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Chemistry

Chemistry
The third shell of an atom can have a maximum of ______ electrons

18
15
21
13

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Chemistry
Which of the following is the main nitrogenous waste in humans ?

Urea
Uric Acid
Ammonium Nitrate
Ammonia

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Chemistry
The first organic compound synthesised in the laboratory was

Lactic acid
Glucose
Urea
Uric acid

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Chemistry
Dry ice is the solid form of :

Water
Carbon di–oxide
Air
Nitrogen

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Chemistry
Select the one which is not a mixture :

Distilled water
Air
Gasoline
LPG

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Chemistry
Which one of the following group of gases contributes to the 'Green House Effect'?

Carbon monoxide and Sulphur dioxide
Carbon dioxide and Methane
Carbon tetraflouride and Nitrous oxide
Ammonia and Ozone

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