21. When the temperature and humidity of air is low, we usually use __________ draft cooling tower.
22. For the flow of gases through a capillary, with increase in temperature, the permeability __________ as per Knudsen law.
23. Extraction of pencillin employs a __________ extraction coloumn.
24. The relative volatility of a binary mixture at constant temperature __________ the total pressure.
25. For the case of flow of air past a wet bulb thermometer (air water vapour system), the approximate value of H₂/ky.Cz is around
26. The surface renewal frequency in Danckwerts model of mass transfer is given by (KL: mass transfer co-efficient)
27. Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and
28. Pick out the correct statement.
29. Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 × 10-3 kg mole/m2.s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m2.s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively is
30. Small dia distillation column can be a
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