
    2. Name two natural materials and two man-made materials.
    3. What is a magnetic material?
    4. Name four substances which flow or sink in water.
    5. Give two examples of each of the following—transparent, translucent and opaque.
    6. Name two good conductors and two bad conductors.

What are soluble substances as per Class 6 Science Chapter 5?

Substances like sugar and common salt dissolve completely in water. They are called soluble substances.

What do you understand by metallic lustre in Class 6 Science Chapter 5?

Metals like silver and gold have bright metallic luster because when light falls on the surface of these metals, the surface gives a shining appearance which is known as metallic lustre.

What are insoluble substances from 6th Science Chapter 5?

Certain substances which do not dissolve in water are called insoluble substances.

In Class 6 Science Chapter 5, which type of substances are called transparent substances?

Object which allows light to pass through it completely is called transparent. Example: glass, air.

Last Edited: April 21, 2023