ENSH 103Bachelor in Civil Engineering · Semester 13 Papers Available

Engineering Chemistry

Past examination question papers and complete curriculum syllabus for Engineering Chemistry (ENSH 103), Bachelor in Civil Engineering Semester 1 under Institute of Engineering (IOE), Tribhuvan University.

Sem 1 Subjects (7)View Full Semester Overview →

ENSH 101Engineering Mathematics I ENSH 103Engineering Chemistry ENCT 101Computer Programming ENEE 103Basic Electrical and Electronics Engineering ENCE 101Engineering Mechanics ENCE 102Engineering Geology I ENCE 103Civil Engineering Materials

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Most Frequently Asked Questions

Top recurring IOE board exam questions for Engineering Chemistry with verified mark schemes, formula notation, and recurrence frequency.

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6 Chapters · Click any chapter to expand

Year-wise & Session-wise Exam Papers

Complete questions from each exam session (Regular & Back exams from 2082 to 2069) for Engineering Chemistry. Click any session paper to expand.

Showing 385 questions across 19 exam session papers

Institute of Engineering • 2083 Baishakh Board Examination

Q1[2 Marks]Electrochemistry and Buffer

Write the points of differences between electrolytic and galvanic cell. From the given information answer the following questions.

Ni \to Ni^{++} + 2 e^{-}

E^{0} = 0.24 V

[Ni^{++}] = 0.1 M

Cd \to Cd^{++} + 2 e^{-}

E^{0} = 0.40 V

[Cd^{++}] = 0.01 M

a) Identify anode and cathode while constructing the galvanic cell with reasons. b) Write the symbolic representation of the galvanic cell when above given electrodes are coupled. c) Calculate the emf of the galvanic cell thus constructed at

2 5^{\circ} C

Q2[2 Marks]Electrochemistry and Buffer

Explain, how the acidic buffer solution resists the change in pH on addition of small amount of acid or base. What is the pH of resulting mixture obtained by mixing 100 ml of

0.2 M HCl

and 50 ml of

0.5 M NH_{4} OH

solution. (

K_{b}

for ammonia =

1.8 \times 1 0^{- 5}

Q3[1 Marks]Electrochemistry and Buffer

Derive the Henderson’s equation for basic buffer. If

3.0

milli mole of

N a O H

is added to

100 ml

of a buffer which is

0.10 M

in acetic acid and

0.1 M

in sodium acetate, what will be the change in pH of solution? [pKa=4.74].

Q4[2 Marks]Catalyst and Catalysis

Define homogeneous and heterogeneous catalysis with examples. Discuss the selection criteria of a catalyst.

Q5[1 Marks]Catalyst and Catalysis

Define photocatalysis and electrocatalysis. Explain the photocatalytic process of water splitting.

Q6[1 Marks]Metal Complexes, Rare Earth Elements and Metal alloys

(a) What are the postulates of crystal field theory? Explain crystal field splitting of d-orbitals in

a^{n}

octahedral complex. [2+2] (b) Give

a^{n}

applications of aluminum alloy.

Q7[1 Marks]Metal Complexes, Rare Earth Elements and Metal alloys

What is chelate? Using VBT, predict the geometry and magnetic property of

[C o F_{4}]^{-}

. Write the formula of following co-ordination compounds.\n(i) Triamminetriaquachromium (III) chloride\n(ii) Potassium trioxalatoaluminate (III)

Q8[3 Marks]Metal Complexes, Rare Earth Elements and Metal alloys

On the basis of VBT, explain the structure and hybridization involved in

[N i (C O)_{4}]

. Write the IUPAC names of followings complexes.\n(i)

[C r (e n)_{3}] B r_{3}

\n(ii)

[C r (H_{2} O)_{5} C l] C l_{2}

\n(iii)

K_{3} [A l F_{6}]

\n(iv)

[C r (N H_{3})_{4} S O_{4}] N O_{3}

Q9[3 Marks]Metal Complexes, Rare Earth Elements and Metal alloys

Explain crystal field splitting of d orbitals in tetrahedral complex. Also describe the color formation process in complexes with

a^{n}

example.

Q10[3 Marks]Sustainable Chemistry

(a) What is BOD and COD and their consequences with reference to water pollution? Discuss the steps involved in the industrial treatment of wastewater. [3+2] (b) Describe your idea about the segregation and management of solid waste. Also, discuss the challenges to be faced during the process of waste to energy implementation.

Q11[2 Marks]Nanoscience and Nanotechnology

Classify nanomaterials based on their dimensions including examples. Explain Chemical Vapor Deposition (CVD) process in detail.

Q12[2 Marks]Nanoscience and Nanotechnology

Define nanofibers and Mxene. Discuss physical vapor deposition (PVD) method for preparation of nanomaterials.

Q13[1 Marks]Engineering Materials

(a) How does addition polymer differ from condensation polymer? Write down the mechanism of cationic polymerization reaction with a suitable example. [2+3] (b) What is carbon fiber? Write the preparation and uses of kevlor and polymethyl methacrylate (PMMA). \n**[OR]**\n Write short notes on: [2x2.5] (a) Chitin (b) Polythiazyl

Q14[1 Marks]Explosives, Lubricants and Paints

(a) What are plastic explosives? Write the preparation and application of nitroglycerine. [1+2] (b) What are the types and functions of lubricant?

Q15[3 Marks]Analytical Techniques and their Applications

Define chromatographic technique. Write the principle and application of thin layer chromatography. [1+2+2] \n**[OR]**\n Write down the principle of IR spectroscopy. Discuss the significance of functional group region and fingerprint region in IR spectrum.

Q16[2 Marks]Electrochemistry and Buffer

What is a galvanic cell? Draw a diagram of a Daniel cell. Calculate the emf of the following cell at

2 5^{\circ} C

. [1+1+3]

F e / F e^{++} (0.6 M) // S n^{++} (0.2 M) / S n

Given:

E_{F e^{++} / F e}^{\circ} = - 0.44 V

and

E_{S n^{++} / S n}^{\circ} = - 0.14 V

. \n**[OR]**\n Write down the Butler-Volmer equation and its uses. Explain the charging and discharging process in lead acid battery with suitable chemical reactions.

Q17[3 Marks]Analytical Techniques and their Applications

Write the principle of chromatography along with its applications. How is X-ray diffraction method useful in the analysis of crystalline structure? [3+2] \n**[OR]**\n Describe the principle of NMR spectroscopy. Draw and explain NMR spectrum of ethanol.

Q18[3 Marks]Sustainable Chemistry

(a) What is green chemistry? Explain two principles of green chemistry with suitable examples. Discuss COD and its consequences with reference to water pollution. [1+2+2] (b) Discuss the impacts of

S O_{x}

and

N O_{x}

on the environment and human health? How can we control emission containing

S O_{x}

Q19[2 Marks]Engineering Materials

(a) Define fiber reinforced polymer. Write the preparation and use of polycarbonate and epoxy resin. [1+2+2] (b) Differentiate between addition and condensation polymerization. Write the mechanism of anionic polymerization reaction with a suitable example. \n**[OR]**\n Write short notes on: [2x2.5]\n(i) Cellulose\n(ii) Polyphosphazene

Q20[1 Marks]Explosives, Lubricants and Paints

(a) What is primary explosive? Write the preparation and uses of TNT. [1+2] (b) Write the functions of lubricants. What are the requisite of paints?

Curriculum Syllabus & Course Topics

Sourced from TU curriculum portal

Full Syllabus (PDF)

Chapter-wise Units & Micro-Syllabus Topics (8 Units)

1. Electrochemistry and Buffer
- 1.1Electrochemistry
- 1.1.1Introduction
- 1.1.2EMF of galvanic cell, Nernst equation
- 1.1.3Polarization and overpotential
- 1.1.4Butler-Volmer equation and Tafel plots
- 1.2Electrode processes and mechanisms
- 1.2.1Charge transfer processes at electrodes
- 1.2.2Mass transfer and diffusion in electrochemical systems
- 1.3Industrial and applied electrochemistry
- 1.3.1Batteries: Lead acid and lithium ion
- 1.3.2Solar-photovoltaic cell, fuel cell
- 1.3.3Corrosion
- 1.4Buffer, buffer range, buffer capacity and buffer solution and its applications
2. Catalyst and Catalysis
- 2.1Definition and types
- 2.2Design and criteria
- 2.2.1Structure-activity relationships
- 2.2.2Selection criteria of catalyst
- 2.3Photocatalysis and electrocatalysis
- 2.4Catalysis for energy and environmental applications
- 2.4.1Catalytic conversion of fossil fuels
- 2.4.2Renewable energy catalysts
- 2.4.3Catalyst for pollution control
3. Analytical Techniques and their Applications
- 3.1Chromatography
- 3.2Mass spectroscopy
- 3.3X-ray diffraction (XRD)
- 3.4UV-visible spectroscopy
- 3.5Infrared-spectroscopy (IR)
- 3.6Nuclear magnetic resonance spectroscopy (NMR)
4. Metal Complexes, Rare Earth Elements and Metal alloys
- 4.1Complexes
- 4.1.1Introduction and Werner’s theory
- 4.1.2Geometry of complex by VBT and its applications
- 4.1.3Crystal field theory: Principle and applications
- 4.2Rare earth elements: Introduction and applications
- 4.3Metallic alloys and applications
5. Sustainable Chemistry
- 5.1Green chemistry: Introduction and principles
- 5.2Water chemistry
- 5.2.1Importance of water quality standards
- 5.2.2Degree of hardness, scale formation in boiler and softening of hard water
- 5.2.3Water pollution with reference to turbidity, COD, BOD, heavy metals, radioactive substances, and plastic
- 5.2.4Industrial wastewater and its treatment
- 5.3Air pollution
- 5.3.1Particulate matter, SOx, NOx, GHGs, VOCs, their impacts and remedies
- 5.4Waste management
- 5.4.1Segregation and management of solid waste
- 5.4.2Management of biodegradable waste into energy
- 5.4.3E-waste and its management
6. Nanoscience and Nanotechnology
- 6.1Introduction and types of nano materials (0-, 1-, 2-, and 3- dimensional)
- 6.2Nanoparticles, nanofibers, nanowires, carbon nanotubes, graphene, mxene, quantum dots, and their uses
- 6.3Preparation of nanomaterials
7. Engineering Materials
- 7.1Polymers
- 7.1.1Natural and synthetic, organic and inorganic, conducting and non- conducting
- 7.1.2Types of polymerizations: Addition and condensation polymerization
- 7.1.3Preparation and applications of epoxy resin, polyurethane, Kevlar, polycarbonate, polymethyl methacrylate, polyacrylonitrile, silicones; phosphorus based polymer, sulphur based polymer
- 7.1.4Conducting polymers: Synthesis and application
- 7.1.5Composite: Fiber reinforced polymer
- 7.1.6Natural polymers: Cellulose, chitin, chitosan, collagen
- 7.2Cement: Hydration and setting chemistry of cement
8. Explosives, Lubricants and Paints
- 8.1Explosives
- 8.1.1Types of explosives: Primary, low and high explosives
- 8.1.2Preparation and applications of TNT, TNG, Nitrocellulose and plastic explosives
- 8.2Lubricants: Introduction, function and classification
- 8.3Paints
- 8.3.1Introduction, requisites, types and applications
- 8.3.2Environmental and health impact

Examination Scheme & Marks Distribution

Evaluation Structure

Final Board Theory Exam: 60 Marks (Pass mark: 24)
Internal Assessment: 40 Marks (Pass mark: 16)
Practical / Lab Exam: 25 or 50 Marks (Continuous lab evaluation + viva, where applicable)

* This is the general current IOE 60/40 scheme; verify course-specific details in the syllabus above.

Exam Preparation Guidelines

Review the 3 available past examination papers to identify recurring patterns, core problem types, and chapter weightage.
Cross-reference key answers with official syllabus units, standard textbooks, and lecture notes.
Structure answers with labeled diagrams, concise bullet points, and highlight final answers in numerical solutions.

Authentic IOE Past Papers

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Curriculum Syllabus & Marking Scheme

Past Question Papers (PDF)

1st-sem_Engineering Chemistry.pdf

Most Frequently Asked Questions

Electrochemistry and Buffer

Catalyst and Catalysis

Metal Complexes, Rare Earth Elements and Metal alloys

Sustainable Chemistry

Engineering Materials

Explosives, Lubricants and Paints

Year-wise & Session-wise Exam Papers

Curriculum Syllabus & Course Topics

1. Electrochemistry and Buffer

2. Catalyst and Catalysis

3. Analytical Techniques and their Applications

4. Metal Complexes, Rare Earth Elements and Metal alloys

5. Sustainable Chemistry

6. Nanoscience and Nanotechnology

7. Engineering Materials

8. Explosives, Lubricants and Paints

Examination Scheme & Marks Distribution

Evaluation Structure

Exam Preparation Guidelines