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 5 topics
- Sources of water
- Impurities in water
- Hardness and its units
- Determination of hardness by EDTA method
- Alkalinity determination and related numerical problems
Unit 2 Boiler Problems & Softening Methods 7 topics
- Boiler troubles: sludge and scale
- Boiler troubles: priming and foaming
- Boiler corrosion and caustic embrittlement
- Softening methods: lime‑soda process
- Softening methods: zeolite process
- Softening methods: ion‑exchange process
- Related numerical problems
Unit 3 Lubricants and Lubrication 11 topics
- Introduction to lubrication
- Mechanism of lubrication
- Classification of lubricants
- Viscosity and viscosity‑index determination
- Flash and fire points
- Cloud and pour points
- Aniline point
- Acid number
- Saponification number
- Steam‑emulsification number
- Related numerical problems
Unit 4 Polymer & Polymerisation 15 topics
- Introduction to polymers
- Types of polymerisation
- Classification of polymers
- Mechanism of polymerisation: free‑radical
- Mechanism of polymerisation: ionic
- Thermoplastic and thermosetting polymers
- Biodegradable polymers
- Properties and uses of PVC
- Properties and uses of PMMA
- Properties and uses of Teflon
- Properties and uses of Nylon 6 and Nylon 6:6
- Properties and uses of polyester‑phenol‑formaldehyde
- Properties and uses of urea‑formaldehyde
- Properties and uses of Buna N and 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 5 topics
- Principles of spectroscopic techniques
- Instrumentation and applications
- Electronic spectroscopy
- Vibrational spectroscopy of diatomic molecules
- Rotational spectroscopy of diatomic molecules
Unit 7 Periodic Properties 7 topics
- Effective nuclear charge
- Orbital‑energy variations (s, p, d, f)
- Electronic configuration
- Atomic and ionic sizes
- Electron affinity and electronegativity
- Polarizability
- Oxidation states
Exam insights
Counted from 6 past BT-101 papers.
Marks asked per paper, by unit
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Unit 1 Water – Analysis, Treatments and Industrial Applications 15 marks
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Unit 2 Boiler problem & softening methods 21 marks
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Unit 3 Lubricants and Lubrication 16 marks
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Unit 4 Polymer & polymerization 19 marks
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Unit 5 Phase equilibrium and Corrosion 16 marks
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Unit 6 Spectroscopic techniques and application 15 marks
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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
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Describe the ion-exchange process for softening of water with neat diagram.
Asked 3 times: 2024, 2023, 2022
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State and explain Beer-Lambert's law.
Asked 3 times: 2023, 2022
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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