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प्रश्न
Give reasons for the following
Cosmetics may contain preservatives, as one of their ingredients.
उत्तर
They extend the shelf life of a cosmetic and may prevent growth of microorganisms.
संबंधित प्रश्न
Give two examples of the following substance.
Fuel
What is the contribution of chemistry in following field?
Cosmetics
Name the scientists who discovered the following:
Atoms
Write True or False against the following statement.
D.D.T. is an important fertiliser:
State the contributions of John Dalton – towards the development of Chemistry.
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
Aspirin is one of the most widely used medications – globally.
Give reasons for the following
Ordinary soap is wasted in hard water.
