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Chemistry

Chemistry
Charcoal is used in water treatment as a/an

Absorbent
Coagulant
Solvent
Adsorbent

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Chemistry
Submarines move under water. They have engines that run on

Diesel
Petrol and oxygen
Batteries
Steam

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Chemistry
What is the element that is in the highest percentage in the composition of the earth ?

Iron
Silicon
Oxygen
Magnesium

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Chemistry
Glycol is added to aviation gasoline because it

Increases efficiency of petrol
Prevents freezing of petrol
Reduces consumption of petrol
Reduces evaporation of petrol

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Chemistry
Formation of ozone hole is maximum over

India
Africa
Europe
Antarctica

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Chemistry
Galvanization is the :

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

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