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Chemistry

Chemistry
Atomic number is the number equal to

Protons
Neutrons
None of these
Electrons

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Chemistry
Forth floatation process to concentrate the minerals is applicable to

Chalcopyrites
Haematite
Calamine
Bauxite

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Chemistry
Which type of fire extinguisher is used for petroleum fire ?

None of these
Powder type
Soda acid type
Foam type

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Chemistry
Taj Mahal is greatly affected due to :

Sound pollution
Acid rain
Tourists
Deforestation

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Chemistry
Which one of the following elements is least likely to be found in commercial fertilisers?

Potassium
Phosphorous
Silicon
Nitrogen

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Chemistry
Galvanization is the :

Deposition of aluminium on iron
Deposition of tin on iron
Deposition of copper on iron
Deposition of zinc on iron

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