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A. Co-current absorbers are usually used, when the gas to be dissolved in the liquid is a pure substance

B. In case of gas absorption, HETP is equal to HTU, when both the operating line & the equilibrium lines are parallel

C. Hatta number is important in case of gas absorption with chemical reaction

D. In actual practice, absorption is an en-dothermic process, while stripping is an exothermic process

Answer: Option D

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