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Chemistry

Chemistry
The percentage of oxygen in air is approximately

0.21
1
0.01
0.78

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Chemistry
The name of unreactive gas is

Hydrogen
Carbon dioxide
Oxygen
Nitrogen

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Chemistry
Colloids can be purified by

Condensation
Condensation
Dialysis
Condensation

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Chemistry
Number of hydrogen atoms in a Glucose molecule

12
6
14
8

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Chemistry
Iron filings can be separated from a heterogenous mixture using the technique of :

Magnetization
Evaporation
Sublimation
Sedimentation

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Chemistry
The most abundant constituent of atmospheric air is :

Hydrogen
Oxygen
Carbon
Nitrogen

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MORE MCQ ON Chemistry

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