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प्रश्न
Choose the correct alternative from the choices given below for the following statement:
Mortar is used as a
पर्याय
plastic material Urea is an
a building material
an insecticide
as medicine
उत्तर
a building material
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संबंधित प्रश्न
Give two examples of the following substance.
Chemical war weapons
Name the scientists who discovered the following:
Safety lamp
Fill in the blank:
L.P.G. is used for ___________
Write True or False against the following statement.
D.D.T. is an important fertiliser:
Differentiate between natural fibres & synthetic fibres.
Explain how medicines are a boon to mankind. State the positive & negative effects of medicines like aspirin and paracetamol.
Give reasons for the following
Titanium dioxide is an important ingredient in cosmetics.
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.
Give reasons for the following
Polyester is added to natural fiber cotton, to give terylene.
