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

NCERT Solutions for Class 6 Science Chapter 9: Download PDF

Students can download the NCERT Solutions for Class 6 Science Chapter 9 Methods of Separation in Everyday Life in PDF format for free. Class 6 Science Chapter 9 solutions PDF is designed to help students understand the fundamental concepts and solve textbook questions with ease.

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NCERT Solutions for Class 6 Science Chapter 9 (Exercise Questions with Answers)

Methods of separation in everyday life Class 6 important questions and answers are given below. You can access the complete NCERT solutions for Class 6 Science Chapter 9 exercise questions.

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

(i) Filtration

(ii) Sorting

(iii) Evaporation

(iv) Decantation

Answer:

(ii). Sorting is the correct answer

Handpicking is used to sort or remove unwanted substances.

Question 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

(iv) Oxygen from air

Answer:

(iii). Cream from milk is the correct answer

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

Question 3. Which factor is usually essential for the filtration?

(i) Apparatus size

(ii) Presence of air

(iii) Pore size

(iv) Temperature of the mixture

Answer:

(iii). Pore size is the correct answer

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

Question 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 in 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.

Answer:

(i). True

Reason: Salt will be left behind after the evaporation of water

Answer:

(ii). True

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

Answer:

(iii). False

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

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

Answer:

(iv). True

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

Answer:

(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

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

Answer:

(i) - (d)

(ii) - (e)

(iii) - (a)

(iv) - (b)

(v) - ( c)

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

Answer:

Decantation is used to separate impurities from liquid, meaning that 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.

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

Answer:

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

Question 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?

Answer:

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

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

Answer:

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 the solution to separate the sawdust from the solution
• 4) To obtain salt, evaporate water

Question 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 had 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

Answer:

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

NCERT Solutions for Class 6 Science Chapter 9 ( Activities)

Given below are the activities covered in NCERT Class 6 Science Chapter 9. These Chapter 9 Class 6 Methods of Separation in Everyday Life Science solutions provide a perfect blend of conceptual and practical knowledge.

Activity 9.1 Page Number -165

Question 1. Take a handful of roasted peanuts and rub them between your palms. What happens?

Answer:

When we rub roasted peanuts between your palms, the skin of the peanuts comes off.

Question 2. Is it possible to separate the removed skin and the peanuts?

Answer:

Yes, it is possible to separate the removed skin and the peanuts.

Question 3. Now, try blowing it. What do you observe?

Answer:

When we blow air, the lighter peanut skins are blown away while the heavier peanuts remain. This shows that blowing air can separate heavier and lighter components of a mixture.

Question 4. Which of these components removed peanut skins or are peanuts blown away?

Answer:

The removed peanut skins are blown away because they are lighter than the peanuts.

Question 5. How do you think farmers separate so many grains from husk?

Answer:

Farmers traditionally use a bamboo tray to separate heavier and lighter components like grains from husk by winnowing, which uses the wind or air movement to separate them.

Activity 9.2 Page Number 168

Take a bowl or any container and fill it half with water Curiosity.

Add 2–3 teaspoons of salt into it and stir till the salt dissolves to form a solution.

Take a small piece of black or dark coloured thick paper and spread a few drops of the salt solution on it (Fig. 9.7a).

You can also create any art of your choice with this salt solution. Allow it to dry and then observe it (Fig. 9.7b and Fig. 9.7c)

(a) Before drying

(b) After drying

(c) Art created

Fig. 9.7: A few drops of salt solution spread on thick black paper

Question1. Do you observe some patches on the paper?

Answer:

Yes, we observe white patches or marks on the paper where the salt solution was applied.

Question 2. What do you think is left on the paper?

Answer:

The white patches on the paper are salt crystals. When the water evaporated, the dissolved salt was left behind.

Question 3. You can feel the presence of salt by touching the paper. Where has the water disappeared?

Answer:

The water has evaporated into the air. Only the salt, which does not evaporate, is left on the paper.

Activity 9.3 Page - 169

Take some salt solution (prepared in Activity 9.2) in a china dish.

If a china dish is not available, another suitable vessel may be used.

Heat and let the water boil away as shown in Fig. 9.8. Allow the china dish to cool down.

Fig. 9.8: Heating of china dish containing salt solution

Question 1. What do you observe? What is left in the china dish?

Answer:

After heating, the water in the salt solution boils away, and white salt crystals are left behind in the china dish.

Question 2. Did you get the salt back? You can feel the presence of salt in the china dish by touching the salt with your fingers.

Answer:

Yes, we got the salt back. The salt can be seen and felt as white crystals in the dish after the water evaporates.

Activity 9.4 Page- 171

Try to fold the filter paper yourself and make a cone as shown in Fig. 9.10.

Fig. 9.10: Folding a filter paper to form a cone

Place it inside a funnel kept on a conical flask and pour muddy water into it (Fig. 9.11)

Fig. 9.11: Filtration

Question 1. What do you observe?

Answer:

The muddy water slowly passes through the filter paper, and clear water collects in the conical flask. The mud particles remain on the filter paper.

Question 2. Do the mud particles pass through the filter paper?

Answer:

No, the mud particles do not pass through the filter paper. They get trapped on the paper, while only the clean water passes through.

Activity 9.6 Page -175

Write the following phrases on small slips of paper

1. Separating small stones from pulses.

2. Churning curd to obtain butter.

3. Taking out green chillies from cooked dalia (dish made of broken wheat) or poha (dish made of flattened rice).

4. Taking out seeds from watermelon.

5. Sorting piles of sawdust and iron nails from a mixed heap of building material.

6. Picking marigold flowers from a heap of other flowers to make a garland.

7. Separating pebbles from sand.

8. Separating coconut pieces from rice flour.

9. Separating oil from water.

10. Separating salt from salt solution

Now, take two baskets, each representing one of the two purposes for which we separate substances. Form two teams and see who will get the maximum correct entries.

Answer:

Below are two baskets representing two different purposes of separating substances.

Note: Activity 9.5 Page- 172 involves designing and creating a working model of a water filter using low-cost materials. As it is a hands-on activity, it cannot be answered here.

Practice Questions for Class 6 Science Chapter 9

Some important practice questions related to the NCERT Class 6 Science Chapter 9 are given below. Students can also, download the Class 6 Science Chapter 9 solutions PDF .The questions included in Methods of separation in everyday life Class 6 PDF have a high probability of being asked in future exams.

Question 1: 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.

Question 2: 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.

Question 3: 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.

Question 4: 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.

Question 5: 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.

Approach to Solve the Question of Class 6 Science Chapter 9

The NCERT Solutions for Class 6 Science Chapter 9 Methods of Separation in Everyday Life helps students understand how simple techniques can separate different components of mixtures, and how it is useful in daily chores. We can follow the steps given below to the NCERT solutions for Class 6 Chapter 9 Science.

1. Know the purpose of separation:

Before studying anything it is very important to understand the purpose behind it. So start by understanding why we need to separate substances, like removing impurities or collecting useful components? What type of impurities are present, and how is it different from the useful material? After that study methods such as handpicking, threshing, winnowing, sieving, sedimentation, decantation, filtration, and evaporation.

2. Relate the techniques with a daily life example:

Try to connect scientific methods with everyday activities like Winnowing to separate husk from grain, Sieving flour to remove bran and Evaporating salt water to obtain salt.

3. Understand how one purification will involve different techniques:

While solving questions it is important to remember that simple separation task may require combination of methods. For example, to purify muddy water multiple methods, like sedimentation, followed by decantation, then filtration are used.

4). Practicing the questions
Practice different types of questions from Methods of separation in everyday life Class 6 important questions and answers that helps you to develop a proper understanding of the concepts provided in the textbook. Chapter 9 Class 6 Methods of separation in everyday life Science solutions will help you in practicing the questions effectively.

5). Review yourself
Identify your weaknesses in NCERT Class 6 Science Chapter 9 and focus on those parts. Also, practice Methods of separation in everyday life Class 6 important questions and answers

Topics and Subtopics Covered in the NCERT Textbook

All the topics and subtopics covered in the NCERT Solutions for Class 6 Science Chapter 9 Methods of Separation in Everyday Life are given below. A basic understanding of these topics helps students to solve complex problems easily. Students can also refer Class 6 Science Chapter 9 solutions PDF.

• Need for separation
• Methods of Separation
• Common Separation Techniques
• Soluble and Insoluble Substances
• Application in Daily Life

NCERT Solutions of Class 6 Science Chapter 9 Summary

The NCERT solutions for Class 6 Chapter 9 Science are 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.

NCERT Solutions for Class 6 Science Chapter-Wise

Besides NCERT Solutions for Class 6 Science Chapter 9 Methods of Separation in Everyday Life, chapter-wise solutions are given below:

NCERT Solutions for Class 6 Subject-Wise

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NCERT Book and NCERT Syllabus

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