Engineering Chemistry (BAS102) important questions and topics for AKTU

These are ranked by how often AKTU repeats them across 9 papers. Repeated questions and "very likely" topics are the safest marks in the exam.

Most repeated Engineering Chemistry questions

A sample of coal was burnt in a bomb calorimeter. The following data were obtained: Mass of coal = 0.92 g, Mass of water = 2500 g, Water equivalent of calorimeter = 600 g, Rise in temperature = 2.85°C, Percentage of hydrogen in coal = 3.2%. Calculate HCV and LCV of coal. (Latent heat of steam = 587 cal/g) (7 marks, 2026, Calorific Value of Fuels) – also asked in 2021, 2022, 2023, 2024, 2025
Draw and explain the Molecular Orbital (MO) diagrams of N₂ and O₂ molecules. Calculate their bond order and predict their magnetic behaviour. (7 marks, 2026, Molecular Orbital Theory) – also asked in 2021, 2022, 2023, 2024, 2025
Calculate the amount of lime (87% pure) and soda (91% pure) required to soften 1,00,000 litres of water containing: Ca(HCO₃)₂ = 32.4 mg/L, Mg(HCO₃)₂ = 29.2 mg/L, MgCl₂ = 19 mg/L, CaSO₄ = 13.6 mg/L, CO₂ = 22 mg/L. (7 marks, 2026, Water Softening Techniques) – also asked in 2021, 2022, 2023, 2024, 2025
Explain the preparation, properties and applications of Grignard reagent (RMgX). Write reactions of ethyl magnesium bromide with: (i) HCHO (ii) CH₃CHO (iii) (CH₃)₂CO (7 marks, 2026, Organometallic Compounds) – also asked in 2021, 2022, 2023, 2024, 2025
Write the preparation, properties and uses of the following polymers: (i) Dacron (ii) Bakelite (iii) Nylon-6,6 (7 marks, 2026, Industrial Polymers Properties Applications) – also asked in 2021, 2022, 2023, 2024, 2025

Molecular Orbital Theory (Unit 1: Atomic Structure, Advanced Materials and Green Chemistry) – asked 19 times in 2021, 2022, 2023, 2024, 2025, 2026
Water Softening Techniques (Unit 4: Water Technology and Fuels) – asked 16 times in 2021, 2022, 2023, 2024, 2025, 2026
UV Spectroscopy (Unit 2: Spectroscopic Techniques and Stereochemistry) – asked 15 times in 2021, 2022, 2023, 2024, 2026