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प्रश्न
Give reasons for the following
Cosmetics may contain preservatives, as one of their ingredients.
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उत्तर
They extend the shelf life of a cosmetic and may prevent growth of microorganisms.
संबंधित प्रश्न
Give two examples of the following substance.
Medicines
Give two examples of the following substance.
Building materials
How is chemistry helpful in improving the health of human beings?
Name the chemicals which help in increasing food production.
What is the contribution of chemistry in following field?
Medicines
Name the scientists who discovered the following:
Oxygen
Write True or False against the following statement.
Antibiotics are used as preservatives:
Explain the term ‘cosmetics’ ‘talc’. Name a few main ingredients in cosmetics the role they play.
Give reasons for the following
Titanium dioxide is an important ingredient in cosmetics.
Give reasons for the following
Polyester is added to natural fiber cotton, to give terylene.
