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Chemistry

Chemistry
The hottest part of the gas flame is known as

blue zone
dark zone
luminous zone
non-luminous zone

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Chemistry
Earth’s atmosphere is an envelope of gases extending to a height of

150 km
200 km
300 km
100 km

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Chemistry
Which of the following gases is mixed with oxygen for breathing by divers in aqua lungs?

Methane
Helium
Nitrogen
Hydrogen

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Chemistry
The depletion of Ozone layer is mainly due to

Radioactive rays
Chlorofluorocarbons
Volcanic eruptions
Aviation fuels

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Chemistry
Pollutant from motor car exhaust that causes mental disease is

SO2
Lead
NO2
Hg

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Chemistry
By which organic compound all the oils are known ?

Protein
Hydrocarbon
Ester
Carbohydrate

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MORE MCQ ON Chemistry

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