First Semester Engineering Chemistry - I Question Bank 3s76d
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CY2151- ENGINEERING CHEMISTRY-I QUESTION BANK PART-A UNIT-I POLYMER CHEMISTRY 1. What is degree of polymerization?
No. of repeating units in a polymeric network. 2. Mention functionality of a monomer with suitable example. No. of
bonding or reactive site in a monomer. 3. What are co- polymers? Give example. Formed by
ing of two different monomer. 4. What are engineering plastics?
High molecular weight polymer resin posses mechanical strength toughness durability. 5. What is a dead polymer?
The product of additional polymerization is known as dead polymer.s 6. Define Tacticity.
The orientation of monomeric units in a polymer is called tacticity. 7. Write any two thermal initiators used in thermal polymerization.
Acetyl peroxide & Benzoyl peroxide. 8. Mention the monomers which are polymerized in anionic polymerisation.
Acrylonitrite, methylacrylate, methylmethacrylate. 9. What are homochain and heterochain polymer? Homochain: Addition polymer, Chain is made up of same type of atom Heterochain: condensation polymer, Chain is made up of different types of atom
10. Why thermosetting plastics cannot be remolded?
Because the chains are ed by strong covalent force PART - B 11. 12.
Write in brief on classification of polymers Write in detail on epoxy resin 1
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13. 14. 15. 16. 17. 18.
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Explain bulk polymerization technique Discus cationic polymerisation mechanism Compare thermoplastics with thermosetting plastics Discuss free radical polymerization mechanism Write any three properties of nylon 6,6 Write in detail on epoxy resin
UNIT-II CHEMICAL THERMODYNAMICS 1. What is a system? It is the part if the physical universe to which we direct out attention for the purpose of experimental or theoretical investigation. 2. What is an extensive property?
An extensive property of a system depends upon the total amount of substance in the system. 3. What is a process? Mention its type. The operation which brings about the changes in the state of the system is called a process. Types: i) Isothermal Process ii) Adiabatic process iii) cyclic process.
4. Define II law of thermodynamics?
Heat cannot of itself from colder to hotter body without the intervention of any external agency. 5. What is Gibbs free energy?
The isothermally available energy present in a system is called free energy. 6. Mention any two applications of clausius. Molar Latent heat of vaporization can be calculated. To study the effect of pressure on boiling point.
7. Define work function?
The part of the internal energy which is isothermally available is called the work function of the system. 8. Define entropy.
It is the measure of degree of disorder or randomness in a molecular system. 9. What is an adiabatic process? 2
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A process is said to be adiabatic if no heat enters or leaves the system during any step of the process. 10. Write the significance of vant’ hoff equation. To calculate H of a reaction
by measuring the values of equilibrium constant at two different temperatures. To calculate the value of equilibrium constant at a particular temperatures. PART – B 11. 12. 13. 14. 15. 16. 17. 18.
Drive an expression for the entropy change of an ideal gas. Explain clausius inequality. Drive any two Maxwell relations. Compare reversible process with irreversible process. Drive an expression for the entropy change for on irreversible process. Write the expression of work function. Drive vont Hoff isotherm. Discuss the criteria of spontaneity.
UNIT –III PHOTOCHEMISTRY & SPECTROSCOPY 1. State Grothus –Draper Law. Only the light that is absorbed by the substance can bring about a chemical change in the substance. 2. State Starck- Einstein Law.
Each molecule taking part in a photochemical reaction absorbs one quantum of radiation. 3. Write any two reasons for high quantum yield.
Formation of intermediate product will act as a catalyst. Absobtion of raditions in the primary step produces atoms or free radicals which initiate a series of chain reaction. 4. What is a photosensitiser?
The foreign substance which absorbs light radiation and transfers the absorbed energy to the reactant is called photo sensitizer. 5. What is quenching? 3
CSEITQUESTIONS.BLOGSPOT.IN
CSEITQUESTIONS.BLOGSPOT.IN
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When the foreign substance in the excited state colloids with another substance it gets converted into some other product is called quenching. 6. What are chromophores? Give example.
The group (multiple bonds) which are the reason for colour of a compound. N=N-(azo). 7. Define the term bathochromic shift.
The shift of an absorbtion maximum towards longer wavelength is called bathochromic or red shift. 8. What if finger print region? -1
The IR region 1400-700cm gives very rich and intense absorption bands is called finger print region. 9. Methane does not absorb IR energy. Why?
Because four hydrogen atoms of methane vibrate symmetrically.
10.
What are the functions of auxochromes? It deepens the color of the chromophore.
They are required to make the chromogen -a dye. PART-B : 1. 2. 3. 4. 5. 6. 7. 8. 9.
State and explain Stark-Einstein Law. Compare fluorescence with Phosphorescence. Explain the Block Diagram of IR spectrometer. Write down the various Electronic Transitions. Explain Chemiluminescence with example. Derive Beers law. How will you determine the quantum efficiency? Explain Photosensitisation. Calculate the IR active bands for H2O, C2H4, HCl.
UNIT-IV PHASE RULE & ALLOYS 1. State phase rule. 4
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It explains the heterogeneous equilibrium. F=C-P+2. 2. Define phase. Any homogeneous, physically distinct mechanically part of a system bound by a boundary surface. 3. What is triple point? Point where all three phases are at equilibrium. 4.
Define degree of freedom.
Minimum numbers of variable (P, T, and C) which need to be define the state of
a system. 5.
A system consists of benzene and water. What is the number of phases? Two
6.
Discuss the significance of eutectics mixture. We can predict the formation of solder. They are used in safety devices.
7. Mention some important properties of alloys. Durability, Resists corrosion, Low electrical conductivity. 8.
What are Stainless steels? It is an alloy of Iron with Carbon which resists corrosion by atmosphere and also by chemicals.
9. What is the main purpose of alloying steel? To resist corrosion and to improve the life time. 10. What are the basic differences between Steel and bronze? Bronze has lower melting point than steel and also better heat than steel. PART - B
1.State phase rule and explain the . 2.Discuss any three heat treatment of steel. 3.What is Nichrome mention its uses. 4.Discuss Pb-Ag system. 5.Discuss Water system in detail. 6.Describe Zn-Mg System. 7.Write in brief on Stainless steel. 8.Write in brief on bronze.
5
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UNIT-V NANOCHEMISTRY 1. Define Nanotechnology.
It is defined as the design, production, characterization and applications of systems, structures and devices of nanometer size. 2. How are nanomaterial classified?
Nanomaterials with one dimension, Nanomaterials with two dimension, nanomaterials with three dimension. 3. What are nanoparticles?
These are particles having three dimensional nanoscale. Eg. CaO, CdS. 4. What is a top down process?
Bulk materials are broken into nanosized particles in this method 5. What is a bottom up process? Nanosized materials are produced by building up of atom by atom in this process.
6. What are nanotubes?
Nanotube has a nanometer scale tube like structure. 7. What are nanorods?
Nanomaterials having long sticks or rod shapes with diameter in nanoscale and a length very much longer are called nanorods. 8. Mention any three uses of nanorods. In display
technologies.
In Energy harvesting.In LED 9. Mention any four methods used to synthesis nanomaterial. Precipitation Hydrothermal Solvothermal Thermolysis 10. Mention the various fields in which nanomaterials are used? Electrical and Electronic
Devices. Memory Devices. Fuel Cells. 6
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Energy production.
PART – B: 1.Explain size dependent properties. 2.Describe hydrothermal method of nano-material Synthesis. 3.Explain precipitation chemical vapour deposition methods of nanomaterial synthesis. 4.Write an explanatory note on nano-cluster, nano-rod & nono-tube. 5.Write the salient properties of nano-materials. 6.Explain Laser- Ablation Method. 7.Write any four applications of nano-materil.
7
CSEITQUESTIONS.BLOGSPOT.IN
CSEITQUESTIONS.BLOGSPOT.IN
CY2151- ENGINEERING CHEMISTRY-I QUESTION BANK PART-A UNIT-I POLYMER CHEMISTRY 1. What is degree of polymerization?
No. of repeating units in a polymeric network. 2. Mention functionality of a monomer with suitable example. No. of
bonding or reactive site in a monomer. 3. What are co- polymers? Give example. Formed by
ing of two different monomer. 4. What are engineering plastics?
High molecular weight polymer resin posses mechanical strength toughness durability. 5. What is a dead polymer?
The product of additional polymerization is known as dead polymer.s 6. Define Tacticity.
The orientation of monomeric units in a polymer is called tacticity. 7. Write any two thermal initiators used in thermal polymerization.
Acetyl peroxide & Benzoyl peroxide. 8. Mention the monomers which are polymerized in anionic polymerisation.
Acrylonitrite, methylacrylate, methylmethacrylate. 9. What are homochain and heterochain polymer? Homochain: Addition polymer, Chain is made up of same type of atom Heterochain: condensation polymer, Chain is made up of different types of atom
10. Why thermosetting plastics cannot be remolded?
Because the chains are ed by strong covalent force PART - B 11. 12.
Write in brief on classification of polymers Write in detail on epoxy resin 1
CSEITQUESTIONS.BLOGSPOT.IN
13. 14. 15. 16. 17. 18.
CSEITQUESTIONS.BLOGSPOT.IN
CSEITQUESTIONS.BLOGSPOT.IN
Explain bulk polymerization technique Discus cationic polymerisation mechanism Compare thermoplastics with thermosetting plastics Discuss free radical polymerization mechanism Write any three properties of nylon 6,6 Write in detail on epoxy resin
UNIT-II CHEMICAL THERMODYNAMICS 1. What is a system? It is the part if the physical universe to which we direct out attention for the purpose of experimental or theoretical investigation. 2. What is an extensive property?
An extensive property of a system depends upon the total amount of substance in the system. 3. What is a process? Mention its type. The operation which brings about the changes in the state of the system is called a process. Types: i) Isothermal Process ii) Adiabatic process iii) cyclic process.
4. Define II law of thermodynamics?
Heat cannot of itself from colder to hotter body without the intervention of any external agency. 5. What is Gibbs free energy?
The isothermally available energy present in a system is called free energy. 6. Mention any two applications of clausius. Molar Latent heat of vaporization can be calculated. To study the effect of pressure on boiling point.
7. Define work function?
The part of the internal energy which is isothermally available is called the work function of the system. 8. Define entropy.
It is the measure of degree of disorder or randomness in a molecular system. 9. What is an adiabatic process? 2
CSEITQUESTIONS.BLOGSPOT.IN
CSEITQUESTIONS.BLOGSPOT.IN
CSEITQUESTIONS.BLOGSPOT.IN
A process is said to be adiabatic if no heat enters or leaves the system during any step of the process. 10. Write the significance of vant’ hoff equation. To calculate H of a reaction
by measuring the values of equilibrium constant at two different temperatures. To calculate the value of equilibrium constant at a particular temperatures. PART – B 11. 12. 13. 14. 15. 16. 17. 18.
Drive an expression for the entropy change of an ideal gas. Explain clausius inequality. Drive any two Maxwell relations. Compare reversible process with irreversible process. Drive an expression for the entropy change for on irreversible process. Write the expression of work function. Drive vont Hoff isotherm. Discuss the criteria of spontaneity.
UNIT –III PHOTOCHEMISTRY & SPECTROSCOPY 1. State Grothus –Draper Law. Only the light that is absorbed by the substance can bring about a chemical change in the substance. 2. State Starck- Einstein Law.
Each molecule taking part in a photochemical reaction absorbs one quantum of radiation. 3. Write any two reasons for high quantum yield.
Formation of intermediate product will act as a catalyst. Absobtion of raditions in the primary step produces atoms or free radicals which initiate a series of chain reaction. 4. What is a photosensitiser?
The foreign substance which absorbs light radiation and transfers the absorbed energy to the reactant is called photo sensitizer. 5. What is quenching? 3
CSEITQUESTIONS.BLOGSPOT.IN
CSEITQUESTIONS.BLOGSPOT.IN
CSEITQUESTIONS.BLOGSPOT.IN
When the foreign substance in the excited state colloids with another substance it gets converted into some other product is called quenching. 6. What are chromophores? Give example.
The group (multiple bonds) which are the reason for colour of a compound. N=N-(azo). 7. Define the term bathochromic shift.
The shift of an absorbtion maximum towards longer wavelength is called bathochromic or red shift. 8. What if finger print region? -1
The IR region 1400-700cm gives very rich and intense absorption bands is called finger print region. 9. Methane does not absorb IR energy. Why?
Because four hydrogen atoms of methane vibrate symmetrically.
10.
What are the functions of auxochromes? It deepens the color of the chromophore.
They are required to make the chromogen -a dye. PART-B : 1. 2. 3. 4. 5. 6. 7. 8. 9.
State and explain Stark-Einstein Law. Compare fluorescence with Phosphorescence. Explain the Block Diagram of IR spectrometer. Write down the various Electronic Transitions. Explain Chemiluminescence with example. Derive Beers law. How will you determine the quantum efficiency? Explain Photosensitisation. Calculate the IR active bands for H2O, C2H4, HCl.
UNIT-IV PHASE RULE & ALLOYS 1. State phase rule. 4
CSEITQUESTIONS.BLOGSPOT.IN
CSEITQUESTIONS.BLOGSPOT.IN
CSEITQUESTIONS.BLOGSPOT.IN
It explains the heterogeneous equilibrium. F=C-P+2. 2. Define phase. Any homogeneous, physically distinct mechanically part of a system bound by a boundary surface. 3. What is triple point? Point where all three phases are at equilibrium. 4.
Define degree of freedom.
Minimum numbers of variable (P, T, and C) which need to be define the state of
a system. 5.
A system consists of benzene and water. What is the number of phases? Two
6.
Discuss the significance of eutectics mixture. We can predict the formation of solder. They are used in safety devices.
7. Mention some important properties of alloys. Durability, Resists corrosion, Low electrical conductivity. 8.
What are Stainless steels? It is an alloy of Iron with Carbon which resists corrosion by atmosphere and also by chemicals.
9. What is the main purpose of alloying steel? To resist corrosion and to improve the life time. 10. What are the basic differences between Steel and bronze? Bronze has lower melting point than steel and also better heat than steel. PART - B
1.State phase rule and explain the . 2.Discuss any three heat treatment of steel. 3.What is Nichrome mention its uses. 4.Discuss Pb-Ag system. 5.Discuss Water system in detail. 6.Describe Zn-Mg System. 7.Write in brief on Stainless steel. 8.Write in brief on bronze.
5
CSEITQUESTIONS.BLOGSPOT.IN
CSEITQUESTIONS.BLOGSPOT.IN
CSEITQUESTIONS.BLOGSPOT.IN
UNIT-V NANOCHEMISTRY 1. Define Nanotechnology.
It is defined as the design, production, characterization and applications of systems, structures and devices of nanometer size. 2. How are nanomaterial classified?
Nanomaterials with one dimension, Nanomaterials with two dimension, nanomaterials with three dimension. 3. What are nanoparticles?
These are particles having three dimensional nanoscale. Eg. CaO, CdS. 4. What is a top down process?
Bulk materials are broken into nanosized particles in this method 5. What is a bottom up process? Nanosized materials are produced by building up of atom by atom in this process.
6. What are nanotubes?
Nanotube has a nanometer scale tube like structure. 7. What are nanorods?
Nanomaterials having long sticks or rod shapes with diameter in nanoscale and a length very much longer are called nanorods. 8. Mention any three uses of nanorods. In display
technologies.
In Energy harvesting.In LED 9. Mention any four methods used to synthesis nanomaterial. Precipitation Hydrothermal Solvothermal Thermolysis 10. Mention the various fields in which nanomaterials are used? Electrical and Electronic
Devices. Memory Devices. Fuel Cells. 6
CSEITQUESTIONS.BLOGSPOT.IN
CSEITQUESTIONS.BLOGSPOT.IN
CSEITQUESTIONS.BLOGSPOT.IN
Energy production.
PART – B: 1.Explain size dependent properties. 2.Describe hydrothermal method of nano-material Synthesis. 3.Explain precipitation chemical vapour deposition methods of nanomaterial synthesis. 4.Write an explanatory note on nano-cluster, nano-rod & nono-tube. 5.Write the salient properties of nano-materials. 6.Explain Laser- Ablation Method. 7.Write any four applications of nano-materil.
7
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