Engineering Chemistry (BAS102) AKTU exam strategy

Focus on Unit 1 (Atomic Structure, Advanced Materials and Green Chemistry) and Unit 2 (Spectroscopic Techniques and Stereochemistry). Together they account for about 53 marks among all questions printed per paper. Unit 3 (Electrochemistry, Batteries, Corrosion and Engineering Materials) is safest to skim if you're short on time.

Unit priority

Unit 1 (Atomic Structure, Advanced Materials and Green Chemistry) – Must Prepare, 27 marks avg. Unit 1 (Atomic Structure, Advanced Materials and Green Chemistry) averages 27 marks per paper — one of the heaviest units in this subject. Nanomaterials has appeared in every paper analysed — these are must-dos. Must-do: Molecular Orbital Theory, Nanomaterials, Liquid Crystals, Green Chemistry.
Unit 2 (Spectroscopic Techniques and Stereochemistry) – High Priority, 26 marks avg. Unit 2 (Spectroscopic Techniques and Stereochemistry) averages 26 marks per paper — one of the heaviest units in this subject. UV Spectroscopy and IR Spectroscopy have appeared in every paper analysed — these are must-dos. Must-do: UV Spectroscopy, IR Spectroscopy, NMR Spectroscopy, Optical Isomerism.
Unit 4 (Water Technology and Fuels) – High Priority, 26 marks avg. Unit 4 (Water Technology and Fuels) averages 26 marks per paper — one of the heaviest units in this subject. Must-do: Water Softening Techniques, Calorific Value of Fuels, Coal Analysis, Hardness of Water.
Unit 5 (Polymers and Organometallic Compounds) – Medium Priority, 26 marks avg. Unit 5 (Polymers and Organometallic Compounds) averages 26 marks per paper — one of the heaviest units in this subject. Must-do: Classification of Polymers, Industrial Polymers Properties Applications, Organometallic Compounds, Polymerization Processes.
Unit 3 (Electrochemistry, Batteries, Corrosion and Engineering Materials) – Safe to Skim, 25 marks avg. Unit 3 (Electrochemistry, Batteries, Corrosion and Engineering Materials) averages 25 marks per paper — one of the heaviest units in this subject. Basic Electrochemistry Concepts has appeared in every paper analysed — these are must-dos. Must-do: Corrosion, Basic Electrochemistry Concepts, Cement, Batteries and Cells.

Topics AKTU keeps repeating

Molecular Orbital Theory: Asked in 6 out of 9 papers. If you prepare only one topic from its unit, make it this one.
Liquid Crystals: Asked in 6 out of 9 papers. If you prepare only one topic from its unit, make it this one.

Short on time?

Among all units, Unit 3 (Electrochemistry, Batteries, Corrosion and Engineering Materials) is the lowest priority at 25M avg. If you're running low on time, prioritize the top 3 units and give this one a quick read. But even here — Corrosion, Basic Electrochemistry Concepts, Batteries and Cells are high-repeat topics. Cover these at minimum to stay safe.

How the paper is marked

Section A: 7 questions × 2 marks = 14 marks. Short definition/concept questions from all 5 units. Prepare 2–3 key definitions per unit — this section is the easiest 14 marks you can secure.
Section B: Attempt any 3 of 5 questions × 7 marks = 21 marks. Choose the 3 questions from units you've prepared most. Don't attempt all 5 — pick your strongest 3 and write them well.
Section C: 5 OR-pairs × 7 marks = 35 marks. One pair per unit — you must attempt all 5. This is where the exam is won or lost. Focus your deep preparation on the top 3 priority units.

Exam-day tips

Start with Section A to build momentum — budget 15–20 minutes max for all 7 questions.
In Section B, Unit 1 (Atomic Structure, Advanced Materials and Green Chemistry) questions have the highest repeat rate — always attempt that one first.
For Section C OR-pairs, read both options before choosing — sometimes the 'b' option is simpler despite appearing longer.
If you've prepared the VERY LIKELY topics, you can comfortably score 50+ marks without touching any new topic on exam day.
This strategy is built on 9 past papers — the patterns here are highly reliable.