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प्रश्न
_____________ help to increase the production of food.
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उत्तर
Fertilizers help to increase the production of food.
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संबंधित प्रश्न
Give two examples of the following substance.
Building materials
Give two examples of the following substance.
Chemical war weapons
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 Dimitri Mendeleev
State the contributions of Antoine Lavoisier
Explain the term ‘cosmetics’ ‘talc’. Name a few main ingredients in cosmetics the role they play.
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.
