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Chemistry

Chemistry
'Fire-fighting clothes' are made from

Asbestos
Talc
Mica
Steatite

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Chemistry
Sea water is saltier than rain water because

Sea beds have salt producing mines
The air around the sea is saltish
Rivers wash away salts from earth and pour them into the sea
Sea animals are salt producing

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Chemistry
In upper layer of atmosphere ozone is formed by

The combination of oxygen molecules
The action of ultraviolet rays on oxygen
Subjecting oxygen to high pressure
The action of nitrogen on oxygen in atmosphere

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Chemistry
What is the maximum Water Vapour content in the atmosphere?

4 to 5 per cent
5 to 6 per cent
2 to 3 per cent
3 to 4 per cent

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Chemistry
Which one of the following has greatest mass ?

Electron
Hydrogen nucleus
Proton
Neutron

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Chemistry
The most commonly used bleaching agent is

alcohol
carbon dioxide
chlorine
sodium chlorine

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MORE MCQ ON Chemistry

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