UNIT-1

JANUARY 2012

SE

T-1

a. Why there is a decrease in temperature of a real gas when it undergoes

expansion through a porous plug?

b. What is osmosis and what is osmotic pressure?

c. Explain the concept of solubility product with a suitable example. [5M + 5M + 5M]

SE

T-2

a. What is Joule- Thomson effect? What is the reason for the effect?

b. How do you use the phenomenon of osmosis to produce pure water?

c. Find out the solubility product of PbI2 whose solubility is 4x 10 -3

moles per

litre. [5M + 5M + 5M]

SE

T-3

a. Explain briefly the basic refrigeration cycle.

b. Ammonia is synthesized by Haber’s process using a pressure of about 200

atmospheres, a temperature of about 450o C and removing ammonia from

the equilibrium. Justify these conditions.

c. The solubility product of BaSO 4 is 1.5 x 10 -9

. What is the solubility of the

salt in terms of moles per litre. [5M + 5M + 5M]

SE

T-4

a. Briefly explain how air-conditioning differs from refrigeration.

b. What are the advantages of reverse osmosisprocess of purifying brackish

water?

c. What is common ion effect? Explain two ofits uses. [5M + 5M + 5M]

JULY 2011

SE

T-1

a. What do you mean by Enthalpy? How is it related to internal energy of a

system? Calculate the work done in the expansion of 3 moles of hydrogen

reversibly and isothermally at 27 o C from 21.0 lit to 70.3 lit.

b. State and explain Le Chatelier’s principle. With the help of this principle,

work out the conditions which would favor the formation of ammonia and

sulphuric acid.

SE

T-2

a. Prove that the value of Joule Thomson coefficient is zero for an ideal gas.

b. Write the principles of osmosis and reverse osmosis. How this is applied for

desalination process?

c. Explain solubility product of a sparingly soluble salt. How is it determined

from conductance measurements?

SE

T-3

a. What is Joule Thomson effect and what is it due to? Explain the difference

in case of an ideal gas and a real gas.

b. Write a detailed note on the application of Le Chatleier’s principle to

physical equilibria.

SE

T-4

a. What are various types of membranes used in desalination process. Explain

their limitations.

b. State the law of chemical equilibrium. How it can be derived on

thermodynamic considerations.

c. At 410K and a total pressure of 1atm, a mixture of N2(g)and H2(g) in the mole

ratio 1:3 contains 16% of NH 3 (g) at equilibrium. Calculate Kp for the

reaction

FEBRUARY-2011 S

ET

-1 a. Explain with a flow diagram refrigeration process.

b. State and explain Lechatelier’s principle with suitable examples.

[7M + 8M]

SE

T-2

a. Define and explain the terms enthalpy and free energy of a thermodynamic

system.

b. What is osmosis? Explain how this phenomenon can be utilized for

desalination of water.

c. The solubility product k sp of the sparingly soluble salt Ag2CrO4 is 4 x 10 -12

at a particular temperature. Calculate the solubility of silver chromate

in grams per litre at that temperature. The molecular weight of silver

chromate is 264. [4M +7M +4M]

SE

T-3

a. What is Joule Thomson effect? Derive the expression for J T coefficient.

b. What is a semipermeable membrane? What are the different materials that

can be used for semipermeable membranes?

c. Using Lechatelier principle explain the conditions used for the production

of ammonia by Haber’s process. [4M + 4M + 7M]

SE

T-4

a. Define and explain entropy of a thermodynamic system

b. What are the conditions used for the production of sulphur trioxide by

contact process? How do you justify these conditions with reference to

Lechatlier principle?

c. What is solubility product of a salt? Explain with an example how

the solubility of an ionic substance can be found if its solubility product

value is known. [3M + 6M + 6M]

UNIT-2

JANUARY 2012

SE

T-1

a. Explain briefly the Tyndall effect. b. Give (any four) the important characteristics of enzymes.

c. What are the factors that influence the viscosity of a liquid?

[5M+5M+5M]

SE

T-2

a. How do the catalytic poisons function, particularly in contact catalysis?

b. Explain the process of electrophoresis of a colloidal solution; mention two of its applications.

c. Describe briefly the production of acetic acid by fermentation process (diagrams

are not necessary). [5M+5M+5M]

SE

T-3

a. What are catalytic promoters and catalytic poisons? b. Explain the important applications (at least three) of colloid science.

c. How do you use the measurement of relative viscosity of a solution of a polymer, to

find out the molecular weight of the polymer? [5M+5M+5M]

SE

T-4

a. Give examples of two enzymes indicating the specific reactions they catalyse.

b. Briefly discuss the important conditions for the fermentation process to take place. c. What are relative viscosity, specific viscosity and intrinsic viscosity of a solution?

[5M+5M+5M]

JULY 2011

SE

T-1

a. Give examples of catalyst poisoning. How is action of catalyst linked to energy of activation of a reaction?

b. Explain the terms Colloids and crystalloids. How would you separate one from the

other?

c. Give an account of various types of products obtained by fermentation process. d. Water requires 120.5 seconds to flow through a viscometer and the same volume

of acetone requires 49.5 seconds. If the densities of water and acetone at 293K are

9.982X102 Kgm

-3 and 7.92 Kgm

-3 respectively and the viscosity of water at 293K

is 10.05 Pascal, calculate the viscosity of acetone at 293K.

SE

T-2

a. Write an essay on enzyme catalysis.

b. Explain the uses of (i) Dialysis (ii) Ultra filtration in the purification of colloidal

solutions. c. Define the viscosity and discuss the effect of temperature on it.

SE

T-3

a. Differentiate between homogenous and heterogeneous catalysis. Explain both of

these giving one example each with their mechanism.

b. Write a note on the industrial applications of fermentation.

c. Describe methods commonly used for the measurement of viscosity of a liquid.

SE

T-4

a. Write mechanisms of the following reactions (i) Acid hydrolysis of methyl acetate (ii) Hydrogenation of ethylene using nickel catalyst.

b. Discuss the origin of charge on colloidal particles. What is meant by electrical

double layer?

c. Give an account of various types of products obtained by fermentation process. d. Define the viscosity and discuss the effect of temperature on it.

FEBRUARY-2011 S

ET

-1 a. What are the important characteristics of catalysed reactions?

b. Write about FOUR important industrial applications of colloid science

c. Discuss the variation of viscosity of a liquid with temperature [5M+5M+5M]

SE

T-2

a. What are the different theories of catalysis? Explain with examples.

b. Write notes on (i) Tyndall effect (ii) protection and gold number

c. Give a general outline of fermentation process.

[5M+5M+5M]

SE

T-3

a. Write notes on (i) contact catalysis (ii) catalytic poisons

(iii) Tyndall effect (iv) electro-osmosis

b. What is viscosity of a liquid? What are the factors that influence the

viscosity of a fluid? [8M+7M]

SE

T-4

a. What are the different classes of colloidal systems? Explain with examples

b. Write briefly about enzyme catalysis

c. Give an outline of obtaining vinegar from fermentation of liquors

[5M+5M+5M]

UNIT-3

JANUARY 2012

SE

T-1

a. Using Jablonski diagram explain fluorescence.

b. What is an ion selective electrode? Give at least two examples.

c. Explain any two important applications of NMR spectroscopy.

[5M+5M+5M]

SE

T-2

a. What is phosphorescence? Give two important applications of the

phenomenon.

b. What are the important applications of a bio-sensor?

c. Explain the basic principles of proton nuclear magnetic resonance. [5M+5M+5M]

SE

T-3

a. What is fluorescence? Give two important applications of this phenomenon.

b. Write a brief note on fluoride ion-selective electrode.

c. Explain any two important applications of NMR spectroscopy.

[5M+5M+5M]

SE

T-4

a. Differentiate fluorescence and phosphorescence.

b. How are photoelectric detectors useful in fire alarms or smoke detectors?

c. Discuss briefly the importance of ion-selective electrodes.

[5M+5M+5M]

JULY 2011

SE

T-1

a. What are biosensors? What are the requirements of good biosensors?

b. Explain the industrial application of chemiluminiscent compounds.

c. What is an ion selective electrode? Explain the measurement of

concentration of fluoride and nitrate ions in a solution using ion-selective

electrode.

SE

T-2

a. Discuss the construction and working of a typical biosensor.

b. Distinguish between (i) Thermal and photochemical reactions. (ii)

Fluorescence and phosphorescence. (iii) Singlet and triplet states of

molecule.

SE

T-3

a. Write a note on the application of biosensors.

b. Explain the industrial application of chemiluminisencent compounds

c. Write a short note on (i) Photo sensitization (ii) Inter system

crossing (iii) Internal conversion with Jablonski diagram

SE

T-4

a. Distinguish between (i) Thermal and photochemical reactions. (ii)

Fluorescence and phosphorescence. (iii) Singlet and triplet states of

molecule.

b. What is an ion selective electrode? Explain the measurement of

concentration of fluoride and nitrate ions in a solution using ion-selective

membrane electrode.

FEBRUARY-2011

SE

T-1

a. Explain fluorescence and phosphorescence. Under what conditions a

substance exhibits phosphorescence?

b. What is an ion selective electrode? Explain the determination of chloride

and fluoride concentrations with ion selective electrodes. [7M + 8M]

SE

T-2

a. Write notes on biosensors and their applications

b. Write a note on following electrodes.

(i) Glass electrodes (ii) Solid matrix electrode

[7M + 8M]

SE

T-3

a. Define chemical shift. Write and explain the factors influencing chemical

shift.

b. Explain fluorescence and phosphorescence with Jablonski diagram.

[7M + 8M]

SE

T-4

a. Explain the engineering applications of NMR spectroscopy.

b. Write briefly about the following.

(i) Chemical shift (ii) Coupling constant (iii) Biosensor

(iv) Magnetic anisotropy [7M + 8M]

UNIT-4

JANUARY 2012

SE

T-1

a. Differentiate between insulators, conductors and semi-conductors in terms of

valance band and conduction band.

b. Discuss two important applications of super conductors.

c. Explain two important applications of liquid crystals. [6M + 4M + 5M]

SE

T-2

a. What are extrinsic semiconductors? Explain how conduction takes place in

them.

b. What is 1,2,3 super conducting compound? How is it prepared?

c. Explain very briefly the different classes of liquid crystals. [5M + 5M + 5M]

SE

T-3

a. How does doping improve the conduction of semi conductors?

What are the important types of extrinsic semi-conductors?

b. What are the important properties of super conductors?

c. Compare the compact discs and floppy discs as storage devices. [5M + 5M + 5M]

SE

T-4

a. What are super-conductors? How do they differ from normal conductors?

b. Differentiate primary and secondary storage devices used in computers.

c. What are the important common characteristics of liquid crystal materials?

[5M + 5M + 5M]

JULY 2011

SE

T-1

a. What is meant by doping? Name a compound in which both Schottky and

Frankel defects are present.

b. Explain the materials used in making floppy, CD and pendrive. Write about

their working mechanism.

c. What are liquid crystals? Give an account of Bose’s ‘Swarm’ theory of

liquid crystals. What are its limitations?

SE

T-2

a. Explain the semi conductivity in non-stoichiometric oxide crystals

b. Explain the materials used in making floppy, CD and pen drive. Write about

their working mechanism.

c. Draw and discuss the vapour pressure-temperature diagrams of true liquids

and liquid crystals.

SE

T-3

a. Explain the preparation properties and engineering applications of super

conductors.

b. State and explain the various properties of liquid crystals on the basis of the

Swarm theory of Bose.

SE

T-4

a. Explain the preparation properties and engineering applications of super

conductors.

b. State and explain the various properties of liquid crystals on the basis of the

Swarm theory of Bose.

c. What are secondary cells? Describe the construction of Daniel cell. Write the

cell reactions and mention its applications.

FEBRUARY-2011

SE

T-1

a. What are intrinsic semiconductors? Explain the conduction in n- type and p-

type semiconductors

b. Define superconductivity. Discuss the properties and uses of

superconducting materials. [7M + 8M]

SE

T-2

a. Explain the working of different types of storage devices.

b. What are different types of liquid crystals? Explain their structures and

properties.

[7M + 8M]

SE

T-3

a. Define super conductivity. Explain the preparation and structure of 1:2:3

super conducting compound

b. Mention the applications of liquid crystals in varies fields. .

[7M + 8M]

SE

T-4

a. Write a note on band theory of solids.

b. Explain the conduction in the following semiconductors (i) Stoichiometric

semiconductors (ii) Defect semiconductors

[7M + 8M]

UNIT-5

JANUARY 2012

SE

T-1

a. Briefly explain the important characteristics of a good fuel.

b. Explain briefly how the By-product Oven method of producing coke differs

from Beehive oven process.

c. Calculate the gross and net calorific values of coal having the following

composition: Carbon: 87% Hydrogen: 5% Sulphur : 0.5% Nitrogen :

0.5% Oxygen : 3% Ash :4% ; latent heat of steam : 587 cal / gram. [4M + 5M + 6M]

SE

T-2

a. Calculate the calorific value of the coal given the following data:

Wt. of the fuel burnt : 0.945 g Initial temp. : 13.25o C Final temp.:

19.2oC Water in the calorimeter: 1458 g. Water equivalent of the

calorimeter: 144 g.

b. How sulphur present in coal is determined? Is the presence of sulphur

desirable and why so?

c. Briefly explain the production of coke by Hoffman’s process. [4M + 5M + 6M]

SE

T-3

a. Describe the Bomb calorimetric method of determining the calorific value of

a solid fuel.

b. Describe the desirability or otherwise of moisture and ash of coal.

c. Calculate the gross and net calorific value of coal having the following

composition: Carbon : 85% Hydrogen : 8% Sulphur : 1% Nitrogen : 2%

Oxygen : 2% Ash : 2% and Latent heat of steam : 587 cals per gram. [6M + 3M + 6M]

SE

T-4

a. What is calorific value of a fuel? How and why do the higher and lower

calorific values differ?

b. A sample of coal weighing 1.232 g was heated at 105o C for an hour and

the residue weighed 1.186 g. The residue was then heated in a muffle

furnace at 940o C for seven minutes and the residue now weighed 1.126 g.

Finally the residue was heated in presence of air at 750o C till a constant

weight (0.080 g.) was attained. Calculate the results and explain what

conclusions you can draw.

c. Describe the production of metallurgical coke by beehive oven process. [5M + 6M + 4M]

JULY 2011

SE

T-1

a. Write a brief about proximate analysis of coal and its significance.

b. Define calorific value of a solid fuel. How is it determined experimentally

using Bomb Calorimeter?

c. Write short notes on carbonization of coal.

SE

T-2

a. Define calorific value of a solid fuel. How is it determined experimentally

using Bomb Calorimeter?

b. What do you understand by high and low calorific value of the fuels? How is

it determined by the Junker’s calorimeter? Describe with neat labeled

diagram.

SE

T-3

a. Write in brief about proximate analysis of coal and its importance.

b. Name the analysis of coal in which moisture volatile, ash and fixed carbon

are determined. Give significance of each component.

c. Write short note on carbonization of coal.

SE

T-4

a. What do you understand by high and low calorific value of the fuels? How

is it determined by the Junker’s calorimeter? Describe with neat labeled

diagram.

b. Write a brief account of ultimate analysis of coal. What is its significance?

FEBRUARY-2011 S

ET

-1

a. Explain how bomb calorimeter can be used to determine the calorific value

of a fuel.

b. What are the advantages of pulverized coal and what are its limitations?

c. What are the byproducts that are recovered from coke-oven gas and how

they are recovered [7M + 4M +4M]

SE

T-2

a. How are fuels classified? Explain with examples

b. What is proximate analysis of coal? What is the significance of the analyses

c. Describe Beehive oven process of manufacture of coke.

[3M +7M +5M]

SE

T-3

a. Compare the advantages and limitations of solid, liquid and gaseous fuels

b. How sulphur present in coal is determined? Comment on the desirability

of sulphur in coal.

c. Compare the temperature and high temperature carbonization of coal. [5M + 5M + 5M]

SE

T-4

a. Describe the Hoffmann’s byproduct oven process of manufacture of coke

b. A bomb calorimeter whose water equivalent is 144gm, was filled with

1458gm of water. When 0.945gm of coal was burnt in it the temperature of

water rose by 5.95ºC calculate the HCV of the fuel. If the hydrogen

percentage in the fuel was 7 calculate LCV of the fuel ( latent heat of

condensation of steam is 587cal/gm)

UNIT-6

JANUARY 2012

SE

T-1

a. Derive the Nernst equation for the potential of a reduction electrode.

b. Describe the construction of calomel electrode.

c. How is a fuel cell better than a battery?

[5M + 5M + 5M]

SE

T-2

a. Highlight three important applications of electrochemical series.

b. Explain how a concentration cell, using solutions of the same electrolyte but

of different concentrations, works.

c. What are the reactions that take place when Nickel-Cadmium cell is

recharged? [5M + 5M + 5M]

SE

T-3

a. What is single electrode potential? A Nickel electrode (E o = -0.13 volt) is

combined with an Aluminium electrode standard oxidation potential is 1.66

volts) to form a cell. What would be the potential of the cell?

b. Describe the construction of standard hydrogen electrode?

c. Discuss the working of lead storage battery. [5M + 5M + 5M]

SE

T-4

a. Derive an equation for relating the potential and concentration of the

electrolyte for a reduction electrode.

b. What are concentration cells? Explain with an example.

c. Explain how a dry battery functions and what are its limitations. [5M + 5M + 5M]

JULY 2011

SE

T-1

a. What are the different types of fuel cells available? Discuss the principles

involved in the working of hydrogen-oxygen fuel cell.

b. Describe the construction of calomel electrode. Why it is used as reference

electrode in place of standard hydrogen electrode? How potentional

measured using a calomel electrode.

c. Derive Nernest’s equation for single electrode potentional and explain the

terms involved in it. Write its applications.

SE

T-2

a. Write a detailed account of carbon-zinc primary cells with respect to their

construction, cell reactions and uses.

b. Derive Nernst’s equation for single electrode potential and explain the terms

involved in it. Write its applications.

SE

T-3

a. Write short notes on (i) Solar cells (ii) Molten carbonate fuel cells. (iii) Ion-

exchange membrane fuel cells.

b. Write informative note on Lithium cells with special reference to cell

reactions and applications.

SE

T-4

a. Write short notes on (i) Solar cells (ii) Solid-oxide fuel cells. (iii)

Phosphoric acid fuel cells.

b. Describe the construction of calomel electrode. Why it is used as reference

electrode in place of standard hydrogen electrode? How potential measured

using a calomel electrode.

FEBRUARY-2011 S

ET

-1

a. Derive an expression for the potential of a single electrode

Calculate the standard electrode potential Cu++

/Cu, if the electrode potential

at 25OC is 0.296 volt when [Cu

++ ] is 0.015 M

b. Give an account of popularly used batteries indicating the reactions that

take place in them. [8M + 7M]

SE

T-2

a. What is electrochemical series? Explain three important uses of the series.

b. How do the fuel cells differ from batteries? Explain how a hydrogen-oxygen

fuel cell is constructed and what are the electrode reaction that take place.

[6M +9M]

SE

T-3

a. Describe the construction of hydrogen electrode.

b. Explain the working of Lead accumulate

c. What is emf of the following cell at 25ºC

Zn (s) / Zn++

(0.2M) // Ag+ (0.002M) / Ag (s) The standard emf of the cell is

1.54V [7M + 4M + 4M]

SE

T-4

a. Describe the construction of calomel electrode

b. Write briefly about fuel cells

[7M + 8M]

UNIT-7

JANUARY 2012

SE

T-1

a. Explain the terms: (i) Mass defect and (ii) Binding energy

b. Explain briefly how a fission reaction leads to release of large amount of

energy.

c. What functions are served by the moderator and coolant in a nuclear reactor? [5M+5M+5M]

SE

T-2

a. How does the concept of Binding energy explain the stability of different

nuclei?

b. Schematically represent a nuclear reactor and indicate the main parts of it.

c. With a suitable example explain a nuclear fusion reaction. [5M+5M+5M]

SE

T-3

a. Write notes on Mass defect and Binding energy

b. What are the important differences between nuclear fission and nuclear

fusion?

c. Explain briefly how a nuclear reactor works (Figures are not required). [5M+5M+5M]

SE

T-4

a. How do you explain the stability of different nuclei on the basis of binding

energy?

b. Using a line diagram indicate the important parts of a nuclear reactor?

c. Write notes on control rods and moderators used in nuclear reactors [5M+5M+5M]

JULY 2011

SE

T-1

a. What is mass defect. How is it related to the binding energy and stability of

the nucleus.

b. Describe the various components of nuclear power reactor and their

functions.

c. Write a brief note on the disposal of nuclear wastes.

SE

T-2

a. Describe the various components of nuclear power reactor and their

functions.

b. What are nuclear reactions? How they are classified? What is the advantage

of using alpha-particles as projectile to cause these reactions?

SE

T-3

a. Discuss the theoretical principles involved in the generation of power by

nuclear fission and nuclear fusion.

b. Write a brief note on the disposal of nuclear wastes

c. Write short notes on application of radio isotopes.

SE

T-4

a. Discuss the theoretical principles involved in the generation of power by

nuclear fission and nuclear fusion.

b. What is mass defect? How is it related to the binding energy and stability of

the nucleus?

c. Give the Engineering applications of radioactive isotopes.

FEBRUARY-2011

SE

T-1

a. What is binding energy of a nucleus?. Draw a curve between mass number

and average binding energy. Give the salient features of the curve.

b. What is meant by mass defect? How do you account for the mass defect of a

nucleus? [7M+8M]

SE

T-2

a. Explain the principle and working of a nuclear reactor with the help of a

labeled diagram.

b. Explain nuclear fission and fusion with two examples.

[7M+8M]

SE

T-3

a. What is nuclear fission? Give an example to illustrate it. Find the energy

liberated in the nuclear fission of 92 U 235

b. Explain the principle and working of Breeder reactor

[7M+8M]

SE

T-4

a. In a nuclear reactor what is the function of (i) moderator (ii) control rods

(iii) coolants (iv) protective shielding

b. Distinguish between nuclear fusion and fission.

[8M+7M]

UNIT-8

JANUARY 2012

SE

T-1

a. How do the photovoltaic cells work?

b. Describe how the solar power plants are used to harness solar energy.

c. Explain the reasons for the green house effect felt by earth.

[5M + 5M + 5M]

SE

T-2

a. Write a short note on solar thermal power plant’s working.

b. What is green house effect and what are the advantages and disadvantages of

the effect.

c. What is the basic principle of solar cells? [5M + 5M + 5M]

SE

T-3

a. Explain how solar energy can be harnessed by using pv cells.

b. Write notes on solar collectors.

c. What are green house gases and how do these gases produce green house

effect? [5M + 5M + 5M]

SE

T-4

a. Heating water on large scale with solar energy is becoming very popular.

How is this achieved?

b. Write a short note on solar panels.

c. Explain green house effect and suggest methods to control this. [5M + 5M + 5M]

JULY 2011

SE

T-1

a. Discuss the use of solar energy for space heating, water heating and for

production of electricity.

b. What is meant by green house effect? What are its consequences? Give two

examples of green house gases.

SE

T-2

a. Discuss the use of indirect solar energy for generation of electrical power.

b. What is meant by green house effect? What are its consequences? Give two

examples of green house gases.

SE

T-3

W rite informative note on the following (i) Flat plate solar collectors .

(ii) Photovoltaic cells (iii) Solar trough collectors (iv) Solar energy for

producing fuel for vehicles

SE

T-4

a. Discuss the use of solar energy for space heating, water heating and for

production of electricity.

b. Discuss the use of indirect solar energy for generation of electrical power.

FEBRUARY-2011 S

ET

-1 a. How is global warming taking place? What are its effects? Suggest ways to

prevent global warming.

b. Write a note on the following: (i) PV – cells (ii) concentrating solar

power plants [7M+8M]

SE

T-2

a. Explain how solar energy can be converted into electricity in solar thermal

power plant systems.

b. What do you understand by green house effect and how it affects mankind?

[7M+8M]

SE

T-3

a. Write the advantages and disadvantages of solar energy.

b. How can you prevent green house effect by growing plants?

c. Ozone is a pollutant and protector to the environment. Discuss.

[5M + 5M + 5M]

SE

T-4

a. How is global warming taking place? What are its effects? Suggest the

ways to prevent global warming.

b. Write notes on (i) PV – cells (ii) concentrating solar power plants

[7M + 8M]