Related Questions

__________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.
A Packed
B Bubble
C Spray
D Tray
A high vapour velocity is required for high plate efficiency in a seive plate coloumn. The satisfactory value of operating vapor velocity for design purpose in seive plate column is about __________ percent of the flooding velocity.
A 45
B 60
C 80
D 95
For nearly isothermal operation involving large reaction time in a liquid-phase reaction, the most suitable reactor is a __________ reactor.
A Stirred tank
B Tubular flow
C Batch
D Fixed bed
In a gas-liquid absorption coloumn, for obtaining the maximum absorption efficiency
A Liquid stream should be distributed uniformly
B Gas stream should be distributed uniformly
C Both gas as well as liquid streams should be distributed uniformly
D By passing should be completely avoided
A coalescer in a mixer-settler liquid-liquid extraction coloumn
A Comprises of thin bed of substances of extended surface having high porosity
B Helps in increasing the bubble size entering the settler
C Helps in increasing the settling rate of the bubbles
D All of the above
Working principle of manometer comprises of balancing a coloumn of liquid against the pressure to be measured. Inclined tube manometer is especially used for the measurement of __________ pressure.
A Small differential
B Atmospheric
C Absolute
D Gage
In case of a __________ reactor, the composition in the reactor and at the exit of the reactor is the same.
A Semi-batch
B Tubular
C Batch
D Back-mix
With increase in the order of reaction (for all positive reaction orders), the ratio of the volume of mixed reactor to the volume of plug flow reactor (for identical feed composition, flow rate and conversion)
A Increases
B Decreases
C Remains same
D Increases linearly
Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.
A $${\frac{1}{{10}}^{{\text{th}}}}$$
B $${\frac{1}{{20}}^{{\text{th}}}}$$
C $${\frac{1}{{30}}^{{\text{th}}}}$$
D $${\frac{1}{{50}}^{{\text{th}}}}$$
Extraction of pencillin employs a __________ extraction coloumn.
A Centrifugal
B Packed
C Plate
D None of these

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