(SEM II) THEORY EXAMINATION 2017-18 ENGINEERING CHEMISTRY

This document contains the complete Engineering Chemistry (RAS202) Theory Examination Paper for B.Tech Semester II, conducted in the academic year 2017–18. The exam carries 70 marks and has a duration of 3 hours. It evaluates a student’s understanding of chemical bonding, polymers, electrochemistry, corrosion, water treatment, fuels, phase rule, nanomaterials, spectroscopy, and industrial chemistry concepts.
 

The paper is divided into three major sections—A, B, and C—covering definitions, theory, numerical problems, and applied chemistry concepts.

SECTION A – Short Conceptual Questions (14 Marks)

This section consists of seven short-answer questions, covering:

Bond order calculation

Electrical conductivity of graphite

Functionality of polymers

Electrochemical reactions in a lead-acid storage cell

Corrosion behavior in metals

Calgon conditioning (water softening)

Calculation of GCV and NCV of coal

These questions test essential definitions and fundamental chemical principles.
 

SECTION B – Descriptive & Numerical Questions (21 Marks)

Students must attempt any three of the following, covering applied chemistry topics:

Molecular Orbital Theory and differentiation among conductors, semiconductors, and insulators

Preparation, properties, and applications of BUNA-N, Terylene, and intrinsically conducting polymers

Construction & working of Galvanic cell and mechanisms of lubrication

Lime–soda calculation for water softening and application of the phase rule to water

Air requirement for complete combustion of fuel and composition & working of a biogas plant

This section assesses applied chemistry problem-solving skills.
 

ENGINEERING-CHEMISTRY-RAS202-1

SECTION C – Advanced Theory, Defects, Materials & Instrumentation (35 Marks)

Each question carries 7 marks; students attempt one from each pair:

Part 1 – Solid State Chemistry & Nanoscience

Schottky and Frenkel defects

Properties and applications of fullerenes

Paramagnetism of O₂

Applications of nanomaterials in electronics and medicine

Part 2 – Organic & Composite Materials

Grignard reagents, preparation, and applications

Definition and classification of composite materials

Part 3 – Corrosion & Cement Manufacturing

Electrochemical theory of corrosion and sacrificial protection with zinc

Manufacturing process & chemical composition of Portland cement, including setting and hardening

Part 4 – Water Softening & Phase Rule

Zeolite process, regeneration, and hardness calculation

Explanation of phase, components, and degree of freedom

Part 5 – Spectroscopy & Fuel Analysis

Chemical shift, shielding/deshielding, interpretation of proton NMR data

Explanation of GCV, NCV, and working of the bomb calorimeter

This section evaluates deep conceptual understanding of materials chemistry, electrochemistry, spectroscopy, and industrial processes.