Engineering Chemistry Unit 3 – Electrochemistry, Batteries, Corrosion and Engineering Materials: important questions for AKTU
Unit 3 (Electrochemistry, Batteries, Corrosion and Engineering Materials) questions that AKTU repeats most often. This unit carries about 25 marks per paper. Start with the repeated questions, then the most asked topics.
Most repeated Unit 3 questions
- Discuss the construction and chemistry of charging/discharging of Lead Acid battery. (7 marks, 2025, Batteries and Cells) – also asked in 2021, 2022, 2023, 2024, 2026
- Explain the mechanism of Hydrogen evolution and Oxygen absorption with the help of electrochemical theory of corrosion. Explain noble and sacrificial metallic coatings for preventing corrosion. (7 marks, 2024, Corrosion) – also asked in 2021, 2022, 2023, 2025, 2026
- Differentiate between primary and Secondary batteries? Discuss the various reactions involve during the charging and discharging of lead storage battery. (7 marks, 2024, Batteries and Cells) – also asked in 2021, 2022, 2023, 2025, 2026
Most important Unit 3 topic
- Corrosion (Unit 3: Electrochemistry, Batteries, Corrosion and Engineering Materials) – asked 15 times in 2021, 2022, 2023, 2024, 2025, 2026
Most asked Unit 3 topics
- Corrosion – asked 15 times
- Basic Electrochemistry Concepts – asked 9 times
- Cement – asked 8 times
More Unit 3 previous year questions
- What is Plaster of Paris (POP)? Write its chemical formula. (2 marks, 2026, Cement)
- Explain the working of a Galvanic cell with a neat diagram. Also derive the expression for equilibrium constant K from cell EMF. (7 marks, 2026, Basic Electrochemistry Concepts)
- Explain the mechanism of wet corrosion of iron with the help of electrochemical theory. What are the factors affecting the rate of corrosion? (7 marks, 2026, Corrosion)
- Explain the setting and hardening of cement with relevant chemical reactions. What is the role of water in this process? (7 marks, 2026, Cement)
- Why does part of a nail inside the wood under goes corrosion explain it? (2 marks, 2025, Corrosion)
Unit 3 syllabus topics
- Basic Electrochemistry Concepts
- Batteries and Cells
- Corrosion
- Cement