Download JNTUA B.Tech 1-1 R15 2016 Dec Regular 15A51101 Engineering Chemistry Question Paper

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Code: 15A51101

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B.Tech I Year I Semester (R15) Regular & Supplementary Examinations December 2016

Time: 3 hours

ENGINEERING CHEMISTRY

(Common to ECE, ME, EIE and IT)

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PART - A

(Compulsory Question)

Answer the following: (10 X 02 = 20 Marks)

1. Write any two disadvantages of hard water.
2. Define caustic embrittlement.

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3. Write any two engineering applications of Buna-S.
4. Write short note on silicones.
5. What is galvanic corrosion?
6. Give examples for cathodic and anodic inhibitors.
7. Write any two characteristics of fuel.

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8. What is cetane number?
9. Write any two applications of acidic refractory material.
10. Write short note on fullerenes.

Max. Marks: 70

PART - B

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(Answer all five units, 5 X 10 = 50 Marks)

UNIT - I

1. (a) What is breakpoint chlorination? Explain its significance.
   (b) Explain desalination of brackish water by electrodialysis method.
   OR
   

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   3 (a) Explain zeolite method for the treatment of water.
   (b) Explain any three boiler troubles.

UNIT - II

4. (a) Differentiate between thermosetting and thermoplastic resins.
   (b) Explain the synthesis and applications of polyacetylene.
   

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   OR
   5 (a) Explain cationic mechanism.
   (b) What are inorganic polymers? Write their applications.

UNIT - III

6. (a) Derive Nernst equation.
   

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   (b) Explain electrochemical theory of corrosion.
   OR
   7 (a) What are the factors affecting corrosion based on nature of metal?
   (b) Explain in detail about cathodic protection.

UNIT - IV

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8. Write the manufacture of metallurgical coke by Otto Hoffmann's by product oven method and write advantages and disadvantages of power alcohol.
   OR
   9 What is octane number? Explain the refining of petroleum.

UNIT - V

10. Write the composition of cement and explain setting and hardening of cement.
    

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    OR
    11 Explain thick film, thin film and extreme insulation.