Total reflux in a distillation operation requires minimum____________________?
A. Reboiler load
B. Number of plates
C. Condenser load
D. All A., B. and C.
Month: February 2019
Boiling point diagram is not affected by the ambient______________________?
Boiling point diagram is not affected by the ambient______________________?
A. Pressure
B. Humidity
C. Temperature
D. Both B. and C.
Dry bulb temperature of unsaturated air is more than its ________________ temperature?
Dry bulb temperature of unsaturated air is more than its ________________ temperature?
A. Dew point
B. Wet bulb
C. Both A & B
D. Neither A nor B
Inside the distillation column, the________________________?
Inside the distillation column, the________________________?
A. Driving force for the vapour flow is the pressure drop
B. Liquids are not always at their bubble points
C. Pressure increases gradually from bottom to the top of the column
D. None of these
A mixture of 10% C6H6 vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around _______________ °C?
A mixture of 10% C6H6 vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around _______________ °C?
A. 21.7
B. 20
C. 27.3
D. 18.7
Chemisorption (chemical adsorption) is_______________________?
Chemisorption (chemical adsorption) is_______________________?
A. Same as “Van der Waals” adsorption
B. Characterised by adsorption of heat
C. An irreversible phenomenon
D. A reversible phenomenon
The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line) ?
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
When the feed to a distillation column is a saturated liquid, slope of the feed line is_____________________?
When the feed to a distillation column is a saturated liquid, slope of the feed line is_____________________?
A. Zero
B. Unity
C. Infinity
D. None of these
Fenske-Underwood equation used for calculating the minimum number of theoretical plates in distillation column is valid for_________________?
Fenske-Underwood equation used for calculating the minimum number of theoretical plates in distillation column is valid for_________________?
A. Constant molal overflow
B. Total reflux
C. Constant relative volatility
D. All A., B. and C.
Solvent used in extractive distillation_________________________?
Solvent used in extractive distillation_________________________?
A. Is of low volatility
B. Forms a low boiling azeotrope
C. Forms a high boiling azeotrope
D. Does not alter the relative volatility of the original components