At a given temperature, total vapour pressure in torr of a mixture of volatile compounds A and B given by = 120 – 75 . Hence sum of the vapour pressures of pure A and pure B is
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Answer:
P
Total
=120−75X
B
=P
A
o
X
A
+P
B
o
X
B
But X
A
=1−X
B
Hence, P
Total
=120−75X
B
=P
A
o
(1−X
B
)+P
B
o
X
B
=P
A
o
−(P
A
o
−P
B
o
)X
B
Hence, P
A
o
=120 and P
B
o
=120−75=45
Hence, the correct option is C
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temperature total vapour pressure in the toll means that tourism pressure of an vapour turn off the mixture of environment components A and B given by the P total is equal to 120 - 75 into B
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