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Chemistry

Chemistry
Water can be separated from alcohol water mixture by

Sublimation
Decantation
Evaporation
Distillation

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Chemistry
Poison used for killing rats is

Calcium phosphide (Ca3P2)
Zinc phosphide (Zn3P2)
Magnesium phosphide (Mg3P2)
Magnesium nitride (Mg3N2)

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Chemistry
Maximum permissible concentration of copper in drinking water in mg/L is

0.05
0.01
2
1

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Chemistry
Which one of the following chemicals helps in fruit ripening?

Malathion
Ethephon
Atrazine
Isoproturan

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Chemistry
Hydrogen is not found in atmosphere because

It immediately combines with oxygen to form water
It is highly inflammable
It is absorbed by plants
It is the lightest gas

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Chemistry
Galvanization is the :

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

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