No. of Printed Pages: 3 IBET-GIS I
DIPLOMA IN CML ENGINEERING DCLE(G) I DIPLOMA IN MECHANICAL ENGINEERING I DCLEVI I DMEVI I DELVI I DECVI I DCSVI I ACCLEVI I ACMEVI I ACELVI I ACECVI I ACCSVI
Term-End Examination
June,
BET-013 CHEMISTRY
Time 2 hours Maximum Marks: 70
Note: Att€mpt five questions in all. Question number 1 is compulsory. Answer any four questions from questions no. 2 to 8. All questions carry equal marks.

1. Answer the following questions in brief: Write the two abundant components of air along with their percentage content in the atmosphere. 2 Write the electronic configuration of C and Mg 2 What is an alloy? Give two examples. 2 Name four important ores of iron. 2 What is crude oil 2 Name any four colouring materials of glass. 2 What are addition polymers 2

2. Why is an anion always larger than its parent atom? 4

Explain the periodic trends of the following properties: 8

Atomic Radius

Ionisation Energy

Metallic Character

Ionic Radius

Name two important zones of atmosphere. 2

3. Describe the preparation, properties and uses of chlorine. 8

Explain the Ammonia Synthesis by Haber process. 4

Give the oxidation states of Nitrogen in NO2 and HN02 . 2

4. Draw a neat diagram of Blast furnace. 4

Write a short note on Intermetallic compounds, giving two examples. 6

If the pH of a solution is find its pOH. (pkw 14) 4

5. Write a detailed note on boiler corrosion and its prevention methods. 10

Write any four characteristics of a good fuel. 4

6. What do you understand by free radical polymerisation Explain in detail with examples. 8

What is meant by 'Synthetic Petrol' Give anyone method for its synthesis. 6

7. Compare and write the differences between sliding friction and rolling friction. 8

Write short notes on the following: 6
Nylon
Polyesters

8. What is glass What are the functions of borax and alumina used in the manufacture of glass 8

What are ceramics How are these classified 6