University of Mumbai first-year engineering Semester I Applied Chemistry paper, December 2025, NEP 2020 scheme, with step-by-step solutions written with AI help and checked.
Mumbai University FE Sem 1 Applied Chemistry (BSC103) Question Paper December 2025
Written semester papers (NEP 2020 scheme): 60 marks and 2 hours for most first-year courses. Question 1 is compulsory, then any three of questions 2 to 6.
Sections
| Q.1 Attempt any five (compulsory) | 7 questions | |
| Q.2 | 3 questions | |
| Q.3 | 3 questions | |
| Q.4 | 3 questions | |
| Q.5 | 3 questions |
Chapters covered
Instructions
Solve on paper with a timer, then check against the solutions.
Q.1 Attempt any five (compulsory)
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Q.1 (a) Define calorific value and write the significance of proximate analysis of coal.
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Q.1 (b) Explain the sacrificial anode cathodic protection method with a neat and well-labelled diagram.
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Q.1 (c) Explain the terms involved in Gibbs phase rule with an example of a one-component system. (Phase, Component and Degree of Freedom)
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Q.1 (d) Define the tensile strength of a polymer and explain its significance.
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Q.1 (e) Discuss applications of composites.
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Q.1 (f) Discuss super critical solvents with its applications.
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Q.1 (g) How is the percentage of sulphur determined in a solid fuel?
Q.2
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Q.2 (A) How can material selection and design prevent corrosion? Explain which protective coatings can be used for corrosion prevention.
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Q.2 (b) Calculate the gross and net calorific value of coal having the following compositions. Carbon=85%, hydrogen=8%, sulphur=1%, nitrogen=2%, ash=4%, and the latent heat of steam is 587 cal/gm.
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Q.2 (c) Write the conventional and green methods for the synthesis of adipic acid.
Q.3
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Q.3 (a) Explain all types of chemical bonds existing in polymers.
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Q.3 (b) Write notes on (a) reduced phase rule (c) applications of phase diagram.
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Q.3 (c) Classify composites with the help of a diagram and an example of each class.
Q.4
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Q.4 (a) Write short notes on crystallinity, number average molecular weight and fatigue of polymers.
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Q.4 (b) Write about the synthesis and advantages of biodiesel.
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Q.4 (c) 1.0 g of coal sample was digested (Kjeldahl method). The liberated ammonia was absorbed in 25 ml of N/10 H2SO4. To neutralise excess acid, 15 ml of 0.1 N NaOH was required. Determine the % nitrogen in the given sample of coal.
Q.5
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Q.5 (a) Explain the rusting of iron with the help of the electrochemical theory of corrosion and a diagram.
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Q.5 (b) Define matrix and dispersed phase with its functions and examples.
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Q.5 (c) An alloy of Cd and Bi contains 25% Cd. Find the mass of eutectic in 1 kg of alloy if the system contains 40% Cd.