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Previous Year Question Paper

BT-101 (GS) – Engineering Chemistry

June 2026•COMMON•SEMESTER-2

June 2026

Max Marks: 70

Duration: 3 Hours

Instructions:

• Attempt any five questions.

• All questions carry equal marks.

Q.1

i)Unit 1

What is meant by hardness? How will you determine hardness of water by EDTA method?

ii)Unit 1

50ml of hard water sample requires 35ml of 0.01 M EDTA for the titration. 50ml of the same water sample after boiling and filtering required 12ml of 0.01 M EDTA. Calculate the total, temporary hardness of the water.

Q.2

i)Unit 2

Criticize how caustic embrittlement can be prevented and define the same.

ii)Unit 2

How is hard water converted into soft water using ion exchange process?

Q.3

i)Unit 3

Good lubricant should have high flash and fire point. Give reason.

ii)Unit 3

What is lubrication? Give classification of lubricants. Discuss mechanism of lubrication.

Q.4

i)Unit 4

Illustrate free radical mechanism of polymer.

ii)Unit 4

Write elaborately about the applications of Biodegradable polymers.

Q.5

i)Unit 5

What is chemical corrosion? Explain the mechanism.

ii)Unit 5

Explain Phase, component and degree of freedom.

Q.6

Unit 6

Discuss about Ultra-violet spectroscopy with principle, instrumentation and applications.

Q.7

i)Unit 2

Write short notes on: Boiler corrosion

ii)Unit 4

Write short notes on: Classification of Polymer based on tacticity

Q.8

Unit 1, Unit 3, Unit 4, Unit 7

Write short notes on any two: (i) Units of Hardness of water (ii) Saponification Number (iii) Vulcanization of Rubber (iv) Electron affinity