Separation of Substances - Class 6 Science - Chapter 3 - Notes, NCERT Solutions & Extra Questions
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Extra Questions - Separation of Substances | NCERT | Science | Class 6
Why do we separate substances in a mixture?
i) To separate two different but useful components.
ii) To remove useless components.
iii) To remove impurities.
A) Only (i) and (ii) are correct.
B) Only (ii) and (iii) are correct.
C) Only (i) and (iii) are correct.
D) (i), (ii), and (iii) are all correct.
The correct answer is Option D:
(i) To separate two different but useful components
(ii) To remove useless components
(iii) To remove impurities
All of the above reasons are correct causes for separating substances in a mixture. Subsequently, we often need to separate mixtures for various reasons, such as:
Obtaining valuable or usable components, like extracting drinking water from seawater.
Eliminating components that are not needed or could be harmful if included in the end product.
Purifying substances by removing impurities that may affect the quality or safety of a product.
Example:
Consider seawater; it contains salt, which is vital for culinary uses and as an electrolyte in our diet. Direct consumption or use of seawater isn't feasible due to its impurities and excess minerals. Thus, the salt is extracted and purified through the process of separation.
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What is the proper definition for winnowing?
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"What is the difference between soluble and miscible?"
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How can you separate the mixture of sand and water?
A Threshing
B Evaporation
C Decantation
D Sedimentation
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Alloys cannot be separated by physical means because, even though they are considered mixtures, the components are intimately mixed at the atomic level.
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Ask Chatterbot AIQuestions & Answers - Separation of Substances | NCERT | Science | Class 6
Why do we need to separate different components of a mixture? Give two examples.
We need to separate different components of a mixture for two main reasons: to remove harmful or non-useful substances mixed with it and sometimes to use the useful components separately. For example, during the preparation of tea, tea leaves are separated from the liquid using a strainer to remove the non-useful solid particles. In agriculture, grain is separated from stalks during harvesting to use the grain for food, while the stalks can serve other purposes like fodder.
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True or false?
(a) A mixture of milk and water can be separated by filtration.
(b) A mixture of powdered salt and sugar can be separated by the process of winnowing
(c) Separation of sugar from tea can be done with filtration.
(d) Grain and husk can be separated with the process of decantation.
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Ask Chatterbot AINotes - Separation of Substances | Class 6 NCERT | Science
Separation of Substances: Comprehensive Class 6 Notes
Introduction
In our daily lives, we often need to separate substances for various purposes. Whether it's removing tea leaves from tea or extracting butter from curd, understanding these processes is essential.
Why Do We Separate Substances?
Purpose of Separation
The separation of substances is crucial for multiple reasons:
To remove harmful or non-useful components.
To separate useful substances that need individual use.
To clean and purify materials before use.
In many instances, different materials are mixed, requiring us to use specific methods to separate them effectively....
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