The GATE Grind

GATE Process Calculations: Steady and unsteady state mass and energy balances – Previous Year Questions

8 GATE previous year questions on Steady and unsteady state mass and energy balances (Process Calculations, Chemical Engineering) with answers and explanations, from every paper.

  1. GATE 2023 CH Q32 (1 mark, Numerical answer) – Burning of methane in a combustor yields carbon monoxide, carbon dioxide, and water vapor. Methane is fed to the combustor at 100 mol hr-1, of which…
  2. GATE 2023 CH Q49 (2 marks, Numerical answer) – Wet air containing 10 mole percent water vapor is dried by continuously passing it through a column of CaCl 2 pellets. The pellets remove 50 percent…
  3. GATE 2023 CH Q50 (2 marks, Numerical answer) – Orsat analysis showing the composition (in mol %, on a dry basis) of a stack gas is given in the table below. The humidity measurement reveals that…
  4. GATE 2024 CH Q31 (1 mark, Numerical answer) – Consider the reaction N 2(g) + 3H 2(g) 2NH 3(g) in a continuous flow reactor under steady-state conditions. The component flow rates at the reactor…
  5. GATE 2024 CH Q55 (2 marks, Numerical answer) – Methane combusts with air in a furnace as CH 4 + 2O 2 CO 2 + 2H 2O. The heat of reaction H rxn = -880 kJ per mol CH 4 and is assumed to be constant.…
  6. GATE 2026 CH Q27 (1 mark, Multiple select) – Which of the following statements regarding the heat of reaction is/are CORRECT?
  7. GATE 2026 CH Q57 (2 marks, Numerical answer) – A feed containing 10 mol % propylene, 15 mol % ammonia and rest air is charged into a reactor to produce acrylonitrile (C 3H 3N) according to the…
  8. GATE 2026 CH Q58 (2 marks, Numerical answer) – A gas mixture of 50 wt. % argon and 50 wt. % helium flowing through a horizontal tube of uniform diameter at a rate of 1 kg s-1 is heated from 300 K…