Question: Molecular diffusivity of a liquid [A]. increases with temperature. [B]. decreases with temperature. [C]. may increase or decrease with temperature. [D]. is independent of temperature. Answer: Option A Explanation: No answer description available for this question.

Question: For stripping of a gas in a counter current stripper, the operating line [A]. lies above the equilibrium curve. [B]. lies below the equilibrium curve. [C]. can lie above or below the equilibrium curve. [D]. is always parallel to…

Question: 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 [A]. q > 1 [B]. q < 1 [C]. q = 1 [D]. q…

Question: For absorbing a sparingly soluble gas in a liquid [A]. gas side mass transfer co-efficient should be increased. [B]. liquid side mass transfer co-efficient should be increased. [C]. liquid side mass transfer co-efficient should be decreased. [D]. mass transfer…

Question: In gas-liquid contact operation, the number of ideal stages, . This is true when the stripping factor ‘S’ is [A]. S > 1 [B]. S < 1 [C]. S = 1 [D]. S = ∞ Answer: Option A Explanation:…

Question: Mass transfer co-efficient ‘K’ according to penetration theory varies with mass dif-fusivity as [A]. D0.5 [B]. D [C]. 1/D [D]. D1.5 Answer: Option A Explanation: No answer description available for this question.

Question: If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is [A]. 0.31 [B]. 0.107 [C]. 0.017 [D]. 0.215 Answer: Option D Explanation:…

Question: Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a [A]. higher dew point. [B]. higher absolute (specific) humidity. [C]. higher relative…

Question: In an interphase mass transfer process, the lesser the solubility of a given solute in a liquid, the higher are the chances that the transfer process will be [A]. liquid phase resistance-controlled. [B]. gas phase resistance controlled. [C]. impossible.…

Question: For a fixed number of ideal stages in a distillation column, as the reflux ratio is increased, the difference in composition between the top and bottom product streams [A]. increases [B]. decreases [C]. remains unaffected [D]. passes through a…