THEORY EXAMINATION (SEM–II) 2016-17 ENGINEERING CHEMISTRY

This question paper assesses core concepts of Engineering Chemistry, including spectroscopy, polymers, water treatment, fuels, corrosion, phase rule, galvanic cells, cement chemistry, and material science.
It is divided into three sections that test definitions, numerical skills, mechanisms, and applications.

SECTION – A (7 × 2 = 14 Marks)

This section contains seven short questions, requiring brief definitions or direct numerical answers.
Topics include:

Equivalent vs non-equivalent protons

Use of magnesium blocks for corrosion protection

GCV and NCV

Formation reactions of Nylon-6,6 and Buna-S

Temporary hardness calculation

Preparation of greases

Composition and raw materials of biogas

This section checks basic fundamentals and quick concepts.

SECTION – B (5 × 7 = 35 Marks)

Students must attempt any five medium-length questions.
Topics include:

Structure/applications of fullerenes; Stoichiometric defects (Frenkel & Schottky)

Conducting polymers; Preparation & reactions of Grignard reagent

Galvanic cell principle; Setting & hardening of cement

Reverse osmosis; Scale & sludge formation in boilers and prevention

Corrosion prevention by design; Structure & lubrication properties of graphite

Proximate analysis of coal; Bomb calorimeter GCV/NCV calculation

IR spectroscopy principle, IR vibrations of XY₂, fingerprint region

TMS as NMR reference; NMR signals & splitting patterns of given compounds

This section tests theory, chemical mechanisms, and applied numericals.

SECTION – C (2 × 10.5 = 21 Marks)

Students must attempt any two long descriptive questions.
Topics include:

Phase Rule & Water System

Phase rule application to ice–water–vapour equilibrium

Quadruple point concept

Zeolite softener hardness calculation

Polymer Chemistry

Mechanism of polypropylene formation using Ziegler–Natta catalyst

Advantages over free-radical polymerization

Polymer composites

Corrosion & MO Theory

Electrochemical corrosion (oxygen absorption mechanism)

Anodic & cathodic metallic coating protection

MO diagrams of N₂ and O₂ with bond order

This section evaluates analytical reasoning, mechanisms, diagrams, and detailed conceptual understanding.