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Chemistry
If P0 and PS are the vapour pressure of solvent and solution, respectively and N1 and N2 are the moles of solute and solvent then
Q. If
P
0
and
P
S
are the vapour pressure of solvent and solution, respectively and
N
1
and
N
2
are the moles of solute and solvent then
4182
209
Solutions
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A
P
0
P
0
−
P
S
=
N
1
+
N
2
N
1
47%
B
P
S
P
0
−
P
S
=
N
2
N
1
12%
C
P
S
=
P
0
⋅
N
1
+
N
2
N
2
6%
D
All of these.
36%
Solution:
According to Raoult's law,
P
0
P
0
−
P
S
=
N
1
+
N
2
N
1
;
∴
1
−
P
0
P
S
=
N
1
+
N
2
N
1
or
P
0
P
S
=
1
−
N
1
+
N
2
N
1
=
N
1
+
N
2
N
2
or
P
S
=
P
0
×
N
1
+
N
2
N
2
Again,
P
0
P
0
−
P
S
=
N
1
+
N
2
N
1
∴
P
0
−
P
S
P
0
=
N
1
N
1
+
N
2
=
1
+
N
1
N
2
or
P
0
−
P
S
P
S
=
N
1
N
2
or
P
S
P
0
−
P
S
=
N
2
N
1