2010 Jawaharlal Nehru Technological University, Hyderabad Code No: 09A1BS03 R09 Set No. 1 I B.Tech Regular Examinations,JUNE 2010 ENGINEERING CHEMISTRY Question paper
Code No: 09A1BS03 R09 Set No. 1
I B.Tech Regular Examinations,JUNE 2010
ENGINEERING CHEMISTRY
Common to CE, ME, CHEM, BME, IT, MECT, MEP, AE, BT, AME, ICE,
E.COMP.E, MMT, ETM, EIE, CSE, ECE, EEE
Time: 3 hours Max Marks: 75
Answer any FIVE Questions
All Questions carry equal marks
1. (a) Explain the electrochemical theory of corrosion of metals with special reference
to rusting of iron.
(b) Write a note on galvanizing and metal cladding. [8+7]
2. Write a brief account on the following:
(a) Wet Process for the manufacture of cement.
(b) Setting and hardening of cement. [8+7]
3. (a) What are colloids? How are they classi ed?
(b) Di erentiate the dispersed phase from dispersion medium. [8+7]
4. What is meant by cracking of hydrocarbons? What are its objectives? With the
help of neat sketches explain the production of petrol by catalytic cracking. [15]
5. Give proper explanations for the following statements
(a) The fusion curve of ice has a negative slope whereas the sublimation curve has
positive slope in the phase diagram
(b) In lead-silver system, isobaric phase diagrams are studied. [7+8]
6. Explain the synthetic methods, properties and applications of the following elastomers:-
(a) Buna-S rubber
(b) Butyl rubber
(c) Thiokol rubber. [5+5+5]
7. (a) Di erentiate between lime-soda and zeolite processes for softening of water
giving merits and demerits of the two processes.
(b) How is the hardness of water expressed? What are the various units employed?
Explain their interconversion. [9+6]
8. (a) Give reasons for the following statements:-
i. When a zinc rod is dipped in a solution of aq. copper sulphate, copper is
precipitated out.
KEYWORDS:JNTU ENGINEERING CHEMISTRY,JNTU ENGINEERING CHEMISTRY QUESTION PAPER,JNTU,JNTU QUESTION PAPER,JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD REGULAR EXAMINATIONS JUNE JNTU ENGINEERING CHEMISTRY
Code No: 09A1BS03 R09 Set No. 1
I B.Tech Regular Examinations,JUNE 2010
ENGINEERING CHEMISTRY
Common to CE, ME, CHEM, BME, IT, MECT, MEP, AE, BT, AME, ICE,
E.COMP.E, MMT, ETM, EIE, CSE, ECE, EEE
Time: 3 hours Max Marks: 75
Answer any FIVE Questions
All Questions carry equal marks
1. (a) Explain the electrochemical theory of corrosion of metals with special reference
to rusting of iron.
(b) Write a note on galvanizing and metal cladding. [8+7]
2. Write a brief account on the following:
(a) Wet Process for the manufacture of cement.
(b) Setting and hardening of cement. [8+7]
3. (a) What are colloids? How are they classi ed?
(b) Di erentiate the dispersed phase from dispersion medium. [8+7]
4. What is meant by cracking of hydrocarbons? What are its objectives? With the
help of neat sketches explain the production of petrol by catalytic cracking. [15]
5. Give proper explanations for the following statements
(a) The fusion curve of ice has a negative slope whereas the sublimation curve has
positive slope in the phase diagram
(b) In lead-silver system, isobaric phase diagrams are studied. [7+8]
6. Explain the synthetic methods, properties and applications of the following elastomers:-
(a) Buna-S rubber
(b) Butyl rubber
(c) Thiokol rubber. [5+5+5]
7. (a) Di erentiate between lime-soda and zeolite processes for softening of water
giving merits and demerits of the two processes.
(b) How is the hardness of water expressed? What are the various units employed?
Explain their interconversion. [9+6]
8. (a) Give reasons for the following statements:-
i. When a zinc rod is dipped in a solution of aq. copper sulphate, copper is
precipitated out.
KEYWORDS:JNTU ENGINEERING CHEMISTRY,JNTU ENGINEERING CHEMISTRY QUESTION PAPER,JNTU,JNTU QUESTION PAPER,JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD REGULAR EXAMINATIONS JUNE JNTU ENGINEERING CHEMISTRY