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Chemistry

Chemistry
Which one of the following has greatest mass ?

Hydrogen nucleus
Electron
Neutron
Proton

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Chemistry
Which one of the following contains maximum percentage of carbon ?

Wrought iron
High speed steel
Cast iron
Stainless steel

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Chemistry
The gas which turns into liquid at the lowest temperature among the following is

Oxygen
Nitrogen
Helium
Hydrogen

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Chemistry
The gas used to dilute oxygen for breathing by deep sea divers is:

Neon
Helium
Argon
Nitrogen

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Chemistry
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is

x/6
5x
5x/36
7.2 x

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Chemistry
By which organic compound all the oils are known ?

Protein
Ester
Hydrocarbon
Carbohydrate

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MORE MCQ ON Chemistry

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