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[QUOTE=hemalathaijt;201504][B]Name of the organisation[/B] : Sahrdaya College of Engineering And Technology (sahrdaya.ac.in)
[B]Description [/B]: Sample Question Paper 
[B]
Model Question List[/B] : [URL]http://www.sahrdaya.ac.in/modelexam.php[/URL]
[B]Sample Question Paper[/B] : [URL]http://www.sahrdaya.ac.in/photoupload/data/modelexam/104.docx[/URL]

[B]SAHRDAYA COLLEGE OF ENGINEERING & TECHNOLOGY
KODAKARA
Combined First and Second Semester B.Tech Degree
MODEL QUESTION PAPER,  APRIL 2012
SUBJECT :EN 09 104- ENGINEERING CHEMISTRY
(Common to all branches of B. Tech)
Time : 3 Hours        Maximum Marks : 70[/B]

Part – A
Answer all the questions. Each question carries 2 Marks (5 X 2 = 10 Marks)                                                              
1. Differenciate between n-type and p- type semiconductor.
2. What do you mean by break point chlorination 
3. Define Reduction potential and Oxidation potential
4. What is meant by Electrochemical series. What is its importance
5. What is stressCorrosion.

Part - B
Answer any four questions, Each question carries  5 Marks  ( 4 X 5 = 20 Marks )
6. What are Carbon nanotubes. Give any four applications of carbon nanotubes/ nanowires
7. Give an account of the various steps involved in the free radical mechanism for addition polymerization of a vinyl compound
8. Write briefly on vulcanization of rubber
9. What is  M /MA / A- type electrode. Explain the working of such an electrode with a suitable example
10. What is the basic principle involved in the cathodic protection methods for control of corrosion. Explain the sacrificial anodic protection method
11. What is BOD. Write briefly the experimental procedure for the determination of BOD

Part -C
Answer (a) or (b) of each  questions. Each question carries 10 Marks( 4 X 10 Marks = 40 )
12. (a) What is  band theory for conductivity in solids. Explain the conductivity in n-type and p-type semiconductors based on the theory
OR
(b)Describe the principle and procedure  involved in the estimation of different types Of hardness present in a water sample.
13. (a)What do you mean by ionic polymerization? Explain with relevant reactions.
OR
(b) Givea detailed note on theories of mechanism of lubrication.   
14. (a) (i) What is a salt bridge. What is its significance                                               ( 5 Marks)
(ii)Explain the determination of e.m.f of a cell by poggendorff ‘s compensation method  ( 5 Marks)
OR
(b)Explain   (i) The construction and working of a Nickel- Cadmium storage cell  ( 5 Marks)
(ii) The mechanism of buffering action of a Basic buffer                                         ( 5 Marks)
15. (a) What are paints . Give an account of the various constituents and  their function in a paint with examples
OR
(b) (i)  Give an account on thermal pollution                                                   ( 5 Marks)
(ii) How are metals protected from corrosion by electroplating             ( 5 Marks )[/QUOTE]

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