Q. The value of L/mG ratio for economical absorption operation ranges from

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Q. Large scale usage of flash distillation is practised in

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Q. Which of the following is not a continuous leaching equipment ?

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Q. __________ extractor is used for the concentration of radioactive nuclear waste.

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Q. Moisture content of a substance when at equilibrium with a given partial pressure of the vapour is called the __________ moisture.

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Q. All moisture in a non-hygroscopic material is the __________ moisture.

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Q. Pick out the correct relationship. (where, Ri = internal reflux ratio Ro = external reflux ratio. )

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Q. Separation of __________ employs gaseous diffusion process.

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Q. For water-ethanol system, the minimum reflux ratio

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Q. The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m²/m³)

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Q. 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 hysterisis. In such cases, the desorption equilibrium pressure is __________ that obtained for adsorption.

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Q. Experimental determination of __________ is done by wetted wall column method.

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Q. Pore size of the molecular seive 5A is __________ mm.

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Q. Swenson-Walker crystalliser is a __________ unit

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Q. According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B ? Assume that relative volatility (αᴀʙ = 2) does not change appreciably in the coloumn.

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Q. Absorption (liquid-gas system) with evolution of heat as compared to isothermal absorption results in

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Q. With increase in temperature, the mutual solubility of two liquids

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Q. Pick out the wrong statement.

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Q. The relative volatility of a binary mixture at the azeotropic composition is

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Q. Relative volatility varies with the concentration of component for an ideal solution. The relative volatity of a binary mixture may be defined as the ratio of vapor pressure of component 'A' to that of component 'B', when

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