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Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the ___________________ moisture ?
Related MCQs
The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the__________?
Swenson-Walker crystalliser is a __________ unit ?
A 25 cm × 25 cm × 1 cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions. It took 1500 seconds for the weight of the sheet to reduce to 1.05 kg. Another 1m × 1m × 1cm flat sheet of the same material is to be dried from one side only. Under the same constant drying rate conditions, the time required for drying (in seconds) from its initial weight of 19.2 kg to 17.6 kg is __________?
Henry’s law states that the __________?
Desulphurisation of petrol is done in a __________?
Pressure drop through plate tower as compared to that through packed tower, for the same duty will be__________?
For gas absorption, low viscosity solvents are preferred, because of their __________?
Which of the following increases during evaporative cooling process with recirculated water supply ?
Drying of a solid involves __________ transfer ?
In case of absorption & stripping, the interface of the liquid & gas phases are present in equilibrium, when the diffusional resistance of __________ is zero?
Which of the following is used for the concentration of rubber latex ?
Operating velocity in a packed tower is usually __________ the flooding velocity ?
For stripping of a gas in a counter current stripper, the operating line __________?
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The Reynolds number of the liquid was increased 100 fold for a laminar falling film used for gas-liquid contacting. Assuming penetrating theory is applicable, the fold increase in the mass transfer co-efficient (Kc) for the same system is__________?
Large scale usage of flash distillation is practised in __________?
The boiling points of pure components of a binary system __________ with increase in total pressure of the system ?
During sensible cooling process __________?
The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if__________?
Pick out the wrong statement ?
In triangular co-ordinates, the ternary composition point falls __________ of the triangle?
Co-current absorbers are usually used when the gas to be dissolved in the liquid is __________?
When acetone is added in a two layer mixture of methyl isobutyl ketone and water at 30°C, the acetone distributes between the two layers and the composition of the layer follows two solubility curves. For this system ?
Molecular sieves are regenerated by heating to __________ °C?
Pick out the wrong statement. Generally for physical adsorption, a gas of__________?
Which of the following processes is followed by unsaturated air (with dry bulb temperature 12°C and relative humidity 47%) passing through water spray washer (temperature of water being constant at 40°C ?
Which of the following is not fixed by the process requirements, in the design of absorbers ?
Reboiler is considered as one theoretical plate, because__________?
With increase in the mass velocity of the gas, the rate of drying during the constant rate period __________, if the conduction and radiation through the solid are negligible ?
Large scale drying of wheat is done in a __________ dryer?
With increase in temperature, the leaching rate increases due to__________?
In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed__________?
Though, theoretically the adsorption & desorption isotherms is expected to coincide but sometimes at least a part of the isotherms does not coincide and this phenomenon is known as adsorption hysteresis. In such cases, the desorption equilibrium pressure is __________ that obtained for adsorption?
In an absorption column, the flooding velocity for random packing is __________ that for stacked/regular packing?
In case of cooling towers, the ratio of the rates of heat and mass transfer is indicated by the __________ number ?
Unsaturated air (with dry and wet bulb temperatures being 35 and 25°C respectively) is passed through water spray chamber maintained at 35°C. The air will be__________?
Mass transfer co-efficient is defined as__________?
Large quantity of silica gel is normally dried in a __________ dryer?
The value of „L/mG’ ratio for economical absorption operation ranges from __________?
In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction xf = 0.2. The mixture splits into an extract phase E and a raffinate phase R containing A at xB = 0.5 and xR = 0.05 respectively. The total mass of the extract phase is (in Kg) ?
Dried finished product sampled from various parts of a __________ dryer exhibits nonuniformity in the moisture content?
In steam distillation, the __________?
A slurry is to be dried to produce flaky solid. Which dryer would you recommend ?
Which of the following parameters remains constant during chemical dehumidification ?
Coffee is prepared from coffee beans by leaching with__________?
The equation, NA = (DAB . Pt /RTZ) (y1 – y2) is for __________?
Penetration theory states that the mass transfer co-coefficient is equal to (where, De is diffusivity and ‘t’ is time) ?
The relative volatility of a binary mixture at the Azeotropic composition is __________?
For absorbing a sparingly soluble gas in a liquid, the__________?
Moisture content of a substance when at equilibrium with a given partial pressure of the vapour is called the __________ moisture?
For the flow of gases through a capillary, with increase in temperature, the permeability __________ as per Knudsen law?
Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the ___________________ moisture ?
A. Unbound
B. Critical
C. Free
D. Bound
Correct Answer:
Unbound
✔
Last Updated:
February 15, 2019