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Chemistry

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

Hydrogen
Nitrogen
Helium
Methane

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Chemistry
The unit of ionic product of water (Kw) is :

Mol2 let-1
Mol2 let-2
Mol-1 let-2
Mol-1 let-1

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Chemistry
The percentage of oxygen in air is approximately

0.01
0.21
0.78
1

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Chemistry
The most abundant element in the earth’s atmosphere is

Oxygen
Nitrogen
Argon
Krypton

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Chemistry
The ‘Green House effect’ is produced due to the presence of excess amount of

Sulphur dioxide
Methane
Carbon monoxide
Nitrogen dioxide

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Chemistry
In organic compounds, nitrogen is estimated by

Victor-Meyer's method
Dumas method
Carius method
Liebig's method

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MORE MCQ ON Chemistry

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