7431. Rate of leaching increases with increasing
Temperature
Viscosity of solvent
Pressure
Size of the solid
✅ The correct answer is option A.
Chemical Engineering
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7432. Which of the following remains constant during evaporative cooling process with recirculated water supply?
Relative humidity
Partial pressure of vapour
Wet bulb temperature
None of these
✅ The correct answer is option C.
7433. Molecular diffusivity of a liquid
Increases with temperature
Decreases with temperature
May increase or decrease with temperature
Is independent of temperature
✅ The correct answer is option A.
7434. Humid volume is the total volume in m³ of 1 kg of
Vapour laden gas at 1 atm. and room temperature
Gas plus its accompanying vapour at 1 atm. and room temperature
Gas plus its accompanying vapour at 1 atm. and gas temperature
Vapour laden gas at 1 atm. and gas temperature
✅ The correct answer is option C.
7435. Priming in a distillation column
Results from very low gas velocity
Is desirable from point efficiency consideration
Is characterised by the presence of foam throughout the space between trays
Reduces the overall pressure drop
✅ The correct answer is option C.
7436. The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives
Low pressure drop and high hold up
High pressure drop and low hold up
Low pressure drop and low hold up
High pressure drop and high hold up
✅ The correct answer is option C.
7437. In most of the vacuum crystalliser, vacuum is generally produced by means of a
Suction pump
Compressed air jet
Steam jet ejector with a barometric condenser
None of these
✅ The correct answer is option C.
7438. In steam distillation, the
Temperature is 100°C
Temperature is more than 100° C
Product must be immiscible with water
Temperature is higher than the boiling point of either component
✅ The correct answer is option C.
7439. __________ equation applies to diffusivities in liquids.
Gilliland
Hirschfelder
Wilke and Chang
None of these
✅ The correct answer is option A.
7440. Radioactive nuclear waste is treated in
Mixer-settler extractor
Rotating-disc contactor
Pulsed column extractor
Bollman extractor
✅ The correct answer is option C.