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प्रश्न
Differentiate between natural fibres & synthetic fibres.
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उत्तर
Natural fibres: such as cotton and wool, which were directly converted into clothing material.
Synthetic fibres: such as terylene, nylon and rayon are used in expensive clothing; carpets, etc.
संबंधित प्रश्न
Give two examples of the following substance.
Medicines
Give two examples of the following substance.
Chemical war weapons
What is the contribution of chemistry in following field?
Medicines
Name the scientists who discovered the following:
Oxygen
Food items like jams and pickles are protected by using ___________.
Write True or False against the following statement.
D.D.T. is an important fertiliser:
Explain in brief the importance of Chemistry in agriculture.
Explain in brief the importance of Chemistry in the production of various products.
Differentiate between the terms food preservatives and food processing with appropriate examples.
Give reasons for the following
Titanium dioxide is an important ingredient in cosmetics.
