Engineering Chemistry SPPU Endsem Question Paper May 2025
All 9 questions from this SPPU endsem paper, as printed. Read them here or open the PDF.
- Subject code
- 107009
- Pattern
- 2019 pattern
- Exam
- Endsem
- Session
- May 2025
- Max. marks
- 70
- Time
- 2½ Hours
- Semester
- I/II
- Paper code
- [6401]-1904
Printed for: F.E.
Instructions to the candidates
- Q.1 is compulsory.
- Attempt 2 or 3, 4 or 5 6 or 7 & 8 or 9.
- Neat diagrams must be drawn wherever necessary.
- Figures to the right indicate full marks.
- Use of logarithmic tables slide rule, mollier charts, electronic pocket calculator and steam tables is allowed.
- Assume suitable data, if necessary.
Questions
Q1
- [10]
Multiple choice questions:
- a)
Poly Phenylene Vinylene (PPV) shows the property of. i) Bioluminescence ii) Luminescence iii) Chemiluminescence iv) Electroluminescence
- b)
This part has equations that don’t show as text. Open the PDF to read it.
- c)
This part has equations that don’t show as text. Open the PDF to read it.
- d)
This part has equations that don’t show as text. Open the PDF to read it.
- e)
The relation between Gross and Net calorific value is i) GCV = NCV ii) GCV > NCV iii) GCV < NCV iv) None of these
- f)
The detector used in UV-Visible spectrophotometer is i) Phototube ii) Photomultiplier tube iii) Photovoltaic cell iv) All of these 2
- g)
If absorption of molecule is shifted to wards longer wave length due to solvent effect is called as i) Hypsochromic shift ii) Hypochromic shift iii) Bathochromic shift iv) Hyperchromic shift
- h)
Bending vibrations are characterised by i) Change in bond angle between two covalent bonds ii) Change in bond lenght between two covalent bonds iii) Change in geometry of molecule iv) No any change i) Galvanising is coating of i) Fe on Sn ii) Zn on Fe iii) Sn on Fe iv) Fe on Zn j) Which type of reaction occur in anodic areas i) Oxidation ii) Reduction iii) Displacement iv) Addition
Q2
- a)[6]
What are Biodegradable polymers? Give the structure of PHBV. Explain three factors responsible for biodegradation. Give its any two applications.
- b)[5]
What are carbon nanotubes? Discuss the different types of carbon nanotubes with respect to their structure. Give any two applications.
- c)[4]
Give the structure, any two properties and two applications of polycarbonate.
Also asked:Nov 2025 ·Nov 2025 ·Apr 2025 ·Apr 2025 ·Nov 2024 ·May 2024 ·Nov 2023
OR- a)
Q3
- a)[6]
Explain the structure of Graphene with the help of diagram and mention three properties and three applications.
Also asked:Nov 2025 ·Nov 2025 ·Apr 2025 ·Apr 2025 ·Nov 2024 ·May 2024 ·Nov 2023
- b)[5]
Define polymer composites. What is the role of matrix phase and disperse phase in composites. Give any two advantages.
- c)[4]
What are nanomaterials. Classify any three on the basis of dimensions. 3
- a)
Q4
- a)[6]
Give construction with figure, working and give corrected formula for finding gross calorific value of a solid fuel by Bomb calorimeter.
- b)[5]
Give the preparation on reaction of Biodiesel. State three advantages of biodiesel.
- c)[4]
1.5 gm of coal sample in kjeldhal’s experiment, librated ammonia which was absorbed in 25/ml 0.1N H 2 SO 4 . The resultant solution required 14ml of 0.1N NaOH for complete neutralisation of H 2 SO 4 . In back titration. The reading of blank titration was 25ml. Find the percent of nitrogen in coal.
OR- a)
Q5
- a)[6]
Explain in brief the process with diagram for distillation of crude petroleum. Give composition, boiling range and uses of any two fractions obtained.
- b)[5]
What is Power alcohol? Give any three merits and three demerits of power alcohol.
- c)[4]
The following data was obtained in Boy’s Jas calorimeter experiment. i) Volume of gas burat at STP = 0.12m 3 ii) Mass of cooling water = 32kg iii) Rise in temperature of water = 7.8ºC iv) Mass of steam condensed = 0.09kg Calculate GCV and NCV of the fuel
- a)
Q6
- a)[6]
Draw the block diagram of IR spectrophotometer. Explain its four components and give their function.
Also asked:Nov 2023
- b)[5]
Explain the possible electronic transitions that occure in the molecule after absorption of UV radiations with suitable examples and labelled diagram.
- c)[4]
Explain any four applications of UV-Visible spectroscopy.
OR- a)
Q7
- a)[4]
i) State and give mathematical expression of Beers and Lambert’s law of absorption. ii) Define- [2] 1) Auxochrome 2) Hypsochromic shift
- b)[5]
What are the conditions of IR radiations by the molecule? Explain the fundamental modes of streching vibrations.
Also asked:Nov 2023
- c)[4]
This part has equations that don’t show as text. Open the PDF to read it.
- a)
Q8
- a)[6]
State Pilling Bedworth ratio and give its significance. Give the different types of oxide films with suitable example formed during the oxidation corrosion of metals.
- b)[5]
What is principle of cathodic protection? Explain the method involved using sacrificial anode and give its two applications.
Also asked:May 2024
- c)[4]
What are anodic and cathodic coatings? Which one is more protective and why?
OR- a)
Q9
- a)[6]
Explain the mechanism of wet corrosion by hydrogen evolution and oxygen absorption with diagram and reactions.
Also asked:Nov 2025 ·Nov 2025 ·Apr 2025 ·Apr 2025 ·Nov 2024 ·May 2024 ·Nov 2023
- b)[5]
Explain any five factors affecting the rate of corrosion related to metal.
- c)[4]
Define electroplating. Give the electroplating reactions with respect to the metals like Ag, Ni and Cr.
- a)