# Mass Transfer

• ## Fenske’s equation for determining the minimum number of theoretical stages in distillation column holds good, when the_____.

• A. Relative volatility is reasonably constant
• B. Mixture (to be separated) shows negative deviation from ideality
• C. Mixture (to be separated) shows positive deviation from ideality
• D. Multicomponent distillation is involved
Explanation:

No answer description available for this question

• ## Pick out the wrong statement:

• A. Change in barometric pressure does not affect the relative humidity
• B. In case of a packed tower, the operating velocity is about half of the flooding velocity, generally
• C. ‘Elution’ means the desorption of the adsorbed solute by a solvent
• D. The equilibrium moisture content of the solid can be reduced by increasing the absolute humidity
Explanation:

No answer description available for this question

• ## Inside the distillation columns, the_____.

• A. Highest temperatures is near the feed plate
• B. Driving force for the liquid flow is its weight
• C. Vapors are not always at their dew points
• D. All of the above
Explanation:

No answer description available for this question

• ## With increase in absolute humidity, the dew point of an unsaturated mixture of air and water vapor (at constant pressure and temperature)

• A. Increases
• B. Remains unchanged
• C. Decreases
• D. Decreases linearly
Explanation:

No answer description available for this question

• ## In a solution containing 0.30 Kg mole of solute and 600 kg of solvent, the molality is_____.

• A. 0.50
• B. 0.60
• C. 2
• D. 1
Explanation:

No answer description available for this question

• ## At 750°K and 1 atm, the approximate value of Schmidt number for air is_____.

• A. 0.01
• B. 0.1
• C. 1
• D. 10
Explanation:

No answer description available for this question

• ## In stripping section of continuous distillation column, the_____.

• A. Liquid is stripped of high boiler
• B. Liquid is enriched with high boiler
• C. Vapour is stripped of low boiler
• D. None of these
Explanation:

No answer description available for this question

• ## ‘ADDUCTS’ and ‘CLATHRATES’ are used in case of_____.

• A. Extractive distillation
• B. Crystallisation
• C. Absorption
• D. None of these
Explanation:

No answer description available for this question

• ## For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will_____.

• A. Increase
• B. Decrease
• C. Remain same
• D. Data insufficient, can’t be predicted
Explanation:

No answer description available for this question

• ## If a two phase system is in physical equilibrium; then it means that, the_____.

• A. Escaping tendency of each component from the liquid phase to the vapor phase is exactly equal to that from vapor phase to liquid phase
• B. Temperature of the liquid phase is equal to that of the vapor phase
• C. Total pressure throughout the liquid phase is equal to that throughout the vapor phase
• D. All of the above
Explanation:

No answer description available for this question

error: Alert: Content is protected !!