BT-101 RGPV B.Tech
Engineering Chemistry (EC)
Previous year papers and the official syllabus are free to read, no account needed.
Previous Year Papers
8 papers, latest Dec 2025
- BT-101 paper, Dec 2025
- BT-101 paper, Jun 2025
- BT-101 paper, Dec 2024
- BT-101 paper, Jun 2024
- BT-101 paper, Dec 2023
- BT-101 paper, Jun 2023
Syllabus, notes and important questions for BT-101
Syllabus units
Topics as the official RGPV syllabus lists them.
Unit 1 Water – Analysis, Treatments and Industrial Applications 3 topics
- Sources and impurities of water
- Hardness and its units; determination of hardness by EDTA complexometric titration
- Alkalinity determination and related numerical problems
Unit 2 Boiler Problems and Softening Methods 2 topics
- Boiler troubles: sludge and scale, priming and foaming, boiler corrosion, caustic embrittlement
- Softening methods: lime‑soda, zeolite, ion‑exchange
Unit 3 Lubricants and Lubrication 5 topics
- Introduction and mechanism of lubrication
- Classification of lubricants
- Viscosity and viscosity index determination
- Flash & fire points, cloud & pour points, aniline point, acid number, saponification number, steam emulsification number
- Related numerical problems
Unit 4 Polymers and Polymerisation 5 topics
- Introduction to polymers and types of polymerisation
- Classification and mechanism of polymerisation (free‑radical and ionic)
- Thermoplastic and thermosetting polymers
- Biodegradable polymers
- Preparation, properties and uses of PVC, PMMA, Teflon, Nylon‑6, Nylon‑6:6, polyester, phenol‑formaldehyde, urea‑formaldehyde, Buna‑N, Buna‑S, vulcanisation of rubber
Unit 5 Phase Equilibrium and Corrosion 3 topics
- Phase diagram of single‑component system (water)
- Phase diagram of binary eutectic system (Cu‑Ag)
- Corrosion: types, mechanisms and prevention
Unit 6 Spectroscopic Techniques and Applications 2 topics
- Principles, instrumentation and applications of electronic spectroscopy
- Vibrational and rotational spectroscopy of diatomic molecules
Unit 7 Periodic Properties 6 topics
- Effective nuclear charge
- Variation of s, p, d and f orbital energies across the periodic table
- Electronic configuration
- Atomic and ionic sizes
- Electron affinity and electronegativity
- Polarizability and oxidation states
Exam insights
Counted from 6 past BT-101 papers.
Marks asked per paper, by unit
-
Unit 1 Water – Analysis, Treatments and Industrial Applications 15 marks
-
Unit 2 Boiler problem & softening methods 21 marks
-
Unit 3 Lubricants and Lubrication 16 marks
-
Unit 4 Polymer & polymerization 19 marks
-
Unit 5 Phase equilibrium and Corrosion 16 marks
-
Unit 6 Spectroscopic techniques and application 15 marks
-
Unit 7 Periodic properties 9 marks
Average marks of the questions from each unit in one paper. You answer only some of them, so the total is more than the paper’s maximum.
Asked again and again
-
Describe the ion-exchange process for softening of water with neat diagram.
Asked 3 times: 2024, 2023, 2022
-
State and explain Beer-Lambert's law.
Asked 3 times: 2023, 2022
-
Explain the trends in electronegativity, ionic size and electron affinity of s- and p-block elements in groups and periods with reasons
Asked 3 times: 2023