Q. When the mass balance in a distillation column is F = B + D, how can D that is the distillate be increased?

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Q. Statement 1: Rectification involves the liquid and vapors to pass a cascade of stages.
Statement 2: In rectification, both heat and mass transfer takes place till equilibrium is reached.

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Q. When there is a mixture of liquids present, the boiling point lies between the boiling points of both the components.

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Q. Statement 1: Vapor phase is always more of volatile components.
Statement 2: Liquid phase is always more of high boiling point liquids.

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Q. _____ gives the relationship between the concentration of gas entering stage n and concentration of liquid leaving stage n.

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Q. Which of the following statements is correct with respect to gas absorption?

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Q. Statement 1: Packed towers are used for physical absorption.
Statement 2: Agitated vessels are used for physical absorption.

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Q. To increase the solubility of carbon-di-oxide in coke, it is subjected to high pressure.

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Q. How does the solubility of carbon-di-oxide in coke increase when it is subjected to high pressure?

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Q. Which of the following is true about an agitator vessel?

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Q. Agitator vessels are taller than bubble columns.

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Q. Extremely small packing is favorable for packed towers as the surface area increases.

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Q. Which of the following is a process/method to enhance the amount of pure distillate?

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Q. In re-fluxing, the re-flux ratio needs to a minimum.

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Q. The feed line tells us that a particular feed A is at a sub-cooled liquid. Which of the following explains the above statement?

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Q. Statement 1: Bubble point means the feed is at saturated vapor.
Statement 2: Dew point means the feed is at boiling point.

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Q. When q=(Heat required to convert one mole of feed to saturated vapor)/(Molar heat of vaporization of feed)
Statement 1: q<1 means the liquid is sub-cooled.
Statement 2: q<0 means the liquid is super heated vapor.

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Q. When q=(Heat required to convert one mole of feed to saturated vapor)/(Molar heat of vaporization of feed)
Statement 1: q<1 means the slope is a horizontal line.

Statement 2: q<1 means the slope is a vertical line.

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Q. With respect to ammonia-water system –
Statement 1: Limiting ratio is when the __(1)___ will meet __(2)__

Statement 2: When the flow rate of liquid is high, the distance between (1) and (2) decreases.

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Q. ∫yₒʸᵇdy/(y-y*) gives you _____

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