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Chemistry

Chemistry
Which among the following elements is found in maximum percentage in the human body ?

Oxyzen
Hydrogen
Nitrozen
Carbon

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Chemistry
The structure of (HPO3)3 is

Cyclic
Linear
Tetrahedral
Octahedral

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Chemistry
The first metal used by a man was

Brass
Silver
Bronze
Copper

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

Isoproturan
Ethephon
Atrazine
Malathion

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Chemistry
In upper layer of atmosphere ozone is formed by

The action of nitrogen on oxygen in atmosphere
The action of ultraviolet rays on oxygen
Subjecting oxygen to high pressure
The combination of oxygen molecules

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

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