No. of Printed Pages: 3 IBET-013I
DIPLOMA IN CIVIL 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 Examination
o U -J...:5 December, 2016
BET-013 CHEMISTRY
Time hours Maximum Marks: 70
Note: Attempt 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: What is law of octaves? 2 What is a periodic table? Name the first two elements in the periodic table. 2 Define metallic character of an element. 2 Differentiate between an ore and an alloy. 2
List different types of hardness of water. 2
What are lubricating oils? 2 What is the hydrological cycle? 2

2. Which one is larger-Na or Na and why? 4 Discuss in detail about the modem periodic table. 8 Write the electronic configuration of Cu 2

3. Why is the second ionisation energy higher than the first ionisation energy 4 Describe any two methods for preparation of oxygen. 4 How do you extract aluminium from its ores? 6

4. Give the formulae of the following compounds: Dinitrogen monoxide

(ii) Nitric oxide

(iii) Nitrogen dioxide

(iv) Dinitrogen pentoxide 4 Differentiate between specific heat and latent heat. 4
What do you understand by secondary fuels? Give two examples each. 6

5. Mention any two units to represent hardness of water and explain them. 4 What do you understand by pH If pOH of a solution is what is its pH (pKw 14) 4 Name any four gaseous fuels. 4

6. Write a detailed note on semi-solid lubricants including their merits and demerits. 8 Explain about viscosity and viscosity index. 6

7. What is gutta percha 2 Explain glass transition temperature with a diagram. 6 Give an account of the important methods to prevent brittle fracture of glass. 6

8. What is the plasticity of clay? 4 How are refractory materials classified? 6 How will you determine actual available chlorine in bleaching powder? 4