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Chemistry

Chemistry
A pungent smell often present near the urinals is due to

Sulphur-di- oxide
Urea
Ammonia
Chlorine

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Chemistry
The gas which is mainly responsible for the green house effect is:

Carbon dioxide
Carbon monoxide
Ozone
Oxygen

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Chemistry
Muddy water is treated with alum in purification process, itis termed as :

Coagulation
Emulsification
Adsorption
Absorption

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Chemistry
Cloud is a colloidal dispersion of

Water drops in a dispersion medium of air
Mist in a dispersion medium of air
Fog in a dispersion medium of water
Air in a dispersion medium of water

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Chemistry
Sour taste of lemon is due to the presence of which of the following ?

Oxalic acid
Acetic acid
Formic acid
Citric acid

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

Hydrocarbons
CO
CO2
NO

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