NCERT Solutions for Class 6 Science Chapter 9: Methods of Separation in Everyday Life (Curiosity)

1. What purpose does handpicking serve in the process of separation?

(i) Filtration

(ii) Sorting (Correct answer)

(iii) Evaporation

(iv) Decantation

(Correct answer) (ii) Sorting 

2. Which of the following substances are commonly separated using the churning method?

(i) Oil from water

(ii) Sand from water

(iii) Cream from milk (Correct answer)

(iv) Oxygen from air

(Correct answer) (iii) Cream from milk

3. Which factor is usually essential for filtration?

(i) Apparatus size

(ii) Presence of air

(iii) Pore size (Correct answer)

(iv) Temperature of the mixture

(Correct answer) (iii) Pore size

4. State with reason(s) whether the following statements are True [T] or False [F]. Also, correct the False statement(s).

(i) Salt can be separated from salt solution by keeping it under the Sun.

True [T]
Reason: This process is evaporation, where water evaporates, leaving behind the salt.

(ii) Handpicking should be used only when the quantity of one component is less.

True [T]
Reason: Handpicking is more effective when one component is present in smaller amounts and is easily distinguishable.

(iii) A mixture of puffed rice and rice grains can be separated by threshing.

False [F]
Correction: Threshing is used for separating grains from stalks, not for separating puffed rice and rice grains.

(iv) Sieving is used to separate a mixture of mustard oil and lemon water.

False [F]
Correction: Sieving is used to separate solid particles from liquids or finer particles from coarse particles. Mustard oil and lemon water can be separated by decantation.

5. Match the mixtures in Column I with their method of separation in Column II.

Ans : 

6. In what situations would you use decantation instead of filtration to separate solids from liquids?

Decantation is used when the solid particles are heavy and settle at the bottom of the liquid. It is quicker than filtration for separating solid impurities that settle down after standing still, like in the case of mud in water or oil in water mixtures. It is especially helpful when the mixture contains two immiscible liquids: oil and water.

7. Can you relate the presence of nasal hair to any separation process?

Yes, nasal hair acts like a filter. It traps dust particles, pollutants, and other impurities from the air, much like filtration in a separation process where solid particles are separated from a liquid or gas.

8. During the COVID-19 pandemic, all of us wore masks. Generally, what material are they made of? What is the role of these masks?

Masks are generally made of materials like cotton, polypropylene, or other synthetic fibres. The role of these masks is to act as a barrier to filter out harmful particles, including viruses, bacteria, and dust, much like how filtration separates harmful substances from air or fluids.

9. A mixture containing potatoes, salt, and sawdust has been given to you. Outline a stepwise procedure for separating each component from this mixture.

Ans : 

• Step 1: Use handpicking to remove the potatoes from the mixture, as they are large and can be easily separated manually.

• Step 2: Add water to the remaining mixture of salt and sawdust. The sawdust will float on the surface, while the salt will dissolve in the water.

• Step 3: Use filtration to separate the floating sawdust from the saltwater solution.

• Step 4: To separate the salt from the water, use evaporation. Heat the saltwater solution to evaporate the water, leaving behind the salt.

10. Read the following story titled 'Intelligent Leela' and tick the most appropriate options. Provide a suitable title of your choice for the paragraph.

Leela was working on the farm with her father when she realised that they left their drinking water at home. Before her father got thirsty, she went to a nearby pond to fetch water. She noticed the water was muddy and unfit for drinking. She kept the water for some time to allow settling and then filtered/decanted the water using a piece of muslin cloth. After boiling the water, she filtered it again to ensure it was fit for drinking. She served it to her father, who appreciated her efforts.

Ans: Title Suggestion: "Leela’s Clever Water Purification Process"

Benefits of NCERT Solutions for Class 6 Science Chapter 9 Methods of Separation in Everyday Life

• Understand the definitions of mixtures, solutions, and separation methods.

• Visualise the processes through real-life examples like separating sand from water.

• Perform small experiments at home to apply these methods practically.

• Revise key terms such as decantation, filtration, and evaporation frequently.

• Draw diagrams to illustrate methods like sieving and filtration.

Important Study Material Links for Science Chapter 9 Class 6 Methods of Separation in Everyday Life

Conclusion

Chapter 9 of Class 6 Science students can learn how essential separation methods are for making mixtures useful and safe in our daily lives. It helps in building a practical understanding of how to apply these techniques in real-life situations, from cooking to cleaning. Vedantu's revision notes make it easier to grasp these concepts with relatable examples and simple explanations, helping students apply their knowledge effectively.

Chapter-wise NCERT Solutions Class 6 Science

After familiarising yourself with the Class 6 Science Chapter 9 Question Answers, you can access comprehensive NCERT Solutions from all Science Class 6 textbook chapters.

Related Important Links for Class 6 Science

Along with this, students can also download additional study materials provided by Vedantu for Science Class 6-