University of Mumbai first-year engineering Semester I Applied Chemistry paper, June 2025 (KT), NEP 2020 scheme, with step-by-step solutions written with AI help and checked.
Mumbai University FE Sem 1 Applied Chemistry (BSC103) Question Paper June 2025 (KT)
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) What are advantages of gaseous fuels over solid and liquid fuels?
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Q.1 (b) Distinguish between galvanizing and tinning.
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Q.1 (c) Why are alloys preferred over pure metals in many applications?
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Q.1 (d) Explain viscoelasticity property of polymer.
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Q.1 (e) Define Matrix phase and dispersed phase of composites.
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Q.1 (f) What is supercritical CO2 and how does it differ from liquid and gaseous CO2.
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Q.1 (g) 1 gm. of coal sample was used for determination of nitrogen. The ammonia evolved was passed into 50ml of 0.1 N H2SO4, the excess acid required 42 ml. of 0.1N NaOH for neutralization Calculate % of N.
Q.2
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Q.2 (a) How do following factors affects the rate of corrosion i) PH medium ii) Purity of metal iii) Area of anode and cathode.
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Q.2 (b) Explain the determination of sulphur present in coal sample and write its significance.
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Q.2 (c) Write an informative note on biodiesel.
Q.3
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Q.3 (a) In a polymer sample 30% molecules have a molecular mass 20,000, 40% have molecular mass 30,000 and the 30% have 60,000. Calculate the weight average, number average molecular weight and polydispersity of polymer sample.
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Q.3 (b) What is condensed phase rule equation? Write merits and limitation of phase rule.
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Q.3 (c) Write a short note on sandwich panel of structural composite write its applications.
Q.4
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Q.4 (a) Give the definitions and significance of following properties of polymer. Tensile strength, insulation resistance and refractive index.
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Q.4 (b) Explain synthesis of Adipic acid by traditional and green pathway. Also write the principle of green chemistry involved in this reaction.
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Q.4 (c) A sample of coal has the following composition C = 84 %, O = 8.4 %, H = 5.5 %, S = 1.5%, N = 0.6 %, Calculate the higher and lower calorific values of coal.
Q.5
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Q.5 (a) How material selection and proper design of equipments can prevent corrosion. Explain with the help of diagram and designing principles.
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Q.5 (b) Explain fiber reinforced composite and write its applications and limitations.
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Q.5 (c) An alloy of Cd and Bi contain 25% of Cd Find the mass of eutectic in 1kg of solid Alloy, if the eutectic contains 40 % of Cd.