The percentage ratio of the partial pressure of the vapor to the vapor pressure of the liquid at the existing temperature is_____________________?

Related Mcqs:

1. The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the_____________________?

   A. Relative humidity
   B. Relative saturation
   C. Percentage saturation
   D. None of these

2. A vapor whose partial pressure is less than its equilibrium vapor pressure is called a ______________ vapor?

   A. Saturated
   B. Supersaturated
   C. Superheated
   D. None of these

3. A vapor whose partial pressure is less than its equilibrium vapor pressure is called the _____________ vapor?

   A. Saturated
   B. Superheated
   C. Unsaturated
   D. Dry gaseous

4. Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant ‘K’ is____________________?

   A. 10 atm-1
   B. 105 atm-1
   C. 10 (dimensionless)
   D. 105 (dimensionless)

5. If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its___________________?

   A. Bubble point
   B. Saturation temperature
   C. Dew point
   D. Both B. and C.

6. “The equilibrium value of the mole fraction of the gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid surface”. This statement pertaining to the solubility of gases in liquid is the ______________ law?

   A. Raoult’s
   B. Henry’s
   C. Amagat’s
   D. None of these

7. Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are pv B and pv w respectively. The partial pressure of benzene in air-vapour mixture is_________________?

   A. PvB
   B. xB.PvB
   C. (Patm – Pvw)xB
   D. xB.Patm

8. In a mixture of benzene vapor and nitrogen gas at a total pressure of 900 mm Hg, if the absolute humidity of benzene is 0.2 kg benzene/kg nitrogen, the partial pressure of benzene in mm Hg is__________________?

   A. 180
   B. 60.3
   C. 720
   D. 200

9. The partial pressure of each constituent present in an alloy is _____________ the total vapor pressure exerted by the alloy?

   A. Less than
   B. Equal to
   C. More than
   D. Either B. or C; depends on the type of alloy

10. The vapour pressure of water is given by, in Psat = A – (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K. The vapor pressure of water in atm. at 50°C is approximately__________________?

    A. 0.07
    B. 0.09
    C. 0.11
    D. 0.13