About this previous year paper
This question paper is designed for Engineering Chemistry and covers important topics such as water treatment, spectroscopy, bonding, polymers, stereochemistry, corrosion, fuels, biogas, IR vibrations, and molecular structure.
It is divided into three sections that test conceptual clarity, numerical ability, and applied understanding.
SECTION – A (10 × 2 = 20 Marks)
This section contains ten short answer questions focusing on basic definitions and direct concepts.
Topics include:
Temporary & permanent hardness of water
β-carotene and visible absorption
NCV vs GCV
Bonding vs antibonding orbitals
Polymer & polymerization
Unit cell types
Elastomers
Bond order of O₂
Number of NMR signals in ethanol
Priming & foaming in boilers
This section checks fundamental chemistry knowledge.
SECTION – B (5 × 10 = 50 Marks)
Students must attempt any five medium-length descriptive questions.
Topics include:
Metallic bonding and MO theory; bond order of N₂ and O₂
Addition vs condensation polymerization; preparation of PMMA, Orlon, Polystyrene
Zeolite water softening process and hardness calculation
Optical isomerism in tartaric acid; enantiomers vs diastereomers
Chromophores and auxochromes; UV absorbance numerical
Electrochemical corrosion: mechanism and rust calculation
Structure of graphite and its conductivity; SN1 vs SN2 mechanism
This section tests application, diagrams, numericals, and chemical mechanisms.
SECTION – C (2 × 15 = 30 Marks)
Students must attempt any two long descriptive questions.
Topics include:
Biogas
Production process, biogas plant diagram
Potable water & its chemical requirements
Biodegradable polymers
Uses and preparation
Synthesis of Bakelite, Perspex, and cis-1,4 polyisoprene
IR Spectroscopy & Water Hardness
Vibrational modes (stretching & bending) of XY₂ bent molecule
Calculation of temporary and total hardness
This section evaluates deep understanding, derivations, numerical solutions, and process-based chemistry.