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HBTU KANPUR · PYQ LIBRARY

Engineering Chemistry PYQs

88 previous-year questions for Engineering Chemistry. Use Practice Mode to filter by unit, topic, academic year or examination and open the available solutions.

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Sample previous-year questions

2026-27 · mid sem · 4 marks

Chemical Bonding, Spectroscopy, and Solid-State Chemistry

(a) Explain the basic concept and working principle of UV-Visible spectroscopy. Discuss the electronic transitions responsible for absorption in the UV-Visible. (b) Describe different types of transition states and role of electromagnetic radiation in Molecular Spectroscopy.
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2026-27 · mid sem · 7 marks

Stereochemistry and Organic Reaction Mechanisms

(a) What are chiral and achiral molecules? Differentiate between them with suitable examples. (b) Define enantiomers with a suitable example. Discuss their physical and chemical properties. (c) What is optical activity? Draw a schematic diagram of polarimeter.
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2026-27 · mid sem · 2 marks

Polymers, Water Analysis, and Solid Waste Management

(a) What is hardness of water? Explain. (b) Why do we express harness in terms of CaCO3\text{CaCO}_3 equivalents?
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2025-2026 · end sem · 8 marks

Electrochemistry, Nanochemistry, and Environmental Chemistry

(a) Explain construction and working of H2−O2\text{H}_2-\text{O}_2 fuel cell. (b) What is the difference between the top down and bottom up approach of synthesis of nanomaterial? Write classification of nanomaterials. (c) What is electromotive force (emf) of the cell? For the cell: Cr(s)∣Cr3+(aq)(0.1M)∥Fe(aq)2+(0.01M)∣Fe(aq)\text{Cr}_{(s)}|\text{Cr}^3+_{(aq)}(0.1\text{M}) \parallel \text{Fe}^{2+}_{(aq)}(0.01\text{M})|\text{Fe}_{(aq)} Given: E0(Cr3+∣Cr)=−0.74 VE^0(\text{Cr}^{3+}|\text{Cr}) = -0.74\text{ V} and E0(Fe2+∣Fe)=−0.44 VE^0(\text{Fe}^{2+}|\text{Fe}) = -0.44\text{ V} Write the cell reaction and calculate the emf of the cell at 25 ∘C25\text{ }^{\circ}\text{C}.
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2025-26 · mid sem · 4 marks

Chemical Bonding, Spectroscopy, and Solid-State Chemistry

(a) Draw the energy level diagram of different transition States and explain. (b) What is the working principle of UV-Vis. Spectroscopy? Illustrate and explain the double beam UV-Vis. Spectrophotometer.
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2025-26 · mid sem · 3 marks

Chemical Kinetics and Surface Chemistry

(a) Explain the differential rate expression method to determine the order of reaction (n). (b) In a second order reaction the initial concentration of the reactant is 0.2 moles/L0.2 \text{ moles/L}. The reaction is found to be 30%30\% complete in 50 min50\text{ min}. Calculate the value of rate constant.
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2025-26 · mid sem · 5 marks

Stereochemistry and Organic Reaction Mechanisms

(a) Differentiate between enantiomers and diastereomers with suitable examples. (b) Define optical activity. Explain the principle of optical activity with the help of a schematic diagram of a polarimeter.
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