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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.
Fuel
Give two examples of the following substance.
Fungicides
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?
Industry
What is the contribution of chemistry in following field?
Medicines
Name the scientists who discovered the following:
Safety lamp
Write True or False against the following statement.
Antibiotics are used as preservatives:
Choose the correct alternative from the choices given below for the following statement:
Mortar is used as a
Explain how medicines are a boon to mankind. State the positive & negative effects of medicines like aspirin and paracetamol.
