NCERT Solutions Class 6 Science Chapter 5 Separation of Substances – Here are all the NCERT solutions for Class 6 Science Chapter 5. This solution contains questions, answers, images, explanations of the complete chapter 5 titled Separation of Substances of Science taught in class 6. If you are a student of class 6 who is using NCERT Textbook to study Science, then you must come across chapter 5 Separation of Substances. After you have studied lesson, you must be looking for answers of its questions. Here you can get complete NCERT Solutions for Class 6 Science Chapter 5 Separation of Substances in one place.
NCERT Solutions Class 6 Science Chapter 5 Seperation Of Substances
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For a better understanding of this chapter, you should also see summary of Chapter 5 Seperation Of Substances , Science, Class 6.
Seperation Of Substances
NCERT Solutions Class 6 Science chapter 5 Seperation Of Substances
Class 6, Science chapter 5, Seperation Of Substances solutions are given below in PDF format. You can view them online or download PDF file for future use.
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Question & Answer
Q.1: Why do we need to separate different components of a mixture? Give two examples.
Ans : Different components of a mixture are separated in unrequired components from a mixture or sometimes, useful components from a mixture. order to either separate the to separate more than one useful components from mixture. For example, grain purchased from shops can contain several impurities such as pieces of stone, husk, broken grains, etc. Thus, grain is separated from these impurities to make it edible. Similarly, after preparing tea, we strain it to remove the used tea leaves from tea.
Q.2: What is winnowing? Where is it used?
Ans : Winnowing is the process of separation of the heavier components from the lighter components of a mixture by wind or by blowing air. It is generally used by farmers to separate the lighter impurities such as husk particles from the heavier grains.
Q.3: How will you separate husk or dirt particles from a given sample of pulses before cooking?
Ans : The dirt particles that are present in the pulses are removed by washing the latter with water. Being heavier, the pulses settle down, while the dirt particles being lighter keep floating in water. This process is called sedimentation. The dirty water can be removed by the method of decantation, leaving the pulses at the bottom.
Q.4: What is sieving? Where is it used?
Ans : Sieving is the method of separation of fine particles from bigger particles by allowing the finer particles to pass through the holes of a sieve, leaving the bigger particles in the sieve itself. It is generally used in homes to separate flour from impurities such as pieces of stone, stalk, and husk. It is also used at construction sites to separate sand from small stones.
Q.5: How will you separate sand and water from their mixture?
Ans : Sand is not soluble in water. Hence, the mixture of sand and water can be separated by two methods: 1. Combination of sedimentation and decantation: As sand is insoluble and heavier than water, it settles down at the bottom of the container containing the mixture. This process is called sedimentation. After the process of sedimentation is complete, water is slowly transferred to another container and sand remains in the original container. This process is called decantation. 2. Filtration: the mixture is poured on a strainer or a piece of cloth or a filter paper so that the water goes through the strainer and the sand remains on the strainer.
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