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Gaseous State: Ideal Gases
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Dalton's law and mixtures of gases
JEE Advanced level
Single correct option
Difficulty 3 of 3
ig091
A mixture of
CO
and
CO
X
2
has an average molar mass of
36
g
mo
l
−
1
. The mole fraction of
CO
X
2
in the mixture is
A
0.50
B
0.25
C
0.75
D
0.60
Answer: A
M
ˉ
=
28
(
1
−
x
)
+
44
x
=
36
, so
16
x
=
8
and
x
CO
X
2
=
0.50
.
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