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Chemistry

Chemistry
The gas used in the manufacture of vanaspati from vegetable oil is

oxygen
hydrogen
carbon dioxide
nitrogen

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Chemistry
The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?

1/3
1/8
1/6
1/4

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Chemistry
The absolute temperature of a gas is doubled and the pressure is reduced to half, the volume of the gas

Will increase four-fold
Will be doubled
Remains unchanged
Will be reduced to half

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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/36
5x
7.2 x

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Chemistry
What is a Bakelite ?

Base
Polymer
Solution
Acid

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Chemistry
Which one of the following gases has the highest calorific value?

Water gas
Natural gas
Indane gas
Coal gas

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