Related Mcqs:

1. The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. The temperature at which the above mixture will exert a pressure of one standard atm. is___________________?

   A. Less than 100°C
   B. 100°C
   C. Between 100 and 110°C
   D. 110.6°C

2. The value of Trouton’s ratio (λb/Tb) for a number of substances is 21 (where, λb = molal that of vaporisation of a substance at its normal boiling point, KCal/kg. mole and Tb = normal boiling point, °K). The Kistyakowsky equation is used for calculation of Trouton’s ratio of _____________ liquids?

   A. Polar
   B. Non-polar
   C. Both A. & B.
   D. Neither A. nor B.

3. Assume that benzene is insoluble in water. The normal boiling points of benzene and water are 80.1 and 100°C respectively. At a pressure of 1 atm, the boiling point of a mixture of benzene and water is__________________?

   A. 80.1°C
   B. Less than 80.1°C
   C. 100°C
   D. Greater than 80.1°C but less than 100°C

4. A gas mixture contains 6 moles of H2 and 2 moles of N2. If the total pressure of the gaseous mixture is 4 kgf/cm2; then the partial pressure of N2 in the mixture will be _____________ kgf/cm2 ?

   A. 1
   B. 2
   C. 4
   D. 8

5. An Azeotropic solution of two liquids has boiling point lower than either of them, when it_____________?

   A. Is saturated
   B. Is unsaturated
   C. Shows negative deviation from Raoult’s law
   D. Shows positive deviation from Raoult’s law

6. The molecules of a liquid which is in equilibrium with its vapor at its boiling point on an average have equal _____________ in the two phases?

   A. Potential energy
   B. Intermolecular forces
   C. Kinetic energy
   D. Total energy

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. A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal______________?

   A. Kinetic energy
   B. Intermolecular forces of attraction
   C. Potential energy
   D. Total energy

9. In case of a solution (not of a solid in a liquid), whose total volume is less than the sum of the volumes of its components in their pure states, solubility is__________________?

   A. Independent of temperature
   B. Increases with rise in pressure
   C. Increased with decrease in pressure
   D. Unchanged with pressure changes

10. In case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubility is__________________?

    A. Independent of the temperature
    B. Increased with the increase in pressure
    C. Decreased with the increase in pressure
    D. Unchanged by the pressure change