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Chemistry

Chemistry
The common refrigerant in domestic refrigerator is

Neon
Oxygen
Freon
Nitrogen

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Chemistry
The chief source for the production of nitrogeneous fertilizers is :

Nitrogen
Ammonia
Nitrogen dioxide
Nitric acid

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Chemistry
Which of the following is used to increase the anti-knocking property of petrol ?

Trimethyl lead
Triethyl lead
Tetramethyl lead
Tetraethyl lead

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Chemistry
Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful

CO2 in the air
Solar infrared radiation
Solar ultraviolet radiation
SO2 in the air

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Chemistry
An acid having basicity one is

Phosphoric acid
Sodium phosphate
Sodium dihydrogen phosphate
Disodium hydrogen phosphate

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Chemistry
White lung cancer' is caused by

Silica
Asbestos
Textiles
Paper

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