Engineering Chemistry SPPU Endsem Question Paper Apr 2025
All 11 questions from this SPPU endsem paper, as printed. Read them here or open the PDF.
- Pattern
- 2024 pattern
- Exam
- Endsem
- Session
- Apr 2025
- Max. marks
- 70
- Time
- 2½ Hours
- Semester
- I
- Paper code
- [6401]-2403
Printed for: F.E.
Instructions to the candidates
- Q.1 is compulsory.
- Solve Q.No.2 or Q.No.3, Q.No.4 or Q.No.5, Q.No.6 or Q.No.7, Q.No.8 or Q.No.9, Q.No.10 or Q.No.11.
- 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
- [1]
Multiple Choice Questions : i) Temporary hardness is also known as _______.
Also asked:Apr 2025
- a)
Non Carbonate hardness b) Carbonate hardness
Also asked:Apr 2025
- c)[1]
Total hardness d) None alkaline hardness ii) EDTA method is used to determine hardness of water by _______ titration.
Also asked:Apr 2025
- a)
Precipitation b) Redox
- c)[1]
Acid base d) Complexometric iii) The rate in decrease of intensity of radiation is directly proportional the concentration of fixed path length of solution is the statement of _______.
Also asked:Apr 2025
- a)
Beer's Law b) Lamberts Law
Also asked:Apr 2025
- c)[1]
Beer-Lamberts Law d) None of these iv) When absorption maxima shifts towards longer wavelength, known as _________ shift.
Also asked:Apr 2025
- a)
Hypsochromic b) Hyperchromic
- c)[1]
Hypochromic d) Bathochromic v) Which among the following is an example of Quantum dots?
- a)
This part has equations that don’t show as text. Open the PDF to read it.
- c)[1]
This part has equations that don’t show as text. Open the PDF to read it.
- a)
Iodine vapours b) FeCl 2
Also asked:Apr 2025
- c)[1]
Lithium metal d) Sodium napthalide vii) Boys gas calorimeter is used for determination of GCV of ______.
Also asked:Apr 2025
- a)
Solid fuel b) Non volatile liquid
Also asked:Apr 2025
- c)[1]
Gaseous fuel d) None of above viii) Reaction taking place on the anodic areas is _______
Also asked:Apr 2025
- a)
Oxidation b) Reduction
- c)[1]
Neutralisation d) Addition ix) Kjeldahls method is used for determination of _________ from coal.
Also asked:Apr 2025
- a)
Hydrogen b) Nitrogen
- c)[1]
Sulphur d) Carbon x) Which of the film is protective?
Also asked:Apr 2025
- a)
Non porous b) Porous
- c)
Volatile d) None of the above
Also asked:Apr 2025
Q2
- a)[6]
Explain the causes of scales in boiler. Give two disadvantages and two methods of prevention.
- b)[3]
Define reverse Osmosis. Give its two advantages & two limitations.
Also asked:Apr 2025
- c)[3]
25 ml of hard water sample required 11.2 ml 0.01 MEDIA to reach the end point. 25 ml of the same water sample after boiling and filteration required 7.9 ml of the same EDTA to reach the end point. Calculate total, temporary and permanent hardness of water.
OR- a)
Q3
- a)[6]
Explain Zeolite process for softening of water with figure, process, ion exchange and regeneration reaction, two advantages.
- b)[3]
State the causes of foaming when it takes place in boiler and give remedial measures for its prevention.
Also asked:Apr 2025
- c)[3]
25 ml water sample requires 3.7ml of 0.01 NHCl up to phenolphthalein end point and 7.4 ml upto methyl arange end point during the titration. Calculate types and amount of alkalinity present in water.
Also asked:Apr 2025
- a)
Q4
- a)[6]
Explain pH metric titration curve between strong acid and strong base. Give the reaction, titration curve and calculations.
- b)[3]
Explain any three applications of UV-visible spectroscopy.
- c)[3]
Give the composition of the membrane of the ion selective electrode used to detect i) H+ ii) F – iii) Cl –
Also asked:Apr 2025
OR- a)
Q5
- a)[6]
Draw block diagram of Double beam UV-visible spectrophotometer. Explain its any four components and give their function.
- b)[3]
Give the construction with neat, labeled diagram and representation of calomel electrode.
Also asked:Apr 2025
- c)[3]
Define : i) Cell constant ii) Specific conductance iii) Equivalent conductance
Also asked:Nov 2025 ·Oct 2025 ·Apr 2025 ·Nov 2024 ·Oct 2024 ·Oct 2023
- a)
Q6
- a)[6]
What is conducting polymer? Give structural requirement for conducting polymer. Explain doping reactions and given two applications.
- b)[3]
What are quantum dots? Give any two types of quantum dots and it's two applications.
- c)[3]
What are carbon nanotubes? Give their types and two applications.
OR- a)
Q7
- a)[6]
Explain the structure of Graphene with diagram and mention it's four properties and two applications.
Also asked:Nov 2025 ·Nov 2025 ·May 2025 ·Apr 2025 ·Nov 2024 ·May 2024 ·Nov 2023
- b)[3]
Define Biodegradable polymer. Discuss any two factors responsible for biodegradation of polymer.
- c)[3]
Give the structure of polycarbonate. Mention its two properties and two applications.
Also asked:Nov 2025 ·Nov 2025 ·May 2025 ·Apr 2025 ·Nov 2024 ·May 2024 ·Nov 2023
- a)
Q8
- a)[6]
What is power alcohol? Give the procedure and reaction for preparation of ethanol. Give its two advantages and two disadvantages.
- b)[3]
Give any three characteristics of an ideal fuel.
Also asked:Apr 2025
- c)[3]
1.2 gm of coal sample was heated in silica crucible in an electric oven at 110°C for 1 hr. The residue weighed 1.16 gm. The crucible was ignited to a constant weight of 0.09 gm. In another experiment 1.2 gm of sample was heated in a silica crucible covered with vented lid of 950°C for 7 min. After cooling the residue weighted 0.80 gm. Calculate % m, % VM and % Ash content.
Also asked:Apr 2025
OR- a)
Q9
- a)[6]
Describe the construction and working of Bomb calorimeter with diagram for determination of GCV of fuel. State the formula to calculate GCV.
- b)[3]
Explain the production of hydrogen by steam reforming of hydrocarbon (methane) with reaction conditions.
Also asked:Nov 2025 ·Nov 2025 ·Apr 2025 ·Nov 2024 ·May 2024 ·Nov 2023
- c)[3]
This part has equations that don’t show as text. Open the PDF to read it.
- a)
Q10
- a)[6]
Explain the mechanism of Dry corrosion with figure give the reaction and types of oxide film formed in Mg, Cr.
- b)[3]
i) Define Electroplating. Give its two application and two disadvantages. ii) Explain the cathodic protection by sacrificial anode for corrosion control and prevention. [3]
Also asked:Apr 2025
OR- a)
Q11
- a)[6]
Define wet corrosion. Give conditions for wet corrosion. Explain hydrogen evolution mechanism of wet corrosion with suitable example.
Also asked:Nov 2025 ·Nov 2025 ·May 2025 ·Apr 2025 ·Nov 2024 ·May 2024 ·Nov 2023
- b)[3]
i) Discuss any three factors affecting rate of corrosion. ii) What are anodic and cathodic coatings? Which is more protective? [3]
Also asked:Apr 2025
- a)