Under identical conditions of pressure
and temperature, 4 L of gaseous mixture
(H, and CH4) effuses through a hole
in 5 min whereas 4 L of a gas X of
molecular mass 36 takes to 10 min to
effuse through the same hole. The mole
ratio of H2 : CH4 in the mixture is :
А
1 : 2
B
2 : 1
C
2 : 3
D
1 : 1
Answers
Answered by
0
Answer:
ANSWER
Rate of diffusion is directly proportional to
(
MOLECULAR WEIGHT)
1
TIME∝
MOLECULAR WEIGHT
Now time is taken for mixture=5 min
time is taken for unknown gas =10 min
therefore
m
1
/5
=
10
36
m
1
=3
m
1
=9
MOLECULAR WEIGHT m
1
=
n
1
+n
2
n
1
M
1
+n
2
M
2
where n
1
and n
2
are number of moles of H
2
and CH
4
respectively
9=
(n
1
+n
2
)
n
1
×2+n
2
×16
9n
1
+9n
2
=2n
1
+16n
2
7n
1
=7n
2
n
1
=n
2
Therefore moles ratio is 1:1
Hence, the correct option is D
Explanation:
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