For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause ____________________ plate requirement?

Related Mcqs:

1. For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause ______________ plate requirement?

   A. No change in theoretical
   B. Marginal decrease in the number of
   C. Major decrease in the number of
   D. None of these

2. For water-ethanol system, the minimum reflux ratio_____________________?

   A. Is computed from the slope of the upper operating line that is tangent to the equilibrium curve
   B. Is computed from the intercept of the operating line
   C. Cannot be computed
   D. Is the optimum reflux ratio

3. The efficiency of a plate column will be maximum, when the flow is ideal __________________ the plate?

   A. Across
   B. Above
   C. Both A. & B.
   D. Neither A. nor B.

4. In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be___________________?

   A. At ground level
   B. 2 metres above the ground
   C. 5 metres above ground
   D. 10 metres above ground

5. In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be_____________________?

   A. At ground level
   B. 2 metres above the ground
   C. 5 metres above ground
   D. 10 metres above ground

6. A distillation column separates 10000 kg/hr of a benzene-toluene mixture as shown in the figure below: In the figure xF, xD and xW represent the weight fraction of benzene in the feed, distillate and residue respectively. The reflux ratio is_______________ ?

   A. 0.5
   B. 0.6
   C. 1.0
   D. 2.0

7. The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by __________________?

   A. Raising the temperature
   B. Lowering the total pressure
   C. Both A. and B.
   D. Neither A. nor B.

8. In case of steam distillation, the steam leaving the liquid is not completely saturated with distillate vapour, because_______________?

   A. Temperature is less
   B. Total pressure is less
   C. Mixing of steam with the material being vaporised is not so intimate as to result in equilibrium
   condition
   D. Saturated steam is used for steam distillation

9. With the lowering of equilibrium pressure, at a given temperature, the amount of adsorbate on the adsorbent ?

   A. Increases
   B. Decreases
   C. Remain same
   D. Either A. or B., depends on the system

10. With the lowering of equilibrium pressure, at a given temperature, the amount of adsorbate on the adsorbent______________________?

    A. Increases
    B. Decreases
    C. Remain same
    D. Either A. or B., depends on the system