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

Ever noticed your elders separating tiny stones or unwanted substances from wheat or rice, separating tea leaves from tea, purifying sandy water, etc. In our daily life, we come across mixtures of various substances and separation becomes essential to remove unwanted substances from useful substances and make them useful. Various techniques are used to separate unwanted substances from useful substances depending upon the types of substances and impurities present in them. Like handpicking is used to separate small stones from rice, winnowing is used to separate lighter impurities like husk from heavier grains, decantation is used to purify a liquid by settling down impurities at the bottom and filtration is used to separate insoluble solid compounds from the liquid.

NCERT Class 6 Science Chapter 9 Methods of Separation in Everyday Life,is all about different methods of separating impurities from useful substances and how different methods are selected to separate impurities substances based on the type of substance and impurities present in them. Methods of separation in everyday life help students to develop analytical and problem-solving skills. This chapter not only just helps them to score good marks in exams but also forms the basis of some advanced chapters and topics that students are going to study in higher classes.

This chapter explains the methods of separation used to separate impurities from substances. At the end of this chapter, text questions are provided with detailed solutions to each question in a very comprehensive and systematic way. These NCERT Solutions provide easy-to-understand and comprehensive explanations of every question. It will help students to develop analytical and problem-solving abilities.

NCERT Solutions for Class 6 Science Chapter 9 - Methods of Separation in Everyday Life (Exercise Question)

Q1. What purpose does handpicking serve in the process of separation?

(i) Filtration

(ii) Sorting

(iii) Evaporation

(iv) Decantation

Ans. (ii). Sorting is correct answer

Because handpicking is used to sort or remove unwanted substances.

Q2. Which of the following substances are commonly separated using the churning method?

(i) Oil from water

(ii) Sand from water

(iii) Cream from milk

(iv) Oxygen from air

Ans. (iii). Cream from milk is correct answer

Because when milk is churned the lighter cream is separated from milk

Q3. Which factor is usually essential for the filtration?

(i) Apparatus size

(ii) Presence of air

(iii) Pore size

(iv) Temperature of the mixture

Ans. (iii). Pore size is the correct answer

Because Filtration is used to separate solid from liquid using filter and pore size of the filter paper is most important factor

Q4. 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.

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

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

(iv) A mixture of mustard oil and lemon water can be separated by decantation.

(v) Sieving is used to separate a mixture of rice flour and water.

Ans. (i). True

Reason: Salt will left behind after evaporation of water

Ans. (ii). True

Reason: When impurities are less in quantity and can be easily identified then only handpicking is used

Ans. (iii). False

Reason: Threshing is used to separate harvested stalk from grain. Not to separate two types of grains.

Correct statement : A mixture of puffed rice and rice grains can be separated by winnowing.

Ans. (iv). True

Reason : Mustard oil and lemon water do not mix, so they can be separated by decantation

Ans. (v). False

Reason: Because sieving is used to separate solids of different kinds

Correct statement: Filtration is used to separate a mixture of rice flour and water

Q5. Match the mixtures in Column I with their method of separation in Column II.

Ans.

(i) - (d)

(ii) - (e)

(iii) - (a)

(iv) - (b)

(v) - ( c)

Q6. In what situations would you use decantation instead of fIltration to separate solids from liquids?

Ans. Decantation is used to separate impurities from liquid, meaning when impurities are heavy in solution then after some time these heavy impurities settle down leaving pure liquid and that liquid can be easily separated. Example sand settled down at the bottom of a glass of water.

Q7. Can you relate the presence of nasal hair to any separation process?

Ans. Nasal hairs are like a natural filter that prevents dust particles or other impurities entering into our body through the nose. This process is similar to filtration method, in filtration method filter paper separates solid from liquid.

Q8. During the COVID-19 pandemic, all of us wore masks. Generally, what material are they made of? What is the role of these masks?

Ans. Masks are made up of non-woven fabrics, cotton and polyester. Masks act as protective shields that filter air, pollen and germs entering our body. The role of these masks is to filter air particles, pollens, etc.

Q9. A mixture containing potatoes, salt and sawdust has been given to you. Outline a stepwise procedure for separating each component from this mixture.

Ans. The following steps are given to separate potatoes, salt, and saws and :

• 1). Handpicking of potatoes
• 2). To dissolve salt we have to add water as salt is soluble in water and sawdust is not
• 3). Filter solution to separate sawdust from solution
• 4). To obtain salt evaporate water

Q10. 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 in the farm with her father when she realised that they left their drinking water at home. Before her father felt thirsty/hungry, she went to the nearby pond to fetch some water/grains. After obtaining some water in the container, she noticed that the water was muddy and fit/unfit for drinking. To purify the water, she kept it for some time and then she filtered/ churned the muddy water using a piece of paper/muslin cloth. Leela, then, cooled/boiled the water for about 10 minutes in a covered pan. After cooling/boiling, she filtered/churned it again and made it fit/unfit for drinking. She served this water to her father while having food, who blessed her and appreciated her efforts

Ans.

1. Thirsty
2. Water
3. Unfit
4. Filtered
5. Muslin cloth
6. Boiled
7. Cooling
8. Filtered
9. Fit

How to solve NCERT Class 6 Science Chapter 9 questions effectively?

To solve the questions of this chapter effectively, one should begin by understanding the purpose of separating substances; such as removing impurities, obtaining useful components, or purifying mixtures. Familiarize yourself with common methods like handpicking, threshing, winnowing, sieving, filtration, etc. Also, learn the real-life examples (e.g., separating tea leaves using a strainer or rice stones by handpicking) so that you can connect with the concepts easily. While approaching the question, first underline the information given in the question. Then make the answer effective by stating the method, purpose and its application. You can also practice drawing simple diagrams for effective learning.

NCERT Solutions for Class 6 Science Chapter-wise

Below are the chapter-wise solutions-

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

‘Methods of Separation in Everyday Life’ is all about the methods used to separate different substances. It teaches us about how to separate unwanted substances from mixtures to make them usable using different techniques like handpicking, winnowing, filtration, decantation, sieving, evaporation, and the use of magnets. All these techniques are not only used in the kitchen or classroom, but they also form the basis of higher classes like metallurgy in higher classes.

Practice Questions for Class 6 Science Methods of Separation in Everyday Life

The following are some practice questions for you,

Q1. Which method would you use to separate sand from water? Explain.
Answer:
Filtration is used to separate sand from water. A filter paper is placed in a funnel, and the mixture is poured through it. The sand stays on the filter paper as residue, and clear water passes through as filtrate.

Q2. How is winnowing used in daily life?
Answer:
Winnowing is used to separate lighter husk particles from heavier grains like wheat or rice. The mixture is dropped from a height in the air. The wind blows the lighter husk away while the heavier grains fall straight down.

Q3. Name a method used to separate salt from seawater. Why does it work?
Answer:
Evaporation is used to separate salt from seawater. Water evaporates when heated or left in the sun, leaving the salt behind because salt does not evaporate.

Q4. What method would you use to separate iron nails from a mixture of sand and iron nails?
Answer:
Magnetic separation is used. A magnet is moved over the mixture. The iron nails stick to the magnet and get separated from the sand.

Q5. Explain decantation with an example.
Answer:
Decantation is the process of pouring out clear liquid from a container without disturbing the sediment. For example, when muddy water is left undisturbed, the mud settles at the bottom and the clean water on top can be poured off.

NCERT Solutions class 6 Subject Wise -Links

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