The GATE Grind

GATE Mass Transfer: Absorption – Previous Year Questions

4 GATE previous year questions on Absorption (Mass Transfer, Chemical Engineering) with answers and explanations, from every paper.

  1. GATE 2024 CH Q40 (2 marks, Multiple choice) – A gas stream containing 95 mol% CO 2 and 5 mol% ethanol is to be scrubbed with pure water in a counter-current, isothermal absorption column to remove…
  2. GATE 2025 CH Q55 (2 marks, Numerical answer) – Gas containing 0.8 mol% component A is to be scrubbed with pure water in a packed bed column to reduce the concentration of A to 0.1 mol% in the exit…
  3. GATE 2026 CH Q48 (2 marks, Multiple choice) – A gas stream with 2.01 mol % ammonia is to be scrubbed in a counter-current isothermal packed bed absorber using pure water to reduce its…
  4. GATE 2026 CH Q61 (2 marks, Numerical answer) – The flooding velocity curves for two different structured packings are shown in the figure. The ratio of mass velocities of liquid (G x) to that of…