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Chemistry

Chemistry
The lowest layer of earth's atmosphere is

Troposphere
Mesosphere
Stratosphere
Ionosphere

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Chemistry
Soap helps in better cleaning of clothes because

It gives strength to solution
It reduces the surface tension of solution
It absorbs the dirt
Soap acts like catalyst

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Chemistry
The orientation of an atomic orbital is governed by

Spin quantum number
Magnetic quantum number
Principal quantum number
Azimuthal quantum number

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Chemistry
The chemical bahaviour of an atom depends upon

The number of neutrons in the nucleus
The number of electrons orbiting around the nucleus
The number of protons in its nucleus
The number of nucleons in the nucleus

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Chemistry
The pH of human blood is between :

7.5-8
4.5-5
44052
6.5-7

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Chemistry
Which of the following is used in welding broken pieces of iron rails and machine parts?

Aluminium sulphate
Aluminium powder
None of these
Solder

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MORE MCQ ON Chemistry

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