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InsemOct 20252019 patternFE

Engineering Chemistry SPPU Insem Question Paper Oct 2025

All 4 questions from this SPPU insem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated Engineering Chemistry questions
Subject code
107009
Pattern
2019 pattern
Exam
Insem
Session
Oct 2025
Max. marks
30
Time
1 Hour
Semester
I
Paper code
[6577]-3

Printed for: F.E. (Insem.)

Instructions to the candidates

  1. Attempt Q.1 or Q.2 and Q.3 or Q.4.
  2. Figures to the right indicate full marks.
  3. Neat diagrams must be drawn wherever necessary.
  4. Use of logarithmic tables slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed.
  5. Assume suitable data, if necessary.

Questions

  1. Q1

    1. a)

      Draw block diagram of Deionisation method. Give ion exchange and regeneration reactions of any one hardness causing salt.

      [5]
    2. b)

      Explain causes, any two disadvantages and any two preventive measures of caustic embrittlement.

      [4]
    3. c)

      Define the following : i) Sludge ii) Temporary hardness iii) Electrodialysis

      [3]
    4. d)

      The hardness of 50,000 liters of a water sample was removed by passing it through a zeolite softener. The softener then required 200 liters of NaCl solution containing 125 gm/lit of NaCl for regeneration. Calculate the hardness of water sample.

      Also asked:Nov 2025 ·Nov 2024

      [3]

  2. Q2

    1. a)

      Define scale. Give any four causes of scale formation in boiler.

      Also asked:Nov 2025 ·Nov 2024 ·Mar 2024

      [5]
    2. b)

      What is Reverse Osmosis? Describe the process with neat labelled diagram.

      Also asked:Oct 2024

      [4]
    3. c)

      50 ml of water sample requires 15 ml of 0.02 M EDTA during titration where as, 50 ml of boiled water sample requires 11 ml of same EDTA in the titration. Calculate total, permanent & temporary hardness of water.

      Also asked:Oct 2024 ·Oct 2023

      [3]
    4. d)

      Water is not alkaline to phenolphthalein. However, 100 ml of water sample on titration with N/50 H 2 SO 4 required 16.5 ml for methyl orange end point. Determine the type and amount of alkalinity present in water. 2

      [3]

  3. Q3

    1. a)

      Explain three stages of pH metry titration between HCl and NaOH with titration curve and reactions.

      [5]
    2. b)

      Give the construction of glass electrode with labelled diagram, its representation and applications.

      Also asked:Mar 2024 ·Oct 2023

      [4]
    3. c)

      What are the types of buffer solutions? Give example of each type.

      Also asked:Oct 2024 ·Oct 2023

      [3]
    4. d)

      Define the following terms : i) Cell constant ii) Molar conductance iii) Equivalent conductance

      Also asked:Nov 2025 ·Apr 2025 ·Apr 2025 ·Nov 2024 ·Oct 2024 ·Oct 2023

      [3]

  4. Q4

    1. a)

      What is Ion selective Electrode. Give the composition and working of enzyme based membrane for urea determination with diagram.

      Also asked:Oct 2024

      [5]
    2. b)

      What is reference electrode? Explain the construction of calomel electrode with labelled diagram and its representation.

      Also asked:Oct 2023

      [4]
    3. c)

      Explain the construction of a conductivity cell with labelled diagram.

      Also asked:Mar 2024

      [3]
    4. d)

      This part has equations that don’t show as text. Open the PDF to read it.

      [3]