Welcome to BodhiClasses, your one-stop hub for high-quality NCERT-based resources! In this post, we’re diving deep into Chapter 9: Methods of Separation in Everyday Life from Class 6 Science. Along with textbook learning, extra practice helps boost retention and exam confidence.
MCQs – Multiple Choice Questions (1 Mark Each)
- Which method is used to separate tea leaves from tea?
- (a) Sedimentation
- (b) Filtration
- (c) Evaporation
- (d) Churning
✅ Answer: (b) Filtration
- Which of these is a magnetic substance?
- (a) Wood
- (b) Plastic
- (c) Iron
- (d) Glass
✅ Answer: (c) Iron
- What does decantation involve?
- (a) Dissolving a solid
- (b) Heating a solution
- (c) Pouring off liquid from settled solid
- (d) Mixing two liquids
✅ Answer: (c) Pouring off liquid from settled solid
- What method is used to obtain salt from seawater?
- (a) Filtration
- (b) Decantation
- (c) Churning
- (d) Evaporation
✅ Answer: (d) Evaporation
- Which of the following uses wind to separate mixtures?
- (a) Sieving
- (b) Filtration
- (c) Winnowing
- (d) Decantation
✅ Answer: (c) Winnowing
- What is left behind on filter paper after filtration?
- (a) Filtrate
- (b) Solution
- (c) Residue
- (d) Solvent
✅ Answer: (c) Residue
- Butter is separated from curd by:
- (a) Filtration
- (b) Churning
- (c) Evaporation
- (d) Sedimentation
✅ Answer: (b) Churning
- Which of the following is not a method of separation?
- (a) Sieving
- (b) Mixing
- (c) Decantation
- (d) Winnowing
✅ Answer: (b) Mixing
- The process of separating grains from stalks is:
- (a) Threshing
- (b) Winnowing
- (c) Filtering
- (d) Churning
✅ Answer: (a) Threshing
- A magnet is used in which separation method?
- (a) Churning
- (b) Magnetic separation
- (c) Sedimentation
- (d) Evaporation
✅ Answer: (b) Magnetic separation
True or False Questions (With Corrections)
- Handpicking is used when the unwanted component is present in large amounts.
❌ False – It is used when the unwanted component is less in quantity. - Sieving separates solids of different sizes.
✅ True - Evaporation can be used to separate a solid dissolved in a liquid.
✅ True - Magnetic separation is useful for separating plastic and iron.
✅ True - Filtration works for separating oil from water.
❌ False – Decantation is used. - Winnowing uses water for separation.
❌ False – It uses wind or air. - Churning can separate impurities from water.
❌ False – Churning is used to extract butter from curd. - Sedimentation is a process where lighter particles settle down.
❌ False – Heavier particles settle down. - Decantation and filtration can be used together.
✅ True - Magnetic separation works only on liquids.
❌ False – It works on solids, especially metal particles.
One Mark Questions – Very Short Answers
- What is the principle behind winnowing?
✅ Answer: Difference in weight of particles. - Which method is used to separate iron nails from sawdust?
✅ Answer: Magnetic separation. - Name one everyday example of filtration.
✅ Answer: Separating tea leaves using a strainer. - What happens to the heavier particles in sedimentation?
✅ Answer: They settle down. - Which method involves beating stalks?
✅ Answer: Threshing. - Give one use of evaporation.
✅ Answer: Getting salt from seawater. - Which separation method uses pores?
✅ Answer: Sieving. - Which method is used before cooking rice or dal?
✅ Answer: Handpicking. - What is left after decantation?
✅ Answer: The sediment and some liquid. - Which natural process helps in evaporation?
✅ Answer: Sunlight.
Two Mark Questions – Short Answers
- What is filtration? Give an example.
✅ Answer: Filtration is the method of separating insoluble solids from liquids using a filter. Example: Separating tea leaves from tea. - Differentiate between decantation and sedimentation.
✅ Answer: In sedimentation, heavier particles settle at the bottom. In decantation, the clean liquid is poured out after sedimentation. - Write two conditions necessary for handpicking.
✅ Answer: The unwanted material should be visible and present in small quantity. - Why is churning important in villages?
✅ Answer: It helps villagers extract butter from curd, especially in households that make dairy products. - How is salt obtained from seawater?
✅ Answer: By the process of evaporation—seawater is left to evaporate under the sun, leaving salt behind.
HOTS – Higher Order Thinking Skills Questions
- If you have a mixture of iron nails, sand, and salt, how would you separate all components?
✅ Answer: Use a magnet to separate iron nails, dissolve the rest in water, filter to remove sand, then evaporate water to get salt. - Why is filtration more efficient than decantation?
✅ Answer: Filtration removes even the smallest solid particles, whereas decantation leaves some behind. - A factory dumps salty water into a pond. Suggest an eco-friendly way to reuse it.
✅ Answer: Use evaporation to extract salt and reuse the water, after filtration, for irrigation if safe. - Which method would you use if your drinking water is muddy and you don’t have a filter?
✅ Answer: First sedimentation, then decantation, followed by cloth filtration and boiling. - Suggest a low-cost water filter using household items.
✅ Answer: Use layers of gravel, sand, charcoal, and cotton in a bottle to make a DIY water filter.
