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Mole Fraction

49. If two su...

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49. If two substances A and B have Pa:Pb=1:2 and have mole fraction in solution as 1:2 then mole fraction of A in vapours is A)0.33 B)0.25 C)0.52 D)0.2

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Q. If two substances A and B have

P_{A}^{0} : P_{B}^{0} = 1 : 2

and have mole ratio in solution 1:2, then mole fraction of A in vapours is:

A

B

{P^{\circ}}_{A} : {P^{\circ}}_{B} = 1 : 3

at a certain temperature. If the mole fraction ratio of

x_{A} : x_{B} = 1 : 3

, the mole fraction of

A

in vapour in equilibrium with the solution at a given temperature is

Q. Mole fraction of

A

vapours above solution in mixture of

A

B

X_{A} = 0.4

P_{A}^{\circ} = 100 m m, P_{B}^{\circ} = 200 m m

]

A

B

have vapour pressure in the ratio

P_{A}^{\circ} : P_{B}^{\circ} = 1 : 3

at a certain temperature. Assume

A

B

form an ideal solution and the ratio of mole fractions of

A

B

in the vapour phase is

4 : 3

. Then the mole fraction of

B

in the solution at the same temperature is:

Q. Two liquids 'A' and 'B' have vapour pressure (in pure state) in the ratio

p_{A}^{\circ} : p_{B}^{\circ} = 1 : 3

at a certain temperature. Assume 'A' and 'B' form an ideal solution and the ratio of mole fractions of 'A' to 'B' in the vapour phase is 4 : 3. The the mole fraction of 'B' in the solution at the same temperature is:

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