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Chemistry

Chemistry
The important ore of aluminium is

Fluorspar
Cryolite
Haematite
Bauxite

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Chemistry
The depletion of Ozone layer is mainly due to

Aviation fuels
Chlorofluorocarbons
Volcanic eruptions
Radioactive rays

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Chemistry
It is dangerous to leave the car engine running in a closed garage, because it may cause serious pollution due to poisoning by emission of

CO
SO2
Unburnt petrol
CO2

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Chemistry
Which one of the following is a micro-element ?

Nitrogen
Chlorine
Oxygen
Hydrogen

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Chemistry
The gas used in the artificial ripening of fruits is

Ethane
Methane
Butane
Acetylene

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Chemistry
Tear gas used by the police to disperse the mob contains

Chlorine
Carbon dioxide
Hydrogen sulphide
Ammonia

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MORE MCQ ON Chemistry

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