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Chemistry

Chemistry
Iron is extracted from

Bauxite
Cinnabar
Dolomite
Haematite

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Chemistry
Helium gas is used in gas balloons instead of hydrogen gas because it is

More abundant than hydrogen
Lighter than hydrogen
More stable
Non-combustible

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Chemistry
A colloidal system in which a liquid is dispersed in a liquid is called

Gel
Precipitate
Emulsion
Sol

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Chemistry
How many electrons can be accommodated in d-orbital

8
3
6
10

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Chemistry
The lowest layer of earth's atmosphere is

Mesosphere
Stratosphere
Troposphere
Ionosphere

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Chemistry
Peroxyacetyl nitrate is a

Vitamin
Acidic dye
Plant hormone
Secondary pollutant

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MORE MCQ ON Chemistry

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