CY2111-ENGINEERING CHEMISTRY-I ---ANNA UNIVERSITY --B



B.E/B.TECH DEGREE EXAMINATION, NOVEMBER 2011

FIRST SEMESTER

(Common to all branches- Except Marine engineering)

183101 -ENGINEERING CHEMISTRY-I

Time : Three Hours Maximum : 100 Marks

Answer ALL Questions

PART A (10X2=20 MARKS)

1. Explain the role of Eriochrome Black – T in the EDTA titration.

2. Name an internal method used for high pressure boiler and explain.

3. How is AIBN initiating polymerization?

4. Mention the monomers used for the preparation of Nylon-6,6 and PET.

5. Write any two limitations of Freundlich isotherm.

6. Draw an adsorption isotherm and explain.

7. What are breeder reactors?

8. Write any two advantages of fuel cells.

9. Classify refractories with examples.

10. Define flash and fire points of lubricating oils.

PART B - (5 x 16 = 80 Marks)

11. (a) (i) What is alkalinity? Describe the principle and determination of alkalinity by

mixed indicator titration method. (8)

(ii) Write the role of coagulants in the domestic water treatment and explain the

disinfection method using chlorine. (8)

(OR)

(b) (i) Discuss the demineralization method for the external conditioning of boiler feed

water. (8)

(ii) Define desalination and describe reverse osmosis. (8)

12 (a) (i) Differentiate between addition and condensation polymerization. (8)

(ii) Write the preparation , properties and uses of PVC and Teflon. (8)

(OR)

(b) (i) Identify each one rubber used for tyre and tube manufacturing and discuss about

them. (8)

(ii) What are composites? Describe polymer matrix composites. (8)

13. (a) (i) Differentiate between Physisorption and Chemisorption with examples. (8)

(ii) Illustrate effects of pressure and temperature on adsorption of gases on solids. (8)

(OR)

(b) (i) Derive and discuss Langmuir adsorption isotherm. (8)

(ii) Discuss the zeolite process for water pollution abatement. (8)

14. (a) (i) Distinguish between nuclar fission and nuclar fusion. (8)

(ii) Draw a neat diagram of photovoltaic cell and explain its working principle. (8)

(OR)

(b) (i) Construct a H2 – O2 fuel cell and explain. (8)

(ii) Describe in detail on Nickel – Cadmium rechargeable cell. (8)

15. (a) (i) Discuss any four properties of refractories. (8)

(ii) Write the preparation, properties and uses of silicon carbide and boron carbide. (8)

(OR)

(b) (i) Illustrate the mechanism of thick film and thin film lubrications. (8)

(ii) Write an account of carbon nano tubes and its applications. (8)

B.E/B.TECH DEGREE EXAMINATION, JUNE 2011

FIRST SEMESTER

(Common to all branches- Except Marine engineering)

183101 -ENGINEERING CHEMISTRY-I

Time : Three Hours Maximum : 100 Marks

Answer ALL Questions

PART A (10X2=20 MARKS)

1. What is Calgon conditioning?

2. Distinguish between soft water and demineralized water.

3. What are homochain and heterochain polymers?

4. What are composites?

5. Define the terms adsorbent and adsorbate.

6. Differentiate between adsorption and absorption.

7. What is nuclear fission?

8. What is fuel cell?

9. What are lubricants?

10. Define the term nanochemistry.

PART B - (5 x 16 = 80 Marks)

11. (a) (i) Describe demineralization process with its advantages. (8)

(ii) Briefly explain the four disinfection methods. (8)

(OR)

(b) (i) How is scale formed in boilers? What are its drawbacks? (8)

(ii) Explain reverse osmosis with its advantages . (8)

12 (a) (i) Explain the mechanism of free radical polymerization reaction. (8)

(ii) Discuss the preparation , properties and uses of PVC. (8)

(OR)

(b) (i) Differentiate between thermoplastics and thermosetting plastics with examples. (8)

(ii) What is Butyl rubber? Give the properties and uses of Butyl rubber. (8)

13. (a) (i) Derive the Freundlich’s adsorption isotherm. (8)

(ii) Write in brief about the role of activated carbon in pollution control . (8)

(OR)

(b) (i) Discuss the factors that influence adsorption of gases on solids. (8)

(ii) Distinguish between Physisorption and Chemisorption. (8)

14. (a) (i) Explain the functioning of nuclear reactor. (8)

(ii) Discuss briefly about the principle and functions of lithium battery. (8)

(OR)

(b) (i) Explain the principle and functions of lead- acid battery. (8)

(ii) Discuss briefly about the principle and functions of a fuel cell. (8)

15. (a) (i) What are refractories? How are they classified? Give examples. (8)

(ii) Write explanatory notes on silicon carbide. (8)

(OR)

(b) (i) Discuss four important properties of lubricants. (8)

(ii) Explain the fabrication and applications of carbon nano tubes. (8)

B.E/B.TECH DEGREE EXAMINATION, JANUARY 2011

FIRST SEMESTER

(Common to all branches- Except Marine engineering)

183101 -ENGINEERING CHEMISTRY-I

Time : Three Hours Maximum : 100 Marks

Answer ALL Questions

PART A (10X2=20 MARKS)

1. What are the constituents responsible for alkalinity of water?

2. What is hardness of water?

3. What do you mean by vulcanization of rubber?

4. Write down the monomeric units that present in polyurethane.

5. Define physical adsorption.

6. What is an adsorption isotherm?

7. What are nuclear moderators? Give two examples for moderators.

8. What are the advantages of storage batteries?

9. How is hardness of abrasives expressed?

10. What are the carbon nanotubes?

PART B - (5 x 16 = 80 Marks)

11. (a) (i) What is caustic embrittlement? How does it arise? What are the methods of

prevention of caustic embrittlement? (8)

(ii) Explain the determination of total hardness of water by EDTA method. (8)

(OR)

(b) (i) Explain the desalination of water by electro dialysis method. (8)

(ii) What is break – point chlorination? Bring out its significance. (8)

12 (a) (i) Discuss briefly on the methods of preparation of Nylon 6, 6 and mention its uses. (8)

(ii) Explain vulcanization of rubber and its advantages. (8)

(OR)

(b) (i) Explain the different types of classification of plastics with suitable examples . (8)

(ii) What is FRP? Discuss the properties and uses of FRP. (8)

13. (a) (i) Derive the Langmuir adsorption isotherm. (8)

(ii) Write in brief about the role of ion exchangers in pollution control . (8)

(OR)

(b) (i) Discuss the various types of adsorption isotherms. (8)

(ii) Write a note on adsorption of solute from solutions. (8)

14. (a) (i) Explain the nuclear chain reaction with a suitable example. (8)

(ii) How is Nicad battery constructed? Explain the cell reactions involved. (8)

(OR)

(b) (i) Write briefly about the advantages and the limitations of the Wind energy. (8)

(ii) Discuss the principle and functions of an alkaline battery. (8)

15. (a) (i) Discuss any FOUR important properties of refractories. (8)

(ii) Write explanatory notes on synthetic abrasives. (8)

(OR)

(b) (i) Give a brief account on solid lubricants. (8)

(ii) Explain the properties and advantages of carbon nano tubes. (8)

B.E/B.TECH DEGREE EXAMINATION, MAY / JUNE 2010

FIRST SEMESTER

(Common to all branches- Except Marine engineering)

CY2111-ENGINEERING CHEMISTRY-I

Time : Three Hours Maximum : 100 Marks

Answer ALL Questions

PART A (10X2=20 MARKS)

1. How is water sterilized by ozone?

2. What i s calgon conditioning?

3. Why thermosetting plastics can not be remoulded?

4. Mention two advantages of polymer matrix composites.

5. What is Freundlich's adsorption isotherm?

6. Mention any four applications of adsorption.

7. Distinguish between nuclear fission and fusion reactions.

8. What are the applications of lithium batteries?

9. What i s meant by thermal spalling with respect to a refractory?

10. Under what situations solid lubricants are used?

PART B - (5 x 16 = 80 Marks)

11. (a) (i) 0.28 g of CaCO3 was dissolved in HCl and the solution was made upto

one litre with distilled water. 100 ml of the above solution required 28 ml of EDTA

solution on titration. 100 ml of a hard water sample required 33 ml of same EDTA

solution on titration. Another 100 ml of the same water, after boiling, cooling and

filtering required 10 ml of EDTA solution on titration. Calculate the temporary and permanent hardness of water. (8)

(ii) What i s break point chlorination? Indicate its significance. (4)

(iii) 100 ml of raw water sample on titration with N/50 H2SO4 required 12 mlof the acid to phenolphthalein endpoint and 15.5 ml of the acid to methyl orange indicator. Determine the type and amount of alkalinity present in the water sample. (4)

(OR)

11. (b) (i) Explain the demineralization of water by ion-exchange process. How are

exhausted cation and anion exchange resins regenerated? (8)

(ii) What i s reverse osmosis? Explain desalination of water by reverse osmosis

method. What are the advantages of RO method? (8)

12. (a) (i) Distinguish between addition and condensation polymerizations with one

example each. (8)

(ii) Give the preparation and uses of Lexan. (4)

(iii) Mention the properties of engineering plastics. (4)

(OR)

12. (b) (i) What is vulcanization? Explain why natural rubber needs vulcanization.

How is it carried out? (8)

(ii) What are composites? Write a detailed note on fibre-reinforced composites. (8)

13. (a) (i) Differentiate between physisorption and chemisorption. (8)

(ii) What are the various factors influencing the adsorption of a gas on a solid?(8)

(OR)

13. (b) (i) What is the role of adsorbents in catalysis? (8)

(ii) What i s the role of activated carbon in air and water pollution control?(8)

14. (a) (i) With a neat sketch explain the working of light water nuclear power plant.(8)

(ii) Write a note on solar cells. (8)

(OR)

14. (b) (i) What is reversible battery? Describe the construction and working of

Lead acid storage battery with reactions occurring during charging and

discharging cycles. (8)

(ii) What are fuel cells? Describe the construction and working of H2-O2 fuel

cell. (8)

15. (a) (i) Explain any five properties of refractories? (10)

(ii) What are abrasives? How are they classified? Give one example for each.(6)

(OR)

15. (b) (i) What are fluid and boundary lubrications? Explain. (8)(ii) What are carbon nano tubes? Explain any three of their important applications. (8)

B.E/B.TECH DEGREE EXAMINATION, JANUARY 2010

FIRST SEMESTER

(Common to all branches- Except Marine engineering)

CY2111-ENGINEERING CHEMISTRY-I

Time : Three Hours Maximum : 100 Marks

Answer ALL Questions

PART A (10X2=20 MARKS)

1. Calculate the hardness of a water sample containing 2.4 mg of calcium chloride in 500 ml of water?

2. What is Calgon?how does it function in water treatment?

3. Why thermosetting plastics can not be remoulded?.

4. What is the role of Sulphur in the vulcanization of rubber?

5. Compare absorption and adsorption.

6. Mention any four applications of adsorption.

7. Furnish the sequence of reactions in proton cycle nuclear fusion.

8. Give any two advantages of alkaline battery over dry cell.

9. Define refractoriness of a refractory.

10. What are nano materials? Mention any two of their characteristic properties.

PART B-(5 X 16=80)

11.a)

i. How is temporary hardness of water estimated by EDTA method?

ii. What are the requirements of potable water? How will you purify water for drinking purpose?.

(OR)

11b)

i.. What are ion exchange resins? How are they useful in removing hardness of water?

ii. What is desalination? With a neat diagram, describe the 'reverse osmosis' method for the desalination of brackish water.

12a).

i. how are the following polymers prepared?

1. Teflon 2. Polystyrene 3. PET 4. Nylon 6, 6

ii. Explain the mechanism of free radical addition polymerization.

Or

12b).

i. What is natural rubber? Explain why natural rubber needs vulcanization. How is it carried out?

ii. What are composites? Give the preparation and uses of glass fiber reinforced composites and carbon fiber reinforced composites.

13 a).

i. Compare physisorption and chemisorption.

ii. Adsorption of gases on solids is greatly influenced by temperature,pressure and nature of the adsorbent and adsorbate.justify.

Or

b).

i. Describe the role of adsorbents in catalysis with examples.

ii. How is ion exchange adsorption useful in demineralization of water? Explain.

14a).

i. Explain with a neat diagram the parts and functions of a nuclear reactor.

ii. Write a note on photovoltaic cell.

Or

14b).

i. Explain the working of hydrogen oxygen fuel cell.

ii. Write a short note on lithium batteries.

15a).

i. How are alumina and carborundum manufactured?.

ii. What are refractories?how are they classified? .

Or

15b).

i. What are fluid and boundary lubrication? Explain.

ii. What are carbon nano tubes? Explain any three of their important applications.

B.E/B.TECH DEGREE EXAMINATION, MAY / JUNE 2009

FIRST SEMESTER

(Common to all branches- Except Marine engineering)

CY2111-ENGINEERING CHEMISTRY-I

Time : Three Hours Maximum : 100 Marks

Answer ALL Questions

PART A (10X2=20 MARKS)

1. How is the hardness of water expressed?

2. What are the disadvantages of scale formation?

3. How is polymerization classified? Give one example for each class.

4. Write any two uses of PVC.

5. Define the terms adsorbent and adsorbate giving suitable examples.

6. What is an adsorption isotherm?

7. What is nuclear energy? Explain using a suitable example.

8. List any two advantages of lithium batteries.

9. Mention any four natural abrasives.

10. How are lubricants classified? Give one example for each class.

PART B — (5 × 16 = 80 marks)

11.(a)(i) Describe briefly the various methods of internal conditioning of boiler feed water(10)

(ii) 100 ml of a water sample required 20 ml of 0.01 M EDTA for the titration with

Eriochrome Black-T indicator.. 100ml of the same water sample after boiling and

filtering required 10 ml of 0.01 M EDTA. Calculate the total, carbonate and non

carbonate hardness of the sample. (6)

(OR)

(b) (i) Explain the necessity for sterilization of domestic water and discuss the various

methods of sterilization. Discuss in detail about the break point chlorination. ( 10)

(ii) Describe the reverse osmosis method for desalination of sea water with a neat sketch. (6)

12. (a) (i) Write the preparation properties and uses of PET and polyurethane. (8)

(ii) Write a note on FRP. (8)

Or

(b) (i) Distinguish between addition and condensation polymerization. (8)

(ii) Write the mechanism of free radical polymerization. (8)

13. (a) (i) What are the factors that influence the adsorption of gases on solids? Discuss in

detail. (8)

(ii) Explain the role of adsorption in catalysis using an appropriate example. (8)

Or

(b) (i) Derive the Langmuir’s adsorption isotherm and discuss the effect of pressure

on the isotherm. (12)

(ii) Illustrate how the ion exchange adsorption is useful in the demineralization of

water (only the process without diagram). (4)

14. (a) (i) What are the components of a nuclear reactor? Write briefly about each

component. (10)

(ii) Discuss the characteristics of the reaction when uranium undergoes nuclear

fission. (6)

Or

(b) (i) Describe the principle and functioning (charging and discharging) of lead acid

battery. (10)

(ii) Write a note on wind energy. (6)

15. (a) (i) Give a brief account of neutral refractories. (6)

(ii) What are grinding wheels? How are they manufactured? (10)

Or

(b) (i) Discuss the following properties of lubricants.

(1) Flash point. (5)

(2) Pour point. (5)

(ii) Explain the properties and applications of carbon nanotubes. (6)

B.E/B.TECH DEGREE EXAMINATION, JANUARY 2009

FIRST SEMESTER

(Common to all branches- Except Marine engineering)

CY2111-ENGINEERING CHEMISTRY-I

Time : Three Hours Maximum : 100 Marks

Answer ALL Questions

PART A (10X2=20 MARKS)

1. What is hardness of a solution containing 0.585 grams of NaC1 and 0.6 grams of MgSO4 per litre?

2. How is the exhausted zeolite softener bed regenerated?

3. Explain functionality of a monomer with a suitable example.

4. Explain condensation polymerization with a suitable example.

5. What is the role of adsorbent in catalysis?

6. What is the effect of increase in temperature and increase in pressure on the absorption of a gas on a solid?

7. What is breeder reactor?

8. State the reaction when a lead storage battery is recharged?

9. Give two examples for neutral refractory.

10. Explain the lubrication action of graphite.

PART B (5 x 16 = 80 MARKS )

11. (a) (i) Explain the softening of water by deionization process.

(ii) How is the temporary and permanent hardness of water determined?

OR

b) (i) What is meant by reverse osmosis? Explain the purification of water by reverse

Osmosis.

(ii) Explain the softening of water by zeolite process.

 

12. (a) i) Write the mechanism of free radical polymerization.

ii) Discuss the synthesis and uses of SBR and Butyl rubbers.

OR

b) (i) Give an account on fibre reinforced platics.

ii) Describe the synthesis of polyurethane and state its uses.

 

13. a) (i) Derive the Langmuir Adsorption Isothern and interpret the results

1) at Low pressure and (2) at High pressure.

ii) Distinguish between Physisorption and Chemisorption

OR

b) (a) i) State Friendlich adsorption isotherm and explain the terms in it. Explain the different types of adsorption isotherms of gases on solid.

ii) Discuss the role of adsorbands in pollution abatement.

 

14.a) (i) Give an account of H2 = O2 fuel cell.

(ii) Explain the construction and working of Cd-Ni cell.

OR

b) (i) Describe using a block diagram the light water nuclear reactor for power generation.

ii) Give an account of solar cells.

15. (a) i) What are the characteristics of a good refractory? Write a note on carborundum.

ii) What are lubricants? Discuss the different types of lubrication.

OR

(b) Write short notes on any TWO of the following:

i) Carbon nanotubes.

ii) Refractoriness.

iii) Synthetic abrasives.

B.E/B.TECH DEGREE EXAMINATION, MAY/JUNE 2012

FIRST SEMESTER

(Common to all branches- Except Marine engineering)

CY2111 / 183101 -ENGINEERING CHEMISTRY-I

Time : Three Hours Maximum : 100 Marks

Answer ALL Questions

PART A (10X2=20 MARKS)

1. What do you mean by hardness of water? How is it classified?

2. What is caustic embrittlement? How can it be avoided?

3. How is polyurethane prepared?

4. What is the role of sulphur in the vulcanisation of rubber?

5. What is an adsorption isotherm?

6. Mention any two uses of activated carbon.

7. What are non-conventional energy sources? Give two examples.

8. What are the applications of lithium batteries?

9. What are abrasives? Give two examples for natural abrasives.

10. Under what situations solid lubricants are used?

PART B - (5 x 16 = 80 Marks)

11. (a) (i) 50 ml of sample of hard water required 35 ml of 0.01M EDTA in the titration.

50 ml of the same sample of water after boiling required 12 ml of 0.01M EDTA.

Calculate total and temporary hardness of water. (6)

(ii) What is disinfection? Explain the mechanism of disinfection by chlorination.

What are the disadvantages of bleaching powder over other disinfectants? (10)

(OR)

(b) (i) Explain the problems associated with the use of hard water in boilers. (8)

(ii) What is demineralisation? Explain the methods of demineralisation. (8)

12 (a) (i) Distinguish between addition and condensation polymerizations with one example

each. (8)

(ii) Give the preparation and uses of Lexan. (4)

(iii) Mention the properties of engineering plastics. (4)

(OR)

(b) (i) What is vulcanisation of rubber? List out the changes caused due to the

vulcanisation of rubber. (8)

(ii) What are Synthetic rubbers? How is butyl rubber prepared? (8)

13. (a) (i) Compare Physisorption and Chemisorption. (8)

(ii) Adsorption of gases on solids is greatly influenced by temperature, pressure and

nature of the adsorbent and adsorbate. Justify. (8)

(OR)

(b) (i) Describe the role of adsorbents in catalysis with examples. (8)

(ii) How is the ion exchange adsorption useful in demineralisation of water?

Explain. (8)

14. (a) (i)Give an account on the different methods by which solar energy can be

harnessed? (8)

(ii) What are the components of a nuclear reactor? Write briefly about each

component. (8)

(OR)

(b) (i) What is reversible battery? Describe the construction and working of Lead acid

Storage battery with reactions occurring during chargomg and discharge cycles.(8)

(ii) What are fuel cells? Describe the construction and working of H2 – O2 fuel cell. (8)

15. (a) (i) What is meant by refractoriness? How is it measured? (6)

(ii) Write a note on the preparation, properties and uses of fire clay bricks. (6)

(iii) How is norbide synthesised? Mention its properties and uses. (4)

(OR)

(b) (i) Explain the mechanism of lubrication. (8)

(ii)What are nanomaterials? Discuss the typesof carbon nanotubes and their

Applications. (8)

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