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Chemistry

Chemistry
Which of the following is chiefly present in LPG (Liquefied Petroleum Gas) ?

Propane
Butane
Methane
Ethane

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Chemistry
The most abundant element by number in the living system is :

Hydrogen
Carbon
Nitrogen
Oxygen

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Chemistry
If water smells bad, then that odour can be removed by adding

Activated carbon
Alum
Deactivated nitrogen
Bleach

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Chemistry
Acid rain is caused by

CO2and CFCs
SO2 and NO2
SO2 and particulates
NO2and particulates

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Chemistry
In sugar solution,

Sugar is solvent, water is solute
Sugar is solute, water is solvent
Both are solvents
Both are solutes

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Chemistry
In deep-sea diving, divers use a mixture of gases consisting of oxygen and

Argon
Nitrogen
Hydrogen
Helium

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