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In a solution (A and B); The vapour pressure of A is 260 mmHg and B is 360 mmHg; Find the relative volatility?
A
0.72
B
1.38
C
2
D
None of the mentioned
Correct Answer:
0.72
Relative volatility= vapour pressure of A/ Vapour pressure of B = 260/360 =0.72.
Consider an ideal vapour-liquid binary mixture, find the total pressure if the vapour pressure of A is 260 mmHg and the vapour pressure of B is 520 mmHg and the composition of A in mole fraction is 0.55.
A
177 mmHg
B
277 mmHg
C
377 mmHg
D
477 mmHg
Check whether we get approximately 80% saturation if the total pressure and the partial pressure of the gas mixture is 760 mmHg and 260 mmHg. Also, the vapour pressure is 300 mmHg.
A
True
B
False
Consider the following statements and choose the correct answer:
1. A direct proportionality exists between vapour pressure and the concentration of water vapour in the atmosphere
2. Relative humidity is an expression of the ratio of the actual vapour pressure of the atmosphere when saturated at the same temperature
3. A rise or fall in temperature with no change in vapour pressure will cause a drop or rise, respectively, in relative humidity
4. A rise or fall in vapour pressure with no change in temperature will be accompanied by a rise or fall, respectively, in relative humidity
A
1, 2, 3 and 4 are true
B
Only 3 and 4 are true
C
Only 2 and 4 are true
D
Only 1, 2 and 3 are true
Guess the saturated molar absolute humidity of the gas(A.- Vapour(B. mixture at 100 degree Celsius. Vapour pressure of A is 300 mmHg and the total pressure is 760 mmHg.
A
0.39
B
0.65
C
0.60
D
Cannot determine
Find the vapour pressure of component A in an ideal mixture, if its liquid composition and the partial pressure is 0.65 and 260 mmHg.
A
260 mmHg
B
400 mmHg
C
760 mmHg
D
Cannot determine
Consider an insoluble mixture A and B; Find the Total pressure of the system Vapour pressure of A= 50mmHg Vapour pressure of B= 100 mmHg
A
50 mmHg
B
100 mmHg
C
150 mmHg
D
200 mmHg
Consider a saturated gas(A.-vapour(B. mixture , if the absolute molal humidity is 0.265 and the total pressure= 760 mmHg. Find the vapour pressure of B.
A
149.21 mmHg
B
159.21 mmHg
C
169.21 mmHg
D
600.8 mmHg
Assume an ideal solution with pure component A, has a vapour pressure of 300 mmHg and the total pressure of 1atm. The concentration in terms of mole ratio is
A
0.65
B
0.28
C
0.39
D
None of the mentioned
Relative volatility varies with the concentration of component for an ideal solution. The relative volatity of a binary mixture may be defined as the ratio of vapor pressure of component 'A' to that of component 'B', when
A
Only vapor phase follows Raoult's law
B
Only liquid phase obeys Dalton's law
C
Liquid phase obeys Dalton's law and vapor phase obeys Raoult's law
D
Vapor phase obeys Dalton's law and liquid phase obeys Raoult's law
For an ideal solution the partial vapour pressure of a component in solution is equal to the mole fraction of that component times its vapour pressure. Is the
A
Henry`s Law
B
Dalton`s Law
C
Charles Law
D
Raoult`s LAw