B.Tech I Year II Semester (R20) Regular Examinations

Subject: Engineering Chemistry (20EEC23)

Time: 3 hours

Max. Marks: 70

Note: 1. Question paper consists of two parts, Part A and Part B.
2. Part A is for 20 marks, Part B is for 50 marks.

PART – A (10 x 2 = 20 Marks)

Answer all the questions from Part A

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1. a) Define single electrode potential.
2. b) Write the applications of conducting polymers.
3. c) What is meant by hardness of water?
4. d) Define the term 'cementation'.
5. e) State the significance of Gibb's phase rule.

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6. f) Define 'fuel cell'.
7. g) Define 'calorific value' of a fuel.
8. h) Write the composition of Portland cement.
9. i) Define 'phase' with an example.
10. j) Write any two applications of fullerenes.

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PART – B (5 x 10 = 50 Marks)

Answer all the questions from Part B

1. a) Describe the construction and working of calomel electrode with a neat diagram.
   (OR)
   b) Explain the synthesis and applications of conducting polymers.
2. a) Describe the EDTA method for the determination of hardness of water.
   

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   (OR)
   b) Explain the methods of sterilization of water for domestic purpose.
3. a) Explain the classification of alloys with suitable examples.
   (OR)
   b) Explain the composition, properties and applications of (i) brass (ii) bronze.

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4. a) What is meant by phase diagram? Explain the phase diagram of water system.
   (OR)
   b) Describe the construction and working of methanol-oxygen fuel cell with a neat diagram.
5. a) Define cracking. Explain different types of cracking with their advantages.
   (OR)
   

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   b) Describe the manufacture of Portland cement by wet process.

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