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Chemistry

Chemistry
Which type of radiations are absorbed by the upper layer of the atmosphere?

Infrared
Visible
Radio-waves
Ultraviolet

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Chemistry
The number of electrons presents in H+ is

two
zero
three
one

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Chemistry
The third shell of an atom can have a maximum of ______ electrons

15
21
13
18

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

Oxygen
Sulphurdioxide
Nitrogen
Carbondioxide

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Chemistry
The increasing abundance of green house gases in atmosphere has led to the following effect except

Oxygen fertilization effect
Carbon dioxide ferilization effect
Depletion of ozone layer in the stratosphere
Global warming

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

Adsorption
Coagulation
Absorption
Emulsification

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