For the flow of gases through a capillary, with increase in temperature, the permeability __________________ as per Knudsen law?

Related Mcqs:

1. If the solubilities of different components (in a liquid-liquid extraction system) increase with rise in temperature, then the temperature above which they dissolve completely is known as the critical solution temperature (CST or consolute temperature). If solubilities increase with decrease in temperature, then CST is the temperature below which they dissolve completely. If a binary system has no critical solution temperature, it implies that___________________?

   A. The system comprises of partially miscible liquids
   B. The system comprises of miscible liquids
   C. The system comprises of an azeotrope
   D. On heating, a vapor phase will appear; while on cooling, a solid phase will appear

2. According to Poiseuille’s law, the permeability for gas flow through a capillary is proportional to (where, μ = gas viscosity)___________________?

   A. μ
   B. 1/μ
   C. √μ
   D. μ2

3. The Knudsen diffusivity is proportional to (where, T = absolute temperature) ______________________?

   A. √T
   B. T2
   C. T
   D. T4

4. The Knudsen diffusivity is dependent on the ______________________?

   A. Molecular velocity only
   B. Pore radius of the catalyst only
   C. Molecular mean free path only
   D. Molecular velocity and pore radius of the catalyst

5. With increase in temperature, the solubility of gases in liquids, at fixed pressure____________________?

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

6. To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate) ____________________?

   A. Increase both ‘G’ and ‘S’
   B. Decrease both ‘G’ and ‘S’
   C. Increase ‘S’ and decrease ‘G’
   D. Increase ‘G’ and decrease ‘S’

7. At a given equilibrium pressure, with increase in temperature, the concentration of adsorbed gas on solid adsorbent __________________?

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

8. With increase in the liquid flow rate at a fixed gas velocity in a randomly packed counter current gas-liquid absorption column, the gas pressure drop___________________?

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

9. 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.

10. The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line) ?

    A. L/mG
    B. G/mL
    C. mL/G
    D. LG/m