Exam Details
| Subject | engineering chemistry | |
| Paper | ||
| Exam / Course | b.tech | |
| Department | ||
| Organization | Institute Of Aeronautical Engineering | |
| Position | ||
| Exam Date | December, 2016 | |
| City, State | telangana, hyderabad |
Question Paper
Hall Ticket No Question Paper Code: AHS005
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
B.Tech I Semester End Examinations (Regular) December, 2016
Regulation: IA R16
ENGINEERING CHEMISTRY
(Common for all branches)
Time: 3 Hours Max Marks: 70
Answer ONE Question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
UNIT I
1. Describe the construction and working of lead acid storage battery. Give the reactions that
occur during discharge. Mention its applications.
Write the cell representation and calculate the EMF for the cell reaction:
Fe2+ Zn2+ Fe(s):Given; E0 values of iron and zinc are -0.44 V
and -0.76 V respectively.
2. Derive the Nernst equation for a single electrode potential.
What is a reference electrode? Give the construction and working of calomel electrode with
reactions.
UNIT II
3. What are the different reactions taking place at the cathode during corrosion? How do cathodic
inhibitors work to reduce the rate of these reactions (Mention any
Explain the process of tinning and galvanizing with example.
4. What is cathodic protection? Explain the sacrificial anode method of protection.
Discuss the effect of the following factors on rate of corrosion
i. Nature of metal
ii. Nature of environment
UNIT III
5. Explain the determination of hardness of water by complexometric method.
A sample water of 100 ml required 12.6 ml of 0.02 M EDTA solution with EBT as indicator and
8.4 ml of 0.02 M EDTA for the same volume of water after removing the carbonate hardness.
Calculate the total, permanent and temporary hardness in terms of calcium carbonate equivalents.
Page 1 of 2
6. Compare and contrast the temporary and permanent hardness of water.
Calculate temporary and permanent hardness of a water sample which contains 6.8mg of CaSO4,
33mg of CaCl2, 40mg of Na2SO4, 24mg of MgSO4 per liter of the water sample. (Given Molar
mass of Ca=40g, Na=23g, Mg=24g, S=32g, O=16g, Cl=35.0g)
UNIT IV
7. Differentiate addition and condensation polymerisation. Give suitable examples.
What are refractories? Explain how they are classified and give atleast two advantages.
8. Define and differentiate thermoplastic and thermosetting polymers (any 5 points). Give an example
for each type
What is cement? Discuss the merits and demerits of dry and wet process for the manufacture of
Portland cement.
UNIT V
9. What is cracking? Explain the process of fixed bed catalytic cracking of petroleum.
Explain Ultimate analysis of coal along with its significance
10. Describe fractional distillation of petroleum mentioning the components, composition, boiling
point ranges and applications.
A sample of coal was found to have the following composition by weight. C
O and rest is ash. Calculate GCV and NCV.
Page 2 of 2
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
B.Tech I Semester End Examinations (Regular) December, 2016
Regulation: IA R16
ENGINEERING CHEMISTRY
(Common for all branches)
Time: 3 Hours Max Marks: 70
Answer ONE Question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
UNIT I
1. Describe the construction and working of lead acid storage battery. Give the reactions that
occur during discharge. Mention its applications.
Write the cell representation and calculate the EMF for the cell reaction:
Fe2+ Zn2+ Fe(s):Given; E0 values of iron and zinc are -0.44 V
and -0.76 V respectively.
2. Derive the Nernst equation for a single electrode potential.
What is a reference electrode? Give the construction and working of calomel electrode with
reactions.
UNIT II
3. What are the different reactions taking place at the cathode during corrosion? How do cathodic
inhibitors work to reduce the rate of these reactions (Mention any
Explain the process of tinning and galvanizing with example.
4. What is cathodic protection? Explain the sacrificial anode method of protection.
Discuss the effect of the following factors on rate of corrosion
i. Nature of metal
ii. Nature of environment
UNIT III
5. Explain the determination of hardness of water by complexometric method.
A sample water of 100 ml required 12.6 ml of 0.02 M EDTA solution with EBT as indicator and
8.4 ml of 0.02 M EDTA for the same volume of water after removing the carbonate hardness.
Calculate the total, permanent and temporary hardness in terms of calcium carbonate equivalents.
Page 1 of 2
6. Compare and contrast the temporary and permanent hardness of water.
Calculate temporary and permanent hardness of a water sample which contains 6.8mg of CaSO4,
33mg of CaCl2, 40mg of Na2SO4, 24mg of MgSO4 per liter of the water sample. (Given Molar
mass of Ca=40g, Na=23g, Mg=24g, S=32g, O=16g, Cl=35.0g)
UNIT IV
7. Differentiate addition and condensation polymerisation. Give suitable examples.
What are refractories? Explain how they are classified and give atleast two advantages.
8. Define and differentiate thermoplastic and thermosetting polymers (any 5 points). Give an example
for each type
What is cement? Discuss the merits and demerits of dry and wet process for the manufacture of
Portland cement.
UNIT V
9. What is cracking? Explain the process of fixed bed catalytic cracking of petroleum.
Explain Ultimate analysis of coal along with its significance
10. Describe fractional distillation of petroleum mentioning the components, composition, boiling
point ranges and applications.
A sample of coal was found to have the following composition by weight. C
O and rest is ash. Calculate GCV and NCV.
Page 2 of 2
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