Vapour Pressure
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Q. The vapour pressure of a dilute aqueous solution of glucose is 750 mm Hg at 373 K. Calculate:
(i) Molality
(ii) Mole fraction of the solute
(i) Molality
(ii) Mole fraction of the solute
- (i) 0.013 m, (ii) 0.74
- (i) 0.74 m, (ii) 0.0132
- (i) 0.74 m, (ii) 0.98
- (i) 0.013 m, (ii) 0.26
Q. Choose the correct statement regarding vapour pressure:
Q. Which among the following aqueous solution has highest boiling point?
निम्नलिखित में से किस जलीय विलयन का क्वथनांक उच्चतम है?
निम्नलिखित में से किस जलीय विलयन का क्वथनांक उच्चतम है?
- 0.1 m NaCl
- 0.01 m NaCl
- 0.01 m Na2SO4
- 0.1 m Na2SO4
Q. The vapour pressure of a dilute aqueous solution of glucose is 750 mm Hg at 373 K. Calculate:
(i) Molality
(ii) Mole fraction of the solute
(i) Molality
(ii) Mole fraction of the solute
- (i) 0.013 m, (ii) 0.74
- (i) 0.74 m, (ii) 0.0132
- (i) 0.74 m, (ii) 0.98
- (i) 0.013 m, (ii) 0.26
Q. At 80∘ C, the vapour pressure of a pure liquid A is 520 mm Hg and that of a pure liquid of B is 1000 mm Hg. If the ideal mixture of liquids A and B boils at 80∘ C and 1 atm pressure, the amount of solution A in the mixture is: (1 atm = 760 mm Hg)
- 50 mol %
- 52 mol %
- 34 mol %
- 48 mol %
Q. The equilibrium vapour pressure of water vapour over a 0.20 mole sample of liquid water is 35 torr at 27∘ C. If the amount of the liquid water is decreased to 0.10 mole, the equilibrium vapour pressure of it would be
- 17.5 torr
- 35.0 torr
- 51.5 torr
- None of these