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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.
Food preservatives
Name the chemicals which help in increasing food production.
Food items like jams and pickles are protected by using ___________.
Fill in the blank:
L.P.G. is used for ___________
Fill in the blank:
Inert gases were discovered by ___________
Explain how medicines are a boon to mankind. State the positive & negative effects of medicines like aspirin and paracetamol.
Preservatives are added to food or beverages.
Give reasons for the following
Ordinary soap is wasted in hard water.
Give reasons for the following
Cosmetics may contain preservatives, as one of their ingredients.
Select the correct name from the choices given below for the following case.
A synthetic fibre used in clothing.
