(SEM-I) THEORY EXAMINATION 2019-20 CHEMISTRY

This is a complete AKTU B.Tech 1st Semester (KAS102) Engineering Chemistry question paper of 100 marks, designed exactly as per the university examination pattern. The paper is divided into Section A, Section B, and Section C, covering all major topics such as bonding, phase rule, spectroscopy, water treatment, fuel chemistry, coal analysis, polymers, corrosion, thermochemistry, calorimetry, electrochemistry, and organic reagents like Grignard compounds.

This question paper is extremely useful for AKTU students preparing for semester exams, internal tests, and quick revision of important concepts. It includes a balanced mix of numerical problems, derivations, definitions, reasoning questions, short notes, and application-based questions.

Detailed Breakdown of Question Paper

SECTION A – Very Short Answer Questions (10 × 2 = 20 marks)

This section checks conceptual clarity of fundamental chemistry topics. Key areas include:

Stability order based on molecular orbital theory (N₂ series)

Schottky defect with example

Stokes vs Anti-Stokes lines in Raman spectrum

Fingerprint region in IR spectroscopy

Corrosion behavior of metals (nails in wood)

Phase determination in saturated NaCl system

Water hardness calculations (ppm, °Fr)

HCV & LCV calculation for coal (Dulong’s formula)

Concept of non-polymerizing simple molecules

Applications of polymer composites

These questions are ideal for quick revision.

SECTION B – Descriptive Questions (Any 3 × 10 = 30 marks)

This section includes medium to long derivations and numericals:

MO diagrams of NO and O₂, bond order & magnetic nature

Lambert-Beer’s Law + calculation of absorbance & molar extinction coefficient

Phase rule & water system diagram: triple point, curves, areas, degrees of freedom

Principle & working of Bomb Calorimeter + coal GCV/NCV calculation

Preparation, properties & applications of major polymers (Buna-N, Nylon 6,6, Terylene, Neoprene, Kevlar)

These questions help students understand spectroscopy, thermochemistry, polymer science, and molecular bonding.

SECTION C – Long Answer Questions (5 × 10 = 50 marks)

Each question has two alternatives; attempt one from each.

Q3 – Carbon Allotropes / Liquid Crystals

Preparation, properties & applications of fullerenes (C₆₀ – truncated icosahedron)
OR

Concept & classification of liquid crystals + applications

Q4 – Raman & IR Spectroscopy

Selection rules for Raman; technological advances; choosing IR/Raman based on bonds
OR

Short notes on UV shift, applications of IR, molecular vibration

Q5 – Corrosion / Nernst Equation

Electrochemical corrosion theory + sacrificial & impressed current protection
OR

Use of Nernst equation to calculate pH using electrode potentials

Q6 – Water Softening / Calgon Treatment

Lime–soda calculation for given raw water analysis
OR

Demineralization vs Zeolite process + reactions of Calgon treatment

Q7 – Conducting Polymers / Grignard Reagent

Conducting polymers: classification & applications
OR

Grignard reagent and its five major synthetic applications

These questions strengthen understanding of advanced chemical processes, spectroscopy, electrochemistry, water treatment, polymers, and industrial chemistry.

Why This Question Paper Is Important for Students

This question paper is extremely valuable because it:

Follows the authentic AKTU exam pattern

Covers all high-weightage topics from KAS102

Includes important numericals (water hardness, calorimetry, coal GCV/NCV, Nernst equation)

Helps build strong conceptual chemistry fundamentals

Prepares students for internal exams, viva, and competitive exams

Includes many repeat-type and expected questions

Perfect for final revision before the AKTU semester exam.