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प्रश्न
Write True or False against the following statement.
D.D.T. is an important fertiliser:
विकल्प
True
False
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उत्तर
False
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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?
Clothing
What is the contribution of chemistry in following field?
Cosmetics
What is the contribution of chemistry in following field?
Medicines
_____________ help to increase the production of food.
State the contributions of Antoine Lavoisier
Explain the term ‘cosmetics’ ‘talc’. Name a few main ingredients in cosmetics the role they play.
Explain how medicines are a boon to mankind. State the positive & negative effects of medicines like aspirin and paracetamol.
Give reasons for the following
Polyester is added to natural fiber cotton, to give terylene.
