2010 Jawaharlal Nehru Technological University, Hyderabad Code No: 09A1BS03 R09 Set No. 4 I B.Tech Regular Examinations,JUNE 2010 ENGINEERING CHEMISTRY Question paper
Code No: 09A1BS03 R09 Set No. 4
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. What is meant by a phase diagram? With the help of a phase diagram, explain the
following ?
(a) Triple point
(b) Eutectic point. [15]
2. Classify the following fuels space by furnishing proper reasons.
(a) Coke
(b) Petroleum
(c) Benzol
(d) Biogas
(e) Lignite
(f) LPG
(g) Natural gas
(h) Anthracite. [15]
3. What is meant by coagulation of colloids? How is it brought out? [15]
4. (a) Why is hard water harmful to boilers?
(b) Describe the causes and harmful e ects of scale formation.
(c) One liter of water from Khammam Dist. in Andhra Pradesh showed the
following analysis: Mg(HCO3)2 = 0.0256 gms, Ca(HCO3)2 = 0.0156 gms, NaCl
= 0.0167 gms, CaSO4 = 0.0065 gms, and MgSO4 = 0.0054 gms. Calculate the
lime & soda required for softening of 10,000 litres of water. [4+4+7]
5. (a) What is the di erence between free-radical and ionic chain polymerization?
(b) Write a note on preparation, properties and uses of
i. bakelite
ii. PVC. [5+5+5]
6. How are the following properties in
uence the stability of refractories?
(a) Chemical innertness.
(b) Refractoriness under load.
(c) Refractoriness.
(d) Dimentional stability. [15]
7. (a) What do you understand by electrochemical series? How is this series useful
in the determination of corrosion of metals. 8M
(b) The resistance of a 0.1N solution of an electrolyte of 40 ohms. If the distance
between the electrodes is 1.2 cm and area of cross section is 2.4 cm2. calculate
equivalent conductivity. [8+7]
8. (a) Discuss the in
uence of following factors on corrosion:-
i. Over voltage
ii. Nature of the metal
iii. Nature of environment.
(b) Explain the nature and role of constituents of organic paints. [9+6]
KEYWORDS:ENGINEERING CHEMISTRY,ENGINEERING CHEMISTRY QUESTION PAPER,JNTU,JNTU QUESTION PAPER,JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD REGULAR EXAMINATIONS JUNE ENGINEERING CHEMISTRY
Code No: 09A1BS03 R09 Set No. 4
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. What is meant by a phase diagram? With the help of a phase diagram, explain the
following ?
(a) Triple point
(b) Eutectic point. [15]
2. Classify the following fuels space by furnishing proper reasons.
(a) Coke
(b) Petroleum
(c) Benzol
(d) Biogas
(e) Lignite
(f) LPG
(g) Natural gas
(h) Anthracite. [15]
3. What is meant by coagulation of colloids? How is it brought out? [15]
4. (a) Why is hard water harmful to boilers?
(b) Describe the causes and harmful e ects of scale formation.
(c) One liter of water from Khammam Dist. in Andhra Pradesh showed the
following analysis: Mg(HCO3)2 = 0.0256 gms, Ca(HCO3)2 = 0.0156 gms, NaCl
= 0.0167 gms, CaSO4 = 0.0065 gms, and MgSO4 = 0.0054 gms. Calculate the
lime & soda required for softening of 10,000 litres of water. [4+4+7]
5. (a) What is the di erence between free-radical and ionic chain polymerization?
(b) Write a note on preparation, properties and uses of
i. bakelite
ii. PVC. [5+5+5]
6. How are the following properties in
uence the stability of refractories?
(a) Chemical innertness.
(b) Refractoriness under load.
(c) Refractoriness.
(d) Dimentional stability. [15]
7. (a) What do you understand by electrochemical series? How is this series useful
in the determination of corrosion of metals. 8M
(b) The resistance of a 0.1N solution of an electrolyte of 40 ohms. If the distance
between the electrodes is 1.2 cm and area of cross section is 2.4 cm2. calculate
equivalent conductivity. [8+7]
8. (a) Discuss the in
uence of following factors on corrosion:-
i. Over voltage
ii. Nature of the metal
iii. Nature of environment.
(b) Explain the nature and role of constituents of organic paints. [9+6]
KEYWORDS:ENGINEERING CHEMISTRY,ENGINEERING CHEMISTRY QUESTION PAPER,JNTU,JNTU QUESTION PAPER,JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD REGULAR EXAMINATIONS JUNE ENGINEERING CHEMISTRY