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Chemistry

Chemistry
A thick paste of cement, sand and water is called

Concrete
R.C.C.
Kiln
Mortar

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Chemistry
The metal used to galvanise iron to protect it from rusting is

Chromium
Antimony
Zinc
Lead

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Chemistry
The most abundant element in the human body is

Oxygen
Nitrogen
Carbon
Iron

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Chemistry
A polymeric substance used to make parachute is

Cotton
Terylene
Rayon
Viscose

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Chemistry
Warming Ammonium chloride with sodium hydrochloride in a test tube is an example of

Isothermal system
Isobaric system
Open system
Closed system

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Chemistry
The acid which fails to liberate carbon dioxide from sodium bicarbonate is :

Carbonic acid
Formic acid
Acetic acid
Sulphuric acid

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