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Chemistry

Chemistry
Which of the following is a secondary pollutant ?

PAN
SO2
CO
NO

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Chemistry
The process of removing calcium and magnesium from hard water is known as

Water softening
Flocculation
Filtration
Sedimentation

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Chemistry
The mass of one Avogadro number of helium atom is

4 x 6.02 x 1023 gram
4.00 gram
1.00 gram
8.00 gram

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Chemistry
Which of the following is not a chemical reaction'?

Burning of coal
Conversion of water into steam
Digestion of food
Burning of paper

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Chemistry
If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by

Lead
Iron
Arsenic
Mercury

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Chemistry
The percentage of Nitrogen in Air is

0.03
85.02
78.03
0.94

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MORE MCQ ON Chemistry

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