NCERT Solutions for Class 6 Science Chapter 3 - Separation of Substances

1. Why Do We Need to Separate Different Components of the Mixture? Give Two Examples.

Ans: We need to separate harmful or non-useful components of a mixture that may be mixed with it to obtain a better mixture. Sometimes, even useful components are often separated if we’d like to use them separately.

Example: separating stones from rice, Separating tea leaves with a strainer.

2. What is Winnowing? Where is it Used?

Ans: The process of separation of heavier and lighter components of a mix by wind or blowing air is known as winnowing. Farmers use the method of winnowing to separate husk particles from seeds of grains.

3. How Will You Separate Husk or Dirt Particles from a Given Sample of Pulses Before Cooking?

Ans: The method of handpicking is used for separating Husk or dirt particles from a sample of pulses. Handpicking is a process by which slightly large-sized particles can be separated.  We chose to handpick when the impurities were less.

4. What Is Sieving? Where Is It Used?

Ans: Sieving allows the particles to pass through the holes of the sieve while bigger impurities remain on the sieve thus this process allows to separate of particles which differ in their size. It is mainly used in flour mills to remove impurities like stones and husk.

5. How Will You Separate Sand and Water from Their Mixture?

Ans: The process of sedimentation and decantation can be used for the separation of sand and water from their mixture. Allow the mixture of sand and water to stand still in the container until the sand settles at the bottom. Now a layer of sand and a layer of water is formed in the container.  Now gently, pour the water into another container. Thus, we can separate them.

6. Is it Possible to Separate Sugar Mixed With Wheat Flour? If Yes, How Will You Do It?

Ans: Sugar mixed with wheat flour can be separated. So, it is possible. This can be done by the process of sieving as the particles of wheat flour differ in size from sugar.

7. How Would You Obtain Clear Water from a Sample of Muddy Water?

Ans: The process of filtration can be used in order to obtain clear water from the sample of muddy water. For this process, muddy water is allowed to pass through a filter paper. Where the mud is collected on the filter paper and water passes through it.

8. Fill up the Blanks:

1. The method of separating seeds of paddy from its stalks is called----------.

Ans: The method of separating seeds of paddy from its stalks is called threshing.

2. When milk, cooled after boiling, is poured onto a piece of cloth the cream is left behind on it. This process of separating cream from milk is an example of----------.

Ans: When milk, cooled after boiling, is poured on to a piece of cloth the cream is left behind on it. This process of separating cream from milk is an example of filtration.

3. Salt is obtained from seawater by process of----------.

Ans: Salt is obtained from seawater by process of evaporation.

4. Impurities settled at the bottom when muddy water was kept overnight in a bucket. The clear water was then poured off from the top. The process of separation used in this example is called----------.

Ans: Impurities that are settled at the bottom when muddy water is kept overnight in a bucket. The clear water was then poured off from the top. The process of separation used in this example is called sedimentation and decantation.

9. True/False.

1. A mixture of milk and water can be separated by filtration.

Ans: False

2. A mixture of powdered salt and sugar can be separated by the process of winnowing.

Ans: False

3. Separation of sugar from tea can be done with filtration.

Ans: False

4. Grain and husk can be separated with the process of decantation.

Ans: False

10. Lemonade is Prepared by Mixing Lemon Juice and Sugar in Water. You Wish to Add Ice to Cool It. Should You Add Ice to the Lemonade Before or After Dissolving Sugar? in Which Case Would it Be Possible to Dissolve More Sugar?

Ans: We should add ice only after dissolving sugar in lemonade. In this case, more sugar will be dissolved. The solubility depends on the temperature. Without adding ice, the temperature is high so more sugar can be dissolved. When we add ice to this it gets cool and less sugar will dissolve in it.

NCERT Chapter 3 Separation of Substances Class 6 - Quick Overview of Detailed Structure of Topics

Class 6 Science Separation of Substances - Important Points

• Handpicking:

• Handpicking involves manually separating substances based on their physical properties, such as size, shape, or color.

• It is commonly used for separating larger particles from a mixture.

• Winnowing and Threshing:

• Winnowing is a method used to separate heavier particles from lighter particles by using air currents.

• Threshing involves separating grains from the stalks or husks.

• Sieving:

• Sieving is the process of separating solid particles of different sizes using a sieve or mesh.

• It is commonly used in the kitchen for separating flour from larger particles or impurities.

• Sedimentation and Decantation:

• Sedimentation is the process of allowing heavier particles to settle at the bottom of a mixture.

• Decantation involves carefully pouring off the upper layer of liquid, leaving behind the settled particles.

• Filtration:

• Filtration is a method used to separate insoluble solids from liquids by passing the mixture through a filter paper or mesh.

• It is commonly used in laboratories and water treatment plants.

• Evaporation and Condensation:

• Evaporation involves the conversion of a liquid into vapor by heating, leaving behind the solid particles dissolved in the liquid.

• Condensation is the process of converting vapor back into liquid by cooling.

Benefits of Vedantu’s Separation of Substances Class 6 Questions and Answers PDF

• Vedantu's Class 6 Separation of Substances Question Answers offers detailed and comprehensive explanations of the topics covered in the chapter.

• Class 6 Science Chapter 3 Question Answer covers essential concepts such as methods of separation, including filtration, evaporation, sedimentation, decantation, and more.

• Separation of Substances Class 6 Questions and Answers serve as an efficient tool for last-minute revisions. The structured format allows students to quickly review important points, helping them consolidate their knowledge effectively.

• Science Class 6 Chapter 3 Question Answer follows a well-organized format, facilitating easy navigation through different topics within the chapter.

• Whether it's understanding the process of sieving or learning about the separation of substances in mixtures, students can access information easily.

• Separation of Substances Class 6 Solutions offer step-by-step methods for solving problems related to the separation of substances.

• By utilizing the Class 6 Science Chapter 3 PDF, students can prepare effectively for examinations. The solutions cover all topics and questions likely to be asked in assessments, ensuring comprehensive exam preparation.

Important Study Material Links for Class 6 Science Chapter 3 Separation of Substances

Conclusion

Vedantu’s NCERT Solutions for Class 6 Science Chapter 3: Separation of Substances offers a clear and straightforward approach to understanding the topic. The solutions emphasize the importance of learning various methods of separating different substances, such as handpicking, winnowing, sieving, sedimentation, decantation, filtration, and evaporation. By focusing on these methods, students can grasp the fundamental concepts easily. Additionally, the solutions provide step-by-step explanations, making it easier to follow along. In previous year's question papers, approximately 5–7 questions were typically asked from this chapter. Utilizing these solutions effectively can help students strengthen their understanding and excel in their science studies.

NCERT Solutions for Class 6th Science Chapter-wise Link

Other Important Study Materials for Class 6 Science

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