NCERT Solutions for Class 6 Science Chapter 5
Important NCERT Questions
Class 6th Chapter 6 Separation of Substances
NCERT Books for Session 2022-2023
CBSE Board and State Board
Questions No: 1
Why do we need to separate different components of a mixture? Give two examples.
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Before using a substance, we need to separate harmful or non-useful substances that may be mixed with it. Sometimes, we separate even useful components if we need to use them separately.
For example:
• We used to separate slightly larger sized impurities like the pieces of dirt, stone, and husk from wheat, rice or pulses by handpicking method.
• Rice or pulses are usually washed before cooking. When we add water to these, the impurities like dust and soil particles get separated.
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Separating components in a mixture is crucial for various reasons:
– Purity: Separation helps obtain pure substances by removing impurities.
– Specific Use: It allows us to extract valuable components for specific purposes.
For instance, separating salt from seawater provides pure salt for consumption, and extracting metals from electronic waste enables recycling of valuable materials like gold and copper, reducing environmental impact.