The GATE Grind

GATE Metallurgical Thermodynamics: Electrochemistry – Previous Year Questions

6 GATE previous year questions on Electrochemistry (Metallurgical Thermodynamics, Metallurgical Engineering) with answers and explanations, from every paper.

  1. GATE 2021 MT Q26 (1 mark, Numerical answer) – Given E Ni2+/Ni=-0.25 V and F=96500 C/mol, the standard chemical potential Ni2+ at 298 K is J/mol (nearest integer).
  2. GATE 2022 MT Q49 (2 marks, Numerical answer) – The cell Au–Pb(liquid) PbCl 2–KCl(liquid) Cl 2(gas, 0.5 atm), C(graphite) has emf 1.2327 V at 873 K. Pb activity in the alloy is 0.72; PbCl 2 activity…
  3. GATE 2023 MT Q62 (2 marks, Numerical answer) – An aqueous solution contains Fe2+ at 10-4 M, 298 K, and atmospheric pressure. The iron reduction potential is V (two decimal places). Given: E…
  4. GATE 2024 MT Q57 (2 marks, Numerical answer) – At 298 K, the Cu2+ concentration needed to make the potential of pure copper 0.17 V is 10-6 gram-mol L-1 (two decimal places). Given: R=8.314 J mol-1…
  5. GATE 2025 MT Q55 (2 marks, Numerical answer) – For Mg+Cd2+Mg2++Cd, the standard Gibbs free energy change is kJ (rounded to an integer). Standard oxidation potentials relative to the standard…
  6. GATE 2026 MT Q64 (2 marks, Numerical answer) – Al 2O 3 can be electrolyzed with an inert or a carbon anode. The overall reactions are: I, inert anode: 23Al 2O 3(s)43Al(l)+O 2(g), with G…