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Chemistry

Chemistry
Tear gas is :

Chloroprene
Carbonyl chloride
Bleaching powder
Nitrous oxide

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Chemistry
Brass is a solution of molten copper in

Solid zinc
Molten zinc
Molten tin
Gaseous zinc

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Chemistry
Glycol is used to manufacture which of the following ?

Rubber
Nylon
Artificial silk
Terylene

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Chemistry
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called

leaching
levigation
magnetic separation
liquation

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Chemistry
Which one of the following is not a fertilizer?

Ammonium sulphate
Calcium sulphate
Potassium nitrate
Calcium ammonium nitrate

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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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