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Standard XII
Chemistry
Mole Concept
5.6 litres of...
Question
5.6 litres of a gas weighs
1
g
at STP. The gas can be:
A
H
2
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B
N
2
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C
H
e
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D
O
2
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Solution
The correct option is
C
H
e
Number of moles of gas
5.6
22.4
=
1
4
Number of moles
=
Weight
Molecular weight
=
1
4
=
1
Molecular weight
⇒
Molecular weight
=
4
Molecular weight 4 is possible only for He out of the given options. Hence, the answer is (c)
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