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Chemistry

Chemistry
Magnetite is

2Fe2O3. 3H2O
FeCO3
Fe2O3
Fe3O4

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Chemistry
What is the covalency of nitrogen in ammonia molecule

5
2
3
4

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Chemistry
For extinguishing fire, we use

Hydrogen
Marsh gas
Carbon Monoxide
Carbon Dioxide

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Chemistry
The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is

functional group isomerism
chain isomerism
positional isomerism
metamerism

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Chemistry
Iron is extracted from

Dolomite
Cinnabar
Haematite
Bauxite

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Chemistry
Heavy metal pollution of water is caused by:

Domestic sewage
Paints
Acid Plants
Wood burning

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