Tardigrade
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Tardigrade
Question
Chemistry
In water saturated air the mole fraction of water vapour is 0.02. If the total pressure of the saturated air is 1.2 atm, the partial pressure of dry air is :
Q. In water saturated air the mole fraction of water vapour is
0.02
. If the total pressure of the saturated air is
1.2
a
t
m
, the partial pressure of dry air is :
42244
155
NEET
NEET 2019
Solutions
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A
1.18 atm
16%
B
1.76 atm
20%
C
1.176 atm
47%
D
0.98 atm
16%
Solution:
X
H
2
O
=
0.02
∴
X
g
a
s
=
0.98
P
t
o
t
a
l
=
1.2
a
t
m
partial pressure of dry-air
=
P
T
×
mole fraction of dry-air
Partial pressure of dry-air
=
1.2
a
t
m
×
0.98
=
1.176
a
t
m
.