Under conditions of equal reduced pressure and equal reduced temperature, substances are said to be in the ‘corresponding states’. At equal reduced conditions i.e., at the corresponding state, the ____________ of different gases are nearly the same?

Related Mcqs:

1. One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m3. It cools to 98°C; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m3. The latent heat of condensation (kJ/kg-1 ) under these conditions is___________________?

   A. 40732
   B. 2676
   C. 2263
   D. 540

2. Gases having same reduced temperatures and reduced pressures_________________?

   A. Deviate from ideal gas behaviour to the same degree
   B. Have nearly the same compressibility factor
   C. Both A. and B.
   D. Neither A. nor B.

3. At higher temperature, molal heat capacities of most of the gases (at constant pressure) ____________ with increase in temperature?

   A. Increases
   B. Decreases
   C. Remains unchanged
   D. Increases linearly

4. 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.

5. 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

6. For most salts, the solubility increases with rise in temperature, but the solubility of _______________ is nearly independent of temperature rise?

   A. Sodium chloride
   B. Sodium carbonate monohydrate
   C. Anhydrous sodium sulphate
   D. Hypo

7. Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m3. The diffusivity of aniline in air is 0.74 × 10-5m2/s. The numerical value of mass transfer co-efficient is 7.4 × 10-3. Its units are_______________________?

   A. m/s
   B. cm/s
   C. mole/m2.s.Pa
   D. k.mole/m2.s.Pa

8. 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

9. For water evaporating into unsaturated air under adiabatic conditions and at constant pressure, the ____________ remains constant throughout the period of vaporisation ?

   A. Dry bulb temperature
   B. Wet bulb temperature
   C. Humidity
   D. Relative saturation

10. If the absolute temperature of an ideal gas is tripled and simultaneously the pressure is reduced to one third; then the volume of gas will _______________?

    A. Remain unaltered
    B. Increase nine fold
    C. Increase three fold
    D. Decrease three fold