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Chemistry

Chemistry
Which of the following gases is most toxic ?

Chlorine
Sulphur dioxide
Carbon dioxide
Carbon monoxide

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Chemistry
The mass of one Avogadro number of helium atom is

4 x 6.02 x 1023 gram
1.00 gram
4.00 gram
8.00 gram

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Chemistry
The buffer action of blood is due to the presence of

HCI and NaCI
CI– and [HCO3]–
CI– and [CO3]2–
[HCO3]– and H2CO3

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Chemistry
The chief source for the production of nitrogeneous fertilizers is :

Nitrogen
Nitric acid
Nitrogen dioxide
Ammonia

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Chemistry
Ozone depletion in the atmosphere is mainly caused by

Hydrogen sulphide
Nitrogen dioxide
Sulphur dioxide
Chlorofluorocarbon

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Chemistry
Neoprene is a polymer of

Chloroprene
Isopentane
Isobutane
Isoprene

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MORE MCQ ON Chemistry

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