Question Bank – CHE102 Engineering Chemistry (Theory)

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Welcome, ! Access the question bank below. Questions are organized by exam type and module.

📘 Module I – Indian Knowledge System

1Describe the contributions of Nagarjuna to the field of chemistry. How did his work influence metallurgy and medicine? 5 marks

CO-1 · AT2-2

2What is Rasa Shastra? Explain the chemical processes described in ancient Indian texts for the purification of metals. 5 marks

CO-1 · AT2-2

3Discuss the role of Charak Sanhita in establishing the principles of medicinal chemistry and pharmacology in ancient India. 5 marks

CO-1 · AT2-2

💧 Module II – Water Chemistry

4Define hardness of water. Distinguish between temporary and permanent hardness with suitable chemical equations. Describe the EDTA method for determination of total hardness. 10 marks

CO-2 · AT2-2

5Explain the Lime–Soda process of water softening with relevant chemical reactions. What are its advantages and limitations? 8 marks

CO-2 · AT2-2

6What is caustic embrittlement? How does it occur in boilers and how can it be prevented? 5 marks

CO-2 · AT2-2

7A water sample contains: Ca²⁺ = 80 mg/L, Mg²⁺ = 36 mg/L, HCO₃⁻ = 200 mg/L, SO₄²⁻ = 96 mg/L. Calculate the total hardness in ppm as CaCO₃. 8 marks

CO-2 · AT2-2 (Numerical)

🌱 Module III – Advanced Materials

8State and explain any six principles of green chemistry. How does green chemistry contribute to sustainable development? 8 marks

CO-3 · AT2-2

9Classify liquid crystals and explain the structure and properties of thermotropic liquid crystals. Give two industrial applications. 8 marks

CO-3 · AT2-2

10Write a note on Carbon Nanotubes (CNT): structure (SWCNT and MWCNT), preparation by CVD method, and applications in engineering. 8 marks

CO-3 · AT2-2

🧬 Module IV – Polymer Chemistry (Long Questions)

1Classify polymers on the basis of (a) origin, (b) structure, (c) thermal behaviour, and (d) polymerization mechanism. Give one example of each type. 10 marks

CO-4 · AT2-3

2Describe the synthesis, properties, and industrial applications of: (a) Nylon 6,6 (b) Bakelite (c) Teflon. Compare their thermal stability and chemical resistance. 12 marks

CO-4 · AT2-3

3What are conducting polymers? Explain the doping mechanism with reference to polyacetylene. List two important conducting polymers and their applications in electronics. 8 marks

CO-4 · AT2-3

4Discuss biodegradable polymers: (a) definition and need; (b) classification; (c) Poly(lactic acid) – synthesis and applications; (d) environmental significance. 10 marks

CO-4 · AT2-3

🔬 Module V – Organic Chemistry & Spectroscopy (Long Questions)

5Explain optical isomerism with suitable examples. Define: chirality, enantiomers, diastereomers, meso compounds. Use R/S nomenclature to assign configuration to 2-bromobutane. 12 marks

CO-5 · AT2-3

6Explain the principle and instrumentation of IR spectroscopy. Discuss the characteristic absorption frequencies of the following functional groups: –OH, C=O, –NH₂, –C≡N, and aromatic ring. 12 marks

CO-5 · AT2-3

7Describe the principle of NMR spectroscopy. Explain chemical shift and spin-spin coupling with examples. How is ¹H NMR used in structure elucidation? 12 marks

CO-5 · AT2-3

8(Numerical) A solution of compound X (MW = 250 g/mol) shows absorbance A = 0.60 at λ_max = 300 nm in a 1 cm cell. Given ε = 12,000 L·mol⁻¹·cm⁻¹, calculate: (a) concentration of X, (b) % transmittance. 8 marks

CO-5 · AT2-3 (Numerical)

⚡ Module VI – Energy Materials (Long Questions)

9Define calorific value. Distinguish between GCV and NCV. Describe the determination of calorific value using Bomb Calorimeter with a neat labelled diagram. 12 marks

CO-6 · AT2-3

10(Numerical) Calculate the GCV and NCV of a fuel with composition: C = 82%, H = 10%, O = 4%, S = 2%, Ash = 2%. (Use Dulong's formula). 8 marks

CO-6 · AT2-3 (Numerical)

11Explain the chemistry of biogas production from organic waste. Describe the four stages of anaerobic digestion, composition of biogas, and its advantages over conventional fuels. 10 marks

CO-6 · AT2-3

✏️ Short Answer Questions (2 Marks each)

1Name two ancient Indian chemists and their major contributions.

CO-1

2What is the difference between temporary and permanent hardness of water?

CO-2

3What is calgon treatment? Write the chemical formula of calgon.

CO-2

4Define ion exchange resin. Give one example of a cation exchange resin.

CO-2

5State the atom economy principle of green chemistry with an example.

CO-3

6What is a liquid crystal? Name two types of liquid crystals.

CO-3

7What is the difference between C₆₀ fullerene (Buckminsterfullerene) and graphite in terms of structure?

CO-3

8Differentiate between addition and condensation polymerization with one example each.

CO-4

9What are polymer composites? Give one engineering application.

CO-4

10Define chirality. Give one example of a chiral molecule.

CO-5

11State Beer-Lambert's law and write its mathematical expression.

CO-5

12What is geometrical isomerism? Give cis and trans structures of 2-butene.

CO-5

13Define calorific value. Distinguish between GCV and NCV.

CO-6

14Name the four stages of anaerobic digestion in biogas production.

CO-6

15What is Dulong's formula for calculating calorific value? Write the equation.

CO-6

🎤 Viva & Quiz Questions

1Who was Nagarjuna and what is his significance in the history of chemistry?

CO-1 · Module I

2Why does hard water not form lather with soap? Write the reaction involved.

CO-2 · Module II

3What is a zeolite? What is the chemical name of permutite used in water softening?

CO-2 · Module II

4What is the unit of hardness? Convert 250 ppm CaCO₃ equivalents to °F.

CO-2 · Module II (Numerical)

5Name the 12 principles of green chemistry (just names, not detailed explanation).

CO-3 · Module III

6What are quantum dots? How do they differ from bulk semiconductor materials?

CO-3 · Module III

7What is Kevlar? Why is it stronger than steel on a weight-for-weight basis?

CO-4 · Module IV

8Buna-S and Buna-N are both synthetic rubbers. What is the key difference in their composition and use?

CO-4 · Module IV

9What is the fingerprint region in an IR spectrum and why is it important?

CO-5 · Module V

10Define chemical shift (δ) in NMR. What is TMS and why is it used as a reference?

CO-5 · Module V

11What is the difference between a chiral centre and a stereocentre?

CO-5 · Module V

12What type of fuel gives a higher calorific value – one with high carbon content or high hydrogen content? Justify.

CO-6 · Module VI

13What is the typical composition of biogas produced from cattle dung? What is its calorific value?

CO-6 · Module VI

14Why is oxygen already present in a fuel subtracted in Dulong's formula for calorific value calculation?

CO-6 · Module VI (Numerical reasoning)

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