The Sum of the molefractions of soluteand solventis equalto:
(a)5
(b) 2
(c)1
(d)0
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Answer:
Let mole fractions of A, B in a binary solution be X
A
and X
B
respectively.
X
A
=
n
A
+n
B
n
A
X
B
=
n
A
+n
B
n
B
∴X
A
+X
B
=
n
A
+n
B
n
A
+n
B
=1
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