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By Brijesh Sharma
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Updated on 5 Nov 2025, 11:33 IST
CBSE Class 6 Science Separation of Substances worksheets: In CBSE Class 6 Science Chapter 5 – Separation of Substances, students learn how and why we separate different materials from a mixture. This topic helps in understanding real-life examples like separating grains from husk, or salt from water. It builds the base for higher classes and also connects with separation of substances class 6 worksheets with answers which give good practice for exams. These Class 6 science worksheets guide students step by step to know different methods like hand picking, winnowing, filtration and evaporation.
To make learning easy, schools also provide separation of substances class 6 worksheets, worksheet on separation of substances class 6 with answers, and separation of substances class 6 worksheets with answers pdf. Students can check their progress using separation of substances class 6 worksheets with answers ncert that match the NCERT Solutions for class 6 English style of explanations.
Even though the topic is from science, it also improve reading and writing skills which are useful for the CBSE Class 6 English Syllabus. This class 6 science chapter 5 Separation of Substances shows how simple observations in daily life can become scientific concepts.
1. Why do we need to separate different components of a mixture? Give two examples.
Answer: We separate mixture components to remove harmful or unuseful substances (e.g., removing stones from rice) or to obtain useful ones (e.g., separating butter from milk).
2. What is winnowing? Where is it used?
Answer: Winnowing uses wind or blowing air to separate heavier and lighter components. Farmers use it to separate husk from grain.
3. Which method is used to separate stones from rice?
Answer: Handpicking is used to separate stones or unwanted particles from rice.
4. Explain the process of sedimentation.
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Answer: In sedimentation, heavier particles settle at the bottom when a mixture is left undisturbed, such as mud in water.
5. Name the process used to separate tea leaves from prepared tea.
Answer: Filtration separates tea leaves (solid) from prepared tea (liquid).
6. Fill in the blank: The process of conversion of water into vapor is called ________.
Answer: Evaporation
7. How will you separate a mixture of oil and water?
Answer: By decantation or using a separating funnel, since oil and water are immiscible.
8. Name a method used to separate cream from curd.
Answer: Churning (or centrifugation) is used to separate cream from curd.
9. How can you separate sand from a mixture of sand and water?
Answer: By sedimentation (sand settles down) and then decantation or filtration to remove water.
10. Match: Handpicking, Sieving, Winnowing with their main property of separation.
Answer: Handpicking: Size | Sieving: Particle size | Winnowing: Weight
11. State true or false: A mixture of powdered salt and sugar can be separated by winnowing.
Answer: False
12. Which separation technique would you use to get salt from sea water?
Answer: Evaporation (water evaporates leaving salt behind).
13. What are immiscible liquids? Give an example.
Answer: Liquids which do not mix, like oil and water.
14. Which method is used to separate wastewater from soaked rice?
Answer: Decantation is used to pour off the water.
15. Fill in the blank: Chalk powder can be separated from water by ________.
Answer: Filtration
16. Explain how you would separate a mixture of wheat flour, black lentils, and beans.
Answer: Sieving separates wheat flour, and handpicking picks out lentils and beans.
17. Why is wind essential for winnowing?
Answer: Wind carries away lighter husk, while heavier grains fall straight down.
18. How can you separate iron filings from a mixture of sand and iron filings?
Answer: By using a magnet (magnetic separation).
19. Is it possible to dissolve more sugar in water by heating?
Answer: Yes, heating increases the solubility of sugar in water.
20. What is the basis of filtration as a separation process?
Answer: Filtration is based on the size of particles; smaller particles pass through filter paper, larger ones do not.
This chapter shows how we separate mixtures in daily life using easy methods like filtration, evaporation, sieving, decantation and more. Think of cleaning rice, making tea, or getting salt from sea water—these are all separation examples.
Ques: What is the method to separate a mixture of sand and salt?
a) Evaporation
b) Filtration
c) Distillation
d) Handpicking
Answer: b) Filtration
Explanation: First dissolve the mixture in water, filter out the sand, and then you can evaporate water to get salt later if needed.
Ques: What is the primary reason for using a sieve?
a) To dissolve substances
b) To mix substances
c) To separate substances based on size
d) To filter liquids
Answer: c) To separate substances based on size
Explanation: Sieves have holes that let smaller particles pass through and keep bigger ones behind.
Ques: Which separation method would you use to separate a mixture of oil and water?
a) Filtration
b) Evaporation
c) Decantation
d) Handpicking
Answer: c) Decantation
Explanation: Oil floats on water. Let it settle, then carefully pour off the top layer or use a separating funnel.
Ques: What happens during the process of evaporation?
a) Solids are separated from liquids
b) Liquids are separated from other liquids
c) Liquid turns into vapor
d) Mixtures are filtered
Answer: c) Liquid turns into vapor
Explanation: Heating speeds up evaporation. That’s how salt is obtained from seawater.
Ques: Which method is most effective for separating a mixture of sand and sugar?
a) Filtration
b) Handpicking
c) Evaporation
d) Sedimentation
Answer: a) Filtration
Explanation: Dissolve sugar in water, filter out sand, then evaporate the water to recover sugar. Simple and neat.
Ques: What is the process called where a liquid is turned into vapor and then back into liquid?
a) Filtration
b) Evaporation
c) Distillation
d) Decantation
Answer: c) Distillation
Explanation: It involves evaporation followed by condensation to collect a purified liquid.
Ques: To separate a mixture of salt and water, which method is used?
a) Filtration
b) Evaporation
c) Decantation
d) Magnetism
Answer: b) Evaporation
Explanation: Salt doesn’t evaporate, so water leaves as vapor and salt stays behind.
Ques: Which method is used to separate components of a mixture based on differences in solubility?
a) Sieving
b) Evaporation
c) Filtration
d) Handpicking
Answer: b) Evaporation
Explanation: If one substance is dissolved and the other is not, evaporation helps recover the dissolved solid.
Ques: How do you separate a mixture of iron filings and sulfur powder?
a) Filtration
b) Magnetism
c) Decantation
d) Sieving
Answer: b) Magnetism
Explanation: A magnet attracts iron filings, leaving sulfur behind. Easy-peasy.
Ques: What is the process of separating a solid from a liquid using a filter paper called?
a) Filtration
b) Sedimentation
c) Evaporation
d) Distillation
Answer: a) Filtration
Explanation: The filter paper traps the solid and lets the liquid pass through.
Ques: What separation method is used to separate a mixture of sand and salt after dissolving the salt in water?
a) Filtration
b) Decantation
c) Evaporation
d) Sedimentation
Answer: a) Filtration
Tip: Then evaporate to get salt back. Two-step method is common.
Ques: What is the technique used to separate a mixture of grains and husk?
a) Decantation
b) Sieving
c) Evaporation
d) Magnetism
Answer: b) Sieving
Note: In fields, farmers also use winnowing with wind.
Ques: Which method would you use to purify drinking water?
a) Evaporation
b) Filtration
c) Magnetism
d) Handpicking
Answer: b) Filtration
Reminder: Boiling further kills germs. Don’t forget that step at home.
Ques: In which process is salt obtained from seawater?
a) Filtration
b) Decantation
c) Evaporation
d) Distillation
Answer: c) Evaporation
Real-life: This is done in salt pans under sunlight. Very energy effecient.
Ques: Which method is used to remove mud from water?
a) Filtration
b) Decantation
c) Sieving
d) Handpicking
Answer: a) Filtration
Tip: Sometimes sedimentation first, then decantation, then filtration gives cleaner water.
Q1) What is winnowing, and what are its purposes in agriculture?
Answer: Winnowing is a method that uses wind or moving air to separate lighter particles (like husk or chaff) from heavier grains. Farmers pour the mixture from a height; lighter husk blows away while grains fall down.
Purposes and benefits:
Q2) How would you separate a mixture of oil and water?
Answer: Use decantation or a separating funnel. Let the mixture rest; oil (lighter) forms the top layer, water (heavier) stays below. In a separating funnel, open the stopcock to drain water first, then collect oil. This works because oil and water don’t mix and have different densities.
Q3) Describe the process of separating a mixture of iron filings and sulfur powder.
Answer: Use a magnet. Move a magnet over the mixture; iron filings stick to the magnet while sulfur remains. Remove the iron, then gently tap the filings into another container. This is called magnetic separation and is very quick.
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This chapter teaches how different substances in a mixture can be separated using methods like sieving, filtration, decantation, evaporation, and winnowing. It helps students understand real‑life uses of separation.
We separate substances to remove impurities or unwanted materials, to get clean water, pure grains, or useful components from mixtures.
Students can find separation of substances class 6 worksheets with answers pdf and separation of substances class 6 worksheets with answers NCERT on educational sites like Infinity Learn.
These worksheets build understanding through practice questions, fill‑in‑the‑blanks, and diagrams, helping students prepare for exams easily.
Yes, by using CBSE Class 6 English Syllabus and NCERT Solutions for Class 6 English, students can write short notes and summaries to improve both Science and English writing skills.