Related Mcqs:

1. Relative volatility varies with the concentration of component for an ideal solution. The relative volatility 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

2. In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at ________________ reflux ?

   A. Total
   B. Minimum
   C. Operating
   D. Maximum permissible

3. Calculation of mass transfer co-efficient is mostly/normally done using ______________ theory?

   A. Surface renewal
   B. Film
   C. Penetration
   D. None of these

4. Polar organic compounds are normally used as separating agents for the azeotropic and extractive distillation. Which of the following is the most important factor to be considered for the choice of the separating agent for extractive distillation ?

   A. Cost
   B. Availability
   C. Toxicity
   D. Selectivity

5. With lapse of time, the overhead composition of light component in case of batch distillation with constant reflux__________________?

   A. Increases
   B. Decreases
   C. Remain same
   D. May increase or decrease; depends on system

6. Cox chart, which is useful in the design of distillation column particularly for petroleum hydrocarbons, is a plot of (where, P = vapor pressure, T = temperature) ?

   A. log P vs. T
   B. log P vs. log T
   C. T vs. P
   D. P vs. log T

7. With decrease in the throughput (compared with the design capacity) for a bubble cap distillation column, its efficiency____________________?

   A. Increases
   B. Decreases
   C. Remain same
   D. May increase or decrease; depends on individual design

8. Deaeration (removal of O2) of water is done by_________________?

   A. Rectification
   B. Absorption
   C. Ion-exchange
   D. Adsorption

9. The diffusivity, DAB (for component A diffusing in B) is equal to the diffusivity DBA (for component B diffusing in A) for a binary mixture of________________?

   A. Newtonian liquids
   B. Non-Newtonian liquids
   C. Ideal gases
   D. Real gases

10. The ‘shanks system’ of leaching (i.e., counter-current multiple contact leaching) is used for____________________?

    A. Recovery of tannis from the tree barks and woods
    B. Leaching sodium nitrate from Chilean nitrate bearing rock
    C. Both A. and B.
    D. Neither A. nor B.