Updated on April 21, 2023
by Tiwari Academy
by Tiwari Academy
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: 6 | Science |
| 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
Read the following statements and choose the incorrect one?
[A]. Filtration is helpful in separating insoluble solute (solid) from a solution.
[B]. Sedimentation is the process of settling of heavier particles.
[C]. Sieving is the method where wheat flour is generally removed from husk.
[D]. None of the above.
Q3
Paheli asked for a glass of water from Boojho. He gave her a glass of ice-cold water. Paheli observed some water droplets on the outer surface of the glass and asked Boojho, how these droplets of water were formed? Which of the following should be Boojho’s answer?
[A]. Evaporation of water from the glass.
[B]. Water that seeped out from the glass.
[C]. Evaporation of atmospheric water vapour.
[D]. Condensation of atmospheric water vapour.
Q4
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.
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
Which of the following statement is or are incorrect?
[A]. Water is capable of dissolving a variety of different substances as it is called “Universal solution”.
[B]. Distillation is a method of obtaining a pure liquid from a solution by heating at a certain temperature.
[C]. Evaporation is a method used to separate a dissolved solid component from a solution by heating.
[D]. None of the above.
Q8
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.
Q9
Paheli wants to write the reasons for separating mixtures into their compounds:
[A]. To obtain useful component.
[B]. To remove undecidable component.
[C]. To obtain the pure sample of a substance.
[D]. All of the above.
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
A transparent bottle, half filled with water is left outside in sun for a few hours. After some time, some water droplets are observed on the inner upper surface of the bottle. Which processes do you think, are the cause of these droplets?
[A]. Condensation and saturation
[B]. Boiling and condensation
[C]. Evaporation and condensation
[D]. Evaporation and saturation
Q14
Four mixtures are given below, which of these can be separated by the method of winnowing?
[A]. Kidney beans and chickpeas, pulses and rice
[B]. Pulses and rice, Rice-flakes and corn
[C]. Kidney beans and chickpeas, Rice-flakes and corn
[D]. Rice-flakes and corn, Potato wafers and biscuits
Q15
In which of the following statements is or are incorrect?
[A]. Centrifugation is used to separate cream from milk.
[B]. For Separation of two miscible liquids we use filtration process.
[C]. Chlorine is added to water to kill germs.
[D]. Shallow salt water lakes are called “Lagoon”.
Q16
Which amongst the following methods would be most appropriate to separate grains from bundles of stalks?
[A]. Hand-picking
[B]. Winnowing
[C]. Sieving
[D]. Threshing
Q17
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.
Q18
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
Q19
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
Q20
Paheli asked for a glass of water from Boojho. He gave her a glass of ice-cold water. Paheli observed some water droplets on the outer surface of the glass and asked Boojho, how these droplets of water were formed? Which of the following should be Boojho’s answer?
[A]. Evaporation of water from the glass
[B]. Water that seeped out from the glass
[C]. Evaporation of atmospheric water vapour
[D]. Condensation of atmospheric water vapour
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 is writing some statements. She wants to know in which of the following statements is or are incorrect?
[A]. The solubility of a substance in water increases on increasing the temperature.
[B]. The solubility of a substance in water increases on lowering the temperature.
[C]. The solubility of a substance refers to its saturated solution.
[D]. The solubility of different substance is water is different.
More Questions for practice
- What do you mean by classification?
- Name two natural materials and two man-made materials.
- What is a magnetic material?
- Name four substances which flow or sink in water.
- Give two examples of each of the following—transparent, translucent and opaque.
- 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
