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Chemistry

Chemistry
Carborundum is another name of

Calcium carbide
Silicon carbide
Silicon oxide
Calcium oxide

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Chemistry
An alloy used in making heating elements for electric heating device is

Alloy Steel
German Silver
Nichrome
Solder

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Chemistry
Catalytic converters are generally made from :

Transition metals
Hydrogen
Carbon
Alkaline metals

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Chemistry
Ultraviolet radiation striking the earth is due to the depletion of

Ozone
Oxygen
Carbon monoxide
Carbon dioxide

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Chemistry
If lime water is kept in the air, it turns milky due to presence of :

Nitrogen
Carbondioxide
Oxygen
Sulphurdioxide

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Chemistry
Which of the following pollutants is main product of automobile exhaust ?

NO
Hydrocarbons
CO2
CO

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