Engineering Chemistry PYQ 2025-26 AKTU Question Paper

Engineering Chemistry AKTU syllabus

1. Unit 1: Atomic Structure, Advanced Materials and Green Chemistry
2. Unit 2: Spectroscopic Techniques and Stereochemistry
3. Unit 3: Electrochemistry, Batteries, Corrosion and Engineering Materials
4. Unit 4: Water Technology and Fuels
5. Unit 5: Polymers and Organometallic Compounds

Questions in Engineering Chemistry AKTU PYQ 2025-26

1. Q1a. What are nanomaterials? How are they different from bulk materials? (2 marks, 2025-26)
2. Q1a. On the basis of MO theory, calculate the bond order of NO. Will it be diamagnetic or paramagnetic—Explain. (2 marks, 2025-26)
3. Q1b. What is fullerene? Explain its structure and one important application. (2 marks, 2025-26)
4. Q1b. Predict the number of signals and their splitting patterns in ¹H NMR spectra of CH₃CCl₂CH₃ and CH₃OCH₂CH₃. (2 marks, 2025-26)
5. Q1c. What is Plaster of Paris (POP)? How is POP prepared from gypsum? (2 marks, 2025-26)
6. Q1c. What is electrochemical series? Give important applications of electrochemical series. (2 marks, 2025-26)
7. Q1d. A solution having concentration 5 × 10⁻⁴ mol L⁻¹ shows an absorbance of 0.75 in a cell of path length 1 cm. Calculate the molar absorptivity (ε). (2 marks, 2025-26)
8. Q1d. Why does soap not give lather with hard water? Write chemical reactions in support of your answer. (2 marks, 2025-26)
9. Q1e. Show with the help of reactions, how scale formation can be prevented by Calgon conditioning? (2 marks, 2025-26)
10. Q1e. State the differences between addition and condensation polymerization. (2 marks, 2025-26)
11. Q1f. When does Gross Calorific Value (GCV) equal Net Calorific Value (NCV)? (2 marks, 2025-26)
12. Q1f. Why lithium exists as diatomic but beryllium remains as monoatomic? (2 marks, 2025-26)
13. Q1g. What are polymer blends? Give one example. (2 marks, 2025-26)
14. Q1g. What is salt bridge? Mention its function in an electrochemical cell. (2 marks, 2025-26)
15. Q2a. What are Liquid Crystals? Describe the types of liquid crystals. Explain nematic, smectic, and cholesteric liquid crystals with suitable diagrams and examples. (7 marks, 2025-26)
16. Q2a. Discuss the principles of Green Chemistry. Explain the green synthesis of Paracetamol and mention the environmental benefits of Green Chemistry. (7 marks, 2025-26)
17. Q2b. Predict and analyze the ¹H NMR spectra of the following compounds: 1. CH₂Cl–CH₂Cl 2. CH₃CH₂OH Explain the number of signals, splitting patterns (multiplicity), and integration for each type of proton. (7 marks, 2025-26)
18. Q2b. What is the finger print region in IR spectroscopy? Write its applications. Two molecules (X and Y) both having molecular formula C₃H₆O give IR band at 3550 cm⁻¹ and 1717 cm⁻¹ respectively. Propose the structure of X and Y consistent with their IR bands. (7 marks, 2025-26)
19. Q2c. Describe the construction and working of a Galvanic Cell. Calculate the equilibrium constant (K) at 25°C for the reaction: Fe²⁺ + Ag⁺ → Fe³⁺ + Ag(s) Given: E°(Fe³⁺/Fe²⁺) = 0.78 V and E°(Ag⁺/Ag) = 0.85 V. (7 marks, 2025-26)
20. Q2c. Define corrosion. How corrosion can be minimized by sacrificial anodic protection and impressed current cathodic protection methods? (7 marks, 2025-26)
21. Q2d. Define the Higher Calorific Value (HCV) and Lower Calorific Value (LCV) of a fuel sample. In a bomb calorimeter experiment, the following data were obtained: Weight of coal = 0.896 g, Weight of water in calorimeter = 2590 g, Water equivalent of calorimeter = 3500 g, Rise in temperature of water =… (7 marks, 2025-26)
22. Q2d. What are resins? How hard water can be softened by ion exchange resins? Compare its merits and demerits over lime–soda process. (7 marks, 2025-26)
23. Q2e. Discuss conducting polymers and biodegradable polymers with respect to their preparation, properties, and applications. Evaluate their importance in modern industry and environmental sustainability. (7 marks, 2025-26)
24. Q2e. Give preparation, properties and applications of following polymer: (i) Buna-S (ii) Dacron (iii) Bakelite. (7 marks, 2025-26)
25. Q3a. Draw and explain the Molecular Orbital (MO) diagrams of N₂ and O₂ molecules. Calculate their bond order and predict their magnetic behaviour. (7 marks, 2025-26)
26. Q3a. What are nanomaterials? How the physical and chemical properties of nanoparticles vary with their size? Write important applications of nanomaterials. (7 marks, 2025-26)
27. Q3b. Compare the synthesis of Paracetamol by conventional and green chemistry routes. Which route is more environment-friendly and why? (7 marks, 2025-26)
28. Q3b. What do you understand by liquid crystalline state? Distinguish between nematic and smectic liquid crystals. Give their important applications. (7 marks, 2025-26)
29. Q4a. Explain the elementary idea of IR spectroscopy. Analyze how different functional groups are identified using IR spectra. Which of the following molecules will show IR absorption spectra and why? H₂, HCl, CO₂, H₂O, CH₄, N₂ (7 marks, 2025-26)
30. Q4a. Why TMS is used as an internal standard in NMR spectroscopy? Explain shielding effect in NMR spectroscopy. A compound having molecular formula C₄H₉Br give following signals in ¹H NMR spectra: δ 1.04 (6H, d) δ 1.95 (1H, m) δ 3.33 (2H, d) Assign the structure of the compound citing suitable reason. (7 marks, 2025-26)
31. Q4b. Analyze the basic principles of UV–Visible spectroscopy. Explain its simple applications in structural determination and quantitative analysis. Explain why 1,3-butadiene possesses a higher λmax value in UV–Visible spectroscopy compared to ethane. (7 marks, 2025-26)
32. Q4b. (i) Define chromophore. Identify the chromophoric groups present in cyclopentene, toluene, butanone and methanethiol. (ii) Discuss electronic transitions involved in UV-Visible spectroscopy and explain the effect of polar solvent on n–π* transition in acetone. (7 marks, 2025-26)
33. Q5a. With the help of a neat, well-labeled diagram, explain the of mechanism electrochemical (wet) corrosion of iron in: (i) neutral or alkaline medium (ii) acidic medium (7 marks, 2025-26)
34. Q5a. What is battery? Differentiate between primary and secondary batteries. Explain the construction and working of secondary battery by taking an account of lead storage battery. (7 marks, 2025-26)
35. Q5b. Explain the hardening and setting process of cement. Discuss the chemical reactions involved, difference between initial and final setting, and factors affecting setting time. (7 marks, 2025-26)
36. Q5b. What is the composition of cement? Illustrate the various steps involved during manufacturing of Portland cement with the help of a labeled diagram. (7 marks, 2025-26)
37. Q6a. Compare ion exchange process with the zeolite process for water softening. Discuss advantages, limitations, and industrial relevance of each method. (7 marks, 2025-26)
38. Q6a. Explain zeolite process of water softening. What are the advantages and limitations of this process? Calculate the amount of lime and soda required for the treatment of 10,000 litres of water whose analysis is as follows (in mg/L): Mg(HCO₃)₂ = 73; CaSO₄ = 102; MgCl₂ = 95; MgSO₄ = 24; Ca(HCO₃)₂ =… (7 marks, 2025-26)
39. Q6b. Write the different chemical reactions taking place in soda-lime process. A sample of water on analysis give following result: Analysis of Raw water: Ca²⁺ = 80 mg/l; Mg²⁺ = 24 mg/l, CO₂ = 33 mg/l, HCO⁻¹ = 132 mg/l, H⁺ = 10 mg/l & NaCl 4.3 ppm, OH⁻¹ = 34 mg/l. Calculate the Quantity of lime (74%… (7 marks, 2025-26)
40. Q6b. Explain ultimate and proximate analysis of coal. A sample of fuel having following percentage composition C = 70%, H = 6%, O = 4%, N = 3%, S = 3%, ash = 6% and moisture = 8%. Calculate the quantity of air required for complete combustion of 1 Kg of fuel. (7 marks, 2025-26)

Engineering Chemistry previous year papers

• PYQ 2024-25
• PYQ 2023-24
• PYQ 2022-23

More Engineering Chemistry resources

• Important Questions: Unit 1 Important Questions
• Important Questions: Unit 2 Important Questions
• Important Questions: Unit 3 Important Questions
• Important Questions: Unit 4 Important Questions
• Important Questions: Unit 5 Important Questions
• Important Questions: Important Questions (All Units)
• Notes: Unit 1 Notes
• Notes: Unit 2 Notes
• Notes: Unit 3 Notes
• Notes: Unit 4 Notes
• Notes: Unit 5 Notes

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• Engineering Chemistry PYQ 2025-26 Sem 2

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