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Gujarat Technological UniversityWinter 2025 Examination

GTU 3110001 Chemistry Winter 2025 Paper Solution & PDF

B.E. · Common Engineering · Semester 1 · Subject Code: 3110001
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Total Marks70 MarksExternal theory exam
Passing Marks23 Marks33% minimum cutoff
Exam Duration2.5 Hours2:30 PM – 5:00 PM
Paper Structure5 QuestionsWith internal OR choices
Jump toQ1Q2Q3Q4Q5

Question 1

14 MarksMedium
(a)
Write characteristics of good fuel.
3 Marks
(b)
Why Vulcanized rubber is more stable and stronger compared to natural rubber?
4 Marks
(c)

Explain the suitable method to analyze the percentage of moisture, volatile matter and ash content in a coal sample.

7 Marks

Question 2

14 MarksMedium
(a)
What do you understand by temporary and permanent hardness of water?
3 Marks
(b)
Give the reaction for synthesis and uses of polymer nylon-6,6 and PVC.
4 Marks
(c)
What is corrosion? Explain electrochemical corrosion in detail.
7 Marks
OR OPTION
(c)

What are alloys? Why alloys are better than pure metal for making of various tools? Justify your answer with the help of examples.

7 Marks

Question 3

14 MarksMedium
(a)
Define Electron negativity, Ionization enthalpy and Electron affinity.
3 Marks
(b)

Give labeled schematic diagram for refining of petroleum by fractional distillation.

4 Marks
(c)
Define chemical bond. Explain various types of Bonds with suitable example.
7 Marks
OR OPTION
(a)
Distinguish between scale and sludge.
3 Marks
(b)
Explain Top down and Bottom up approaches for the synthesis of nanomaterial.
4 Marks
(c)

What is nanomaterial? Write applications of nanomaterial in textile industries, catalysis and medicine.

7 Marks

Question 4

14 MarksMedium
(a)

Write a specific applications of following polymers-

aPolyvinyl styrene b. Bakelite c. High density polyethene
3 Marks
(b)
Discuss any two boiler Problems in detail.
4 Marks
(c)
Explain the fermentation processes for preparation of Alcohol.
7 Marks
OR OPTION
(a)
What are fullerenes? Write properties of fullerenes in short.
3 Marks
(b)

What is pH? Draw a graph of pH metric titration of strong acid Vs. strong base and justify it.

4 Marks
(c)
Explain Zeolite method for the softening of water with neat and clean diagram.
7 Marks

Question 5

14 MarksMedium
(a)
What are enzymes? Write four characteristics of enzymes.
3 Marks
(b)
Explain Electro dialysis method for desalination of brackish water.
4 Marks
(c)

Draw a schematic diagram of UV spectrophotometer. Write principle and applications of UV-Visible Spectroscopy.

7 Marks
OR OPTION
(a)
Explain the terms : Octane and Cetane numbers
3 Marks
(b)
Give any two methods of removal of micro organisms from water.
4 Marks
(c)

Draw a schematic diagram of IR spectrophotometer. Write principle and applications of IR Spectroscopy.

7 Marks
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About this Examination Paper & Attribution

Official Gujarat Technological University (GTU) examination paper and step-by-step solutions for Chemistry (Winter 2025, B.E. · Common Engineering, Sem 1). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.

Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.

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