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प्रश्न
Explain the term ‘cosmetics’ ‘talc’. Name a few main ingredients in cosmetics the role they play.
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उत्तर
Cosmetics are mixtures of chemical compounds from natural sources or from synthetic sources.
Cosmetics - enhance or alter the appearance or fragrance of an individual. Some sources of compounds used in cosmetics include – modified natural oils and fats, processed minerals e.g. – zinc oxide, iron oxide, and talc.
Talc :
1. Talcum powder is made from talc – a mineral made up of – hydrated magnesium silicate, (contains elements – magnesium silicon, oxygen).
2. In its natural form – talc contains asbestos–which is removed from consumer products.
3. Talc – absorbs moisture, cuts down on friction, keeps skin dry and prevents rashes
संबंधित प्रश्न
Give two examples of the following substance.
Food preservatives
What is the contribution of chemistry in following field?
Medicines
Name the scientists who discovered the following:
Safety lamp
_____________ help to increase the production of food.
Write True or False against the following statement.
D.D.T. is an important fertiliser:
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.
Differentiate between natural fibres & synthetic fibres.
Preservatives are added to food or beverages.
Give reasons for the following
Polyester is added to natural fiber cotton, to give terylene.
