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Chemistry

Chemistry
The main active constituent of tea and coffee is

chlorophyll
aspirin
nicotine
caffeine

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Chemistry
The gas dissolved in water that makes it basic is :

Carbon dioxide
Sulphur dioxide
Hydrogen
Ammonia

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Chemistry
Which metal is extracted from sea water?

Magnesium
Aluminium
Potassium
Beryllium

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Chemistry
Which of the following elements is found in all organic compounds

Carbon
Calcium
Nitrogen
Oxygen

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Chemistry
The highest volume of gases in lower atmosphere is comprised of

Nitrogen
Carbon dioxide
Hydrogen
Oxygen

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Chemistry
During fermentation of sugar, the compound which is always formed is :

Ethyl Alcohol
Ethylene
Acetic Acid
Methyl Alcohol

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