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Chemistry

Chemistry
What is the principal ore of aluminium ?

Dolomite
Copper
Lignite
Bauxite

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Chemistry
Helium gas is filled in ballons because

It is a noble gas
It is lighter than air
Its atomic number is 2
It is one of the constitutents of water

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Chemistry
Brass is made of

Copper and zinc
Copper, tin and zinc
Tin and lead
Copper and tin

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Chemistry
In upper layer of atmosphere ozone is formed by

The action of ultraviolet rays on oxygen
The action of nitrogen on oxygen in atmosphere
The combination of oxygen molecules
Subjecting oxygen to high pressure

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Chemistry
In electro-refining, the pure metal is deposited on

Anode
Cathode
Vessel
Electrolyte

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Chemistry
Cloud is a colloidal dispersion of

Fog in a dispersion medium of water
Water drops in a dispersion medium of air
Air in a dispersion medium of water
Mist in a dispersion medium of air

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MORE MCQ ON Chemistry

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