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Standard XII
Chemistry
Abundance and Isotopes
gas is lighte...
Question
______ gas is lighter than air.
A
Oxygen
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B
Carbon dioxide
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C
Hydrogen
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D
None of these
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Solution
The correct option is
C
Hydrogen
Hydrogen is lighter as the mass of
H
2
gas is
2
a
m
u
whereas air contains a mixture of gases in different proportions.
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