Madras Christian College, UG Chemistry Question Papers

MADRAS CHRISTIAN COLLEGE (AUTONOMOUS)B.Sc. DEGREE END oF SEMESTER EXAMINATTONS -Nov z0r2

' GENERAL COURSE0 9 l r l A N

CHEMISTRY IN EVERYDAY LIFE

TIME : 3 HOURS SEMESTER : ONE MAX : 100 rnarks

PART _ AAnswer ALL the questions. I l0 x 2:20 |

l. Define air pollution.2. What is hard water?3. What are antipyretics? Give an example.4. What are ceramics?5. What is the composition of Portland cement?6. What is PVC? Draw its structure.7. What are building blocks of proteins? Give any two significances of

proteins as food constituents.8. What is scurvy?9. Give the composition of super phosphate of lime.10.What are soaps?

PART - BAnswer any FIVE questions. I5 x g - 40 l

I l. Explain the causes and consequences of air pollution. | 4+4 )

12. Give an account of detergents. t g ]

13. Write about the general formulation and preparation of shampoos andper fumes. t4+41

14. Differentiate between natural and synthetic fertilizers. t g ]

15. Describe the cladsification of explosives with suitable examples. t 8 ]

16. write two ekamples and two applications of a acid, basic, mordantandva tdyes . t a t+2+21

17. Give the preparation, structure and uses of bakelite. t g ]Continued in Paee 2

'P,agp 2

I

B.Sc. Chemistry in Everyday Life ....

18. Discuss hazards of the use of cosmetics.

PART - CAnswer any TWO questions. 1 2 x 2 0 = 4 0 1

19. (a) Give the principle and uses of fuel cells. t 5 l

(b) Explain the classification of fuels with suitable examples. t r0 l

(c) Write a note on NPK ratio. t 5 l

20. Give the sources and physiological importance of fat and watersoluble vitamins.

21. Write short notes on the following :(a) Photosynthesis(b) Tooth pastes(c) Analgesics(d) Polyesters

[ 1 0 + 1 0 ]

[ 4 x 5 : 2 0 f

{ . * {€ r l . r l€* * * * *

MADRAS CHzuSTIAN COLLEGq (AUTONOMOUS)B.SC. DEGREE END OF SEMESTER EXAMINATIONS -NOV 2OI2

Gr,(iv) ChemistryT 5 I T i A N i

I BASIC CHEMISTRY _ I

MAX : 100 marks

[ 1 0 x 2 = 2 0 1

TIME : 3 HOURS SEMESTER: ONEPART _ A

Answer ALL the questions.

1. Define electron affinitY.2. Calculate the equivaleirt weight of sulphuric acid.3. What is photoelectric effect?4. State Pauli's exclusion principle.5. $tate Fajan's rules.6. Define hybridization.7. What is lattice energY?

r l

8. NaCl lattice is more stable than CsCl lattice. Why?g. What is the difference between semiconductor, conductor and

insrilator?10. Density of solid state water (ice) is less than that in the liquid state.

lvhy?PART _ B

Answ$r any FIVE questions.1 1. Define ionization energ\

[ 5 x 8 : 4 0 Iine ionization energy. What are the factors that affect the

ionization energy?

Write a short note on periodic trends in covaletrt ladii.

Discuss the hybridization and shape of SFo.

,Calculate bond order of Oz* and 02- based on MO theory.

Draw and explain Born - Haber cycle.

What is inter and intra urolecular hydrogen bonding? Explain rvithone example fbr each.

Draw and explain the MO diagram of Nz.Continued in Page 2

t 2 .

r 3 .

t 4 .

1 5 .

1 6 .

Page 2

B,Sc.(iv) Basic Chemistry - I

18. How are p and n - type semiconductors prepared?

PART - CA4swer any TWO questions. 1 2 x 2 0 - 4 0 I

I

19. (a) Draw tlrc MO diagram ol'CO rnolecule and determine the bondorder. i' . i i

1 , , , "(b) Explain Schottky and Frenkel defects with examples.

(a) Draw and explain the crystal structure of NaCl.I

20.

2 r .

(b) Explain the shape and hybridization of PCl5 and IFz on the basis ofVSEPR theory.

t

(a) Discuss the significance of.four quantum numbers., l

(b) State the postulates of VB theory.

(c) what are tlre differences between vB theory and Mo theories? [5 ]

[ 1 0 ]

t l 0 l

[ 1 0 ]

t 1 0 l

I l 0 ]

t s l

* * rF:F:l€ * t< {.:k:f

Page 2

B.Sc.(iv) Basic Chemistry - I

18. How are p and n - type semiconductors prepared?

PART - CAr1swer any TWO questions. 1 2 x 2 0 - 4 0 1

' e

19. (a) Draw tlrc MO diagram ol'CO molecule and determine the bon<Jor{3r

1 -I

(b) 'Explain Schottky and Frenkel defects with examples. t l0 l

(a) Draw and explain the crystal structure of NaCl.I

20.

(b) Explain the shape and hybridization of PCls and IFz on the basis ofVSEPR theory.

t

t 1 0 l

[ 1 0 ]

I t 0 ]

t s l

2 t . (a) Discuss the significance of.four quantum numbers.. l

(b) State the postulates of VB theory.

(c) what are tfre differences between vB theory and Mo theories? [5 ]

* * * : f * * * * * *

ry l r l AN

TINp :3 HOURSI

r i

: ^ i'*y4pl4! cHRrsTr4,N coLLEGE (AuroNoMous)B.Scl DEGREE END oF SEMESTFR EXAMINATTONS -Nov 20t2

Gr.(iv) Chemistry

BASIC CFIEMISTRY _ II

SEMESTER: TWOPART _ A

MAX I 100 marks

[ 1 0 x 2 = 2 0 1Aniwer ALL the questidrns.

i

l. At what temperature is the kinetic energy of the gas becomes half ofi its value at327oC.

I l

2. The molar volume of a gas at latm. pressure and 500K is', 50.25 x l0

-3,m3. calcurate the compressibility factor of the gas.

1 What are liquid crystals? Give an example.i

I What are Miller indices?

5. Mention any two conditions for using a metal ion indicator incomplexometric titration,

6. Distinguish co - precipitation from post precipitation.I

l. Draw the conformers of cyclohexane.i

q Give the IUpAC names of the following :

i cH3i I

r'3 cH3r r _ l; ( a ) C H r - C - C H - C H 2 - C H 3 ( b ) C H 2 - C - C H _ C H 3i l l ri H CH2_ CHz, CH: iH, _ CHz _ CH:

!t D-Jfferentiate tetween enantiomer and diastereomer.10. Write a note on Walden inversion.

PART - BAnswer any FIVE questions.

1 1. State the postulates of kinetic theory of gases.

[ 5 x 8 = 4 0 ]

Continued in Page 2

Page 2

B.Sc.(iv) Basic Chemistry II . . ...

12. State the law of corresponding states. Deduce the equation for law ofcoffesponding state

13. Discuss various types of symmetry in crystals. i

14. Explain any one theory of indicators.

15. How will you get the following from benzene.(a) Xylene (b) diphenylmethane (c) Benzenehexachloride

16. Explain the mechanism of El andE2reactions.

17. Explain the reaction of pyrolysis on +(a) Propane (b) ethylacetate (c) [CH3CH2CH2N(CH3)3]OH-

18. (a) What is E - Z nomenclature?

(b) Assign E - Z configuration for the following :

(i) clH2c\.

= ,r"''

(ii)

/ \

F

C : C

H

Br

\CI

CHr

C : C

H

cH2ct

CH:H3CH2C cH2cH3

PART _ CAnswer any TWO questions.

19. (a) Explain Maxwell's distributiori of molecular velocities.

,(b) \ilhat is critical phenomenon? Derive expressio$ for the critical

; bonstants of a gas ubing v4nder walls equation of state.[ 1 0 + 1 0 ]

Continued in Page 3

12 x20 - 40 I

i

P A s e ?

B.Sc.(iv) Basic Chemistry II ..,..

20. (a) Derive Bragg's equation.

I (b) Explain the following :(i) Specific and selective precipitants(ii) Sequestering agents(iii) Nucleation

I

I

?t.(") Explain various conformational isomers of the following andI explain their stability.

(i) ethane(ii) n - butane

(b) Explain the mechanisms of(i) SNl reaction (ii) Sy2 reaction

[ 1 0 ]

t 4 lt 3 lI 3 l

t 4 lt 6 l

I s + s ]

* { . r r rF** * * *

MADRAS CHRISTIAN COLLEGE (AUTONOMOUS)B.Sc. DEGREE END OF SEMESTER EXAMINATIONS -NOV 2012

Gr.(iv) Chemistry1 5 I I I F N

CFIEMISTRY OF NON METALS

TIME : 3 HOURS SEMESTER: THREEPART _ A

Answer ALL the questions.

MAX : 100 marks

[ 1 0 x 2 = 2 0 1

1. What is an ionic hydride? Give an example.2. Define : Permanent hardness of water.3. Describe the preparation of carbon suboxide.4. Give the importance of silicon carbides.5. Which is a strong base among the following? Why?

(a) PH3 (b) NHs (c) AsH36. Write the structure of HzNzO+.7. What are polyphosphates?8. Give two uses of bismuthates.9. What are freons? Give one example.10. What are pseudo halogens? Give two examples.

PART _ BAnswer any FIVE questions. [ 5 x 8 - 4 0 ]

11. Explain how hardness of water is removed by ion - exchange resin.

Which is called inorganic berzene? Why? Give its synthesis.

How are silicates classified? Give an example for each class.

14. Give any four reactions to illustrate that liquid ammonia can get as asolvent.

Write a note on any fwo oxy acids of phosphorus.

How are Caro's acid and Marshall's acid prepared? Give twochemical reaction for each.

Write any one preparation for each of the oxides of arsenic,antimony and bismuth.

Continued in Paee 2

12.

13.

1 5 .

16 .

17 .

Page 2

B.Sc.(iv) Chemistry of Non Metals. . ..

18. Write a note on inter halogen compounds.

PART - CAnswer any TWO questions.

19. (a) How will you estimate the hardness of water?

(b) Explain in detail the structure of diborane.

12 x20 = 40I

[ 1 0 ]

[ 1 0 ]

20. (a) Give a comparative account on hydrides of nitrogen.

(b) Discuss the following (i) Oxyhalides of Phosphorus.(ii) Nitrogen cYcle.

21. (a) Discuss the allotropic forms of phosphorus.

(b) Give a brief account of Se and Te.

(c) Discuss the fixation of atmospheric nitrogen.

[ 1 0 ]

[ 1 0 ]

t s l

t 5 l

[ 1 0 ]

,k ,F,* ,1. * * tS tF tk t& tl. ,F {€

MADRAS CHRISTIAN COLLEGE (AUTONOMOUS)' B.Sc. DEGREE END oF SEMESTER EXAMINATIONS -Nov 2or2

" Gr.(iv) Chemistryt 2 l r l F N

ORGANO OXYGEN CFIEMISTRY

TIME :3 HOURS SEMESTER: THREE MAX : 100 marks

PART A

Answer all questions: ( 1 0 x 2 = l Q )

1. The boi l ing point of glycerol is very high(290i 'C).G ive reasor: .2. How wi l l you convert acetyl chlor ide into pyrwic acio ?3. What is ester i f icat ion?Give an example. .4. Explain the term metameris.r , r . r i th a sui table example.5. How wi l l you dist inguish 2-pt:r tanone and 3-pentanone?1,. H. .r i is a.ce:cpheroneprepared?7. y, .v is i ' ;1: i -3p6snolcal led picr ic acid though i t has no carboxyl ic acid group?8 N4esc iar:aric acid is optically inactive.Why??. l \ /ha: is saponif icat ion?

1o- p-ni tro benzoic acid is more acidic than benzoic acid.Give reason.PART B

Answer any five questions:

1,1. How does glycerol react raiith

] . t Oxal ic acid at Z6OrC b)p2os c)Ht d)Conc.HNO, 2

1[. a)What is Hoffmann bromamide reactiorl?Give its mechanism. (6)

i b)Acetyl chloride is a better acetylating agent than acetic anhydride.why? (2)I

18. a)Explain the base catalysed mechanism of hydrolysis of ester, (6)j b)How will you convert acetyl chloride to ethylacetate? (2)

14. V\lrite notes on a) Zeisel's method b) Waxes and fats.

1$. Discuss the mechanism of the following rearrangementsa)P inaco l - p inaco lone b) Fries

1p. Arrange the following in the increasing order of acidity and give reasonchloro acetic acid, fluoro acetic acid, acetic acid and formic acid

p _

( 5 x 8 = t f ! )

17. How are the following synthesized?a)ci tr ic acidc) catechol

: ? ' .

b)sal icylaldehyded)an iso le

Atct ,18. a)phenol+ C.H:.COC| )A --------> B + C

What are A, B and C.Give suitable reactions. (5)b)How wiil you prepare the following from acetic acid? {3)

i ) f o rm ic ac id i i )acetone

PART C

Answer any two questions: ( 2 x 2 0 = t C I )

l3.aic ve en er.:mpie for the foilowing name reactions. (5 x 3 = 15)' ) , {ra/1-f ;ster: react ion i i ) Bouveault _ Blanc reduct ion'i,) Rosenrn,nd reduction iv) Tischenko reactionv) Hel lVofhard Zel insky react ion

biHorv wi l l you dis: inguish the fol lowing?i) acetaldehyde and acetone i i ) 1_ propanol and 2 _ propanol

2i'a)Fse1 is sceto acetic ester prepared.How will you synthesise the following from it?i) succinic acid i i )y ketovaler ic acidi ; i iethyt methvl ketone iv) crotonic acid ( 2 * 8 )

: i Somplete the fol lowing react ions. ( 5 x l = 1 6 1

Zn) C. H-CHO + BrCH:COOC,H ______>

;i) Resorcinol + phthaiic anhydride + conc. H,SO, )i i i ) Malonic es,ter + trrea )i r , ) Acro le i r r . Hgt )v ) A l l y la lcoho l+ O: )

21' C.omplete the following reactions indicating against each name of the reaction and suggest

a sui table mechanism. ( .4 x 5 = 20)

i) 2C*H.CHO + aq.alc.KCN )ii) (C;H5)2C=NOH + HrSOo )'i;i) 2c"H_rcHo + NaoH )iv) CoH5ONa + CO; )

MADRAS CHRISTIAN COLLEGE (AUTONOMOUS)B.Sc. DEGREE END OF SEMESTER EXAMINATIONS -NOV 2012

Gr.(iv) Chemistry2 0 I T l F N

NUCLEAR CI{EMISTRY

TIME :3 HOURS SEMESTER: THREEPART - A

Answer ALL the questions.

l. Define packing fraction.2. What are a metastable nuclei?3. Give any two uses of isotopes.4. What is nuclear transmutation? Give one example.5. Define 'critical mass'.6. Mention the types of nuclear power reactors.7. What are thermonuclear reactions?8. What are transuranium elements? Why are they called so?9. Define radiocarbon dating.I 0. Differentiate between natural and artifi cial radioactivity.

PART - BAnswer any FIVE questions.

11. Elaborate on the liquid drop model.

12. Describe the following with examples :(i) fissile and fertile material and(ii) nuclear isomerism

[ 5 x 8 - 4 0 I

13. What are the ways in which fission energy is released? Explain usingsuitable example.

14. Explain the fusion reaction in stars.

15. What is nip ratio and how does it explain nuclear stability?

16. Write a note on scintillation counter.

17. How are radioisotopes used in agriculture?Continued in Pase 2

MAX : 100 marks

[ 1 0 x 2 = 2 0 1

Page 2

B.Sc.(iv) Nuclear Chemis$ ....

18. Explain orbital electron capture.

PART- C

Answer any TWO questions. 12x20=401

19. (a) What are the different types of nuclear wastes? How can they be

20. (a) What is radioactive disintegration? Derive an expression for the

effectively disposed?

(b) Explain the working of a breedor reactor.

rate of disintegration of a radioactive material.

(b) Explain the working of a GM counter.

[ 1 0 ]

l t 0 l

[ 1 0 ]

[ 1 0 ]

2L. (a) Write note on the different methods of separation of isotopes. [10]

(b) What are subatomic particles? Explain their properties. tl0l

* * r f * * * * ' l €

MADRASCHRISTIANCOLLEGE(AUTONOMOUS)B.SC. DEGREE END OF SEMESTER EXAMINATIONS _NOV 2OI2

Gr.(iiD (va) (vi)

$ l t l F NALLIED CHEMISTRY _ I

TIME : 3 HOI-]RS SEMESTER: THREE MAX : 100 marks

PART _ A

Answer ALL the questions. [ 1 0 x 2 = 2 0 1

1. write the electronic configurations of chromium and copper'

2. What are the geometries of PCls and IF5?

3. What are three major operations involved in the extraction of metal

from its ore?4. Write the primary and secondary valency of the metal in the complex'

[Co(NH3)o]C1:. r , 7--r i t -^+.5. Give any two indicators employed in acid - base and redox titrations'

6. What is the co - ordination number of atom is b.c.c. and h'c'p'

alTangements?7. Give the average composition of water gas'

8. How triple pho-sphate is prep ared? Give the chemical reaction'

9. What happens *lt.n furan is treated with maleic anhydride? Give the

reaction.10. Draw the enantiomers of tartaric acid'

PART. B

Answer anY FIVE questions' [ 5 x 8 = 4 0 ]

11. State and explain Pauli's exclusion principle and Hund's rule of

maximum multiPlicitY.

12. Explain the process of heat treatment of steel'

13. outline the salient features of Pauling's theory of M - L bond'

14. Explain the manufacture of Portland cement'

l5.Discuss the geometrical isomerism in four co - ordinated complexes'

Continued in Page 2

Page 2

B.Sc.(iii) (v) & (vi) . . .. Allied Chemistry I . ...

16. How will you prepare the following ?(i) Ammonium sulPhate (3)(ii) Ammonium Nitrate (3)(iii) Potassium Nitrate (2)

17. Explain the mechanism of Beckmann reaffangement with suitableexample.

18. Compare the properties of maleic acid and fumaric acid.

PART- CAnswer any TWO questions. 12x20=40 1

19. (a) Explain the structures of NaCl and CsCl with neat diagrams.

(b) Draw the structure of the following :(i) CFI4 (ii) CzI{z (iii) BF3 (iv) HzO (v) IF5

20. (a) What is meant by chelation? Give any two chelating ligands and

three complexes with chelating ligands. 12 + 2 + 3l

(b) Explain the applications of chelates.

(c) Write a note on applications of solubility product is qualitativeanalysis. t 5 l

t 8 l

21. (a) Give the composition of producer gas.

(b) Explatl rh" manufacture of glass.

(c) Give the preparation and properties of pyridine'

(d) Explain the terms 'electrophile' and 'nucleophile''

t 4 l

t s l

t s l

[ 3 + 3 ]

* * * * * * { <

MADRAS CHRISTIAN COLLEGE (AUTONOMOUS)B.sc. DEGREE END oF SEMESTER EXAMINATIONS -Nov z0r2

l 2 / l r F NGr.(iv) Chemistry

ORGANO OXYGEN CHEMISTRY

TIME : 3 HOURS SEMESTER: THREE MAX : 100 marks

PARTA

Answer all questions: ' ( 1 0 x 2 = ! Q |

1. The boiling point of gryceror is very high(290i'c).Give reason.2. How wi l lyou convert .acetylchlor ide into pyrwic acid?3. What is ester i f icat ion?Give an example.4. Explain the terr ,n metamerism with a sui table examole.5. How wi l l you dist inguish 2-pentanone and 3_pentanone ?6. How is acetophenone piepared?7 ' Why is tr in l t rophenol cal led picr ic acid though i t has no carboxyl ic acid group?

. 8 Meso tartaric acid is optically inactive.Why?9. What is saponif icat ion?

10. p-nitro benzoic acid is more acidic than benzoic acid.Give reason.PART B

Answer anv five questions:| . ns r rqns : , (Sxg={e}

11. How does glycerol react with q

a) .

Oxalic acid at 260'rC b)lro, c)Hl d)Conc.HNOl ?| ' '

. 1 . ' "

i l , i , I ,12. a)Jvhat is Hoffmann bfomamide 'eaction?Give its mechanism. (6)

biAietyl chlorirde is a better acetylating atent than acetic anhydride.why? (2)

i '18'a)Explain the base catalysed mechanism of hydrolysis of ester, (6)

i b)How will you convert acetyl chloride to ethylacetate? (2)

I14. Write notes on , a)Zeisel 's method b)Waxes and fats.

15. Discuss the mechanisrn of the following rearrangementsa)P inacc i l -p inaco lone ; b) Fr ies

16. Arrange the folloi,ving in the increasing order of acidity and give reasonchloro acdtic acid, fluoro acetic acid, a-cetic acid and formic acid

l tI

e .

17. How are the fol lc iwing synthesized?a)ci tr ic acidc) catechol

' 9 '

b) sa l icylaldehyded)an iso le

Atct .18. a)phenol + C,.H:.COC| +A -------> B + C

What are A, E and C.Give suitable reactions. (5)blHow willyou prepare the followingfrom acetic acid? (3)

i) formic acid ii) acetone

PART C

Answer any two questions:

19-a)Give an exarnple for the foliowing name reactions. (5 x I = 15yi) Arndt-Eisterr reaction " ii) Bouveault - Blanc reductioni i i )Rosenmundreduct ion iv)Tischenkoreact ionv) Hell Voihard Zelin_sky reacrion

b)Hoiv wi l l you dist inguish the fol lowing?i) ecetaldehyde and acetone . i i ) 1_ propanol and 2 _ propanol

20.alHciw is aceto ac:er ic ester prepared.How wi l l you synthesisei) succinic acid i i )y ketovaler ic acidiii)ethyl merhyl ketone iv) crotonic acid

( 2 x 2 0 = 4 0 )

the fo l lowing f r c i r r i t?

( 2 + 8 )

b) Complete the fol lowing react ions. i 5 x l = 1 6 1

7n:i) C,H.CHO + BrCH;COOC;H: ----->

ii) Resorcinol + phthalic anhydride + conc. H2SOo )iii)l Malonic ester + urea )iv i

'Acrolein + HBr ) i

"i iirrii'."i.iif,r ',

, ' :r j

21' c':niplete the following reactions indicating against each name of the reaction and suggest

a'su,i table mechanism. (4x 5= 20)

i) 2C6H:CHO + aq.alc.KCN )i i) (C*H5)2C=NOH:r HzSOo )it i) .2C^H_qCHO + NaOH )iv) C,,H..ONa + COr )

: l

MADRAS CHRISTIAN COLLEGE (AUTONOMOUS)B.Sc. DEGREE END OF SEMESTER EXAMINATIONS -NOV 2012

INTERDI S CPLINARY COURSE0 9 I I l F N

BIOLOGICAL CI{EMISTRY

TIME :3 HOURS SEMESTER: THREE MAX : 100 marks

PART _ AAnswer ALL the questions. [ 1 0 x 2 : 2 0 7

1. Write the Haworth ring structure of sucrose.2. How do you convert glucose into ozasone?3. Define isoelectric point.4. How are aminoacids classified?5. Define iodine number.6. What is saponification reaction?7. Write the structure of two pyrimidine bases of DNA.8. Define : 'Genetic Code'.9. What are vitamins? How are they classified?lO.Enzymes are more specific in catalytic activity. Justiff.

PART - BAnswer any FIVE questions. t 5 x 8 :40 ]

11. Write the structure and properties of maltose.

12. How are proteins classified on the basis of composition?

13. What are lipids? Explain the types of lipids with suitable examples.

1 4. Differentiate nucleosides from nucleotides.

15. Explain the biological functions of DNA.

16. Give an account on urea cycle.

17. What are enzymes? Mention their sources. How are the enzymesclassified?

Continued rnPage 2

Page 2

B.Sc.(iv) Biological Chemistry. . ..

18. Explain Edman's method in N - terminal amino acid analysis ofproteins.

PART _ CAnswer any TWO questions. 12x20 - 40 l

19. (i) Give an account on glycolysis of carbohydrates.

(ii) Bring out the similarities and differences between starch andcellulose.

[ 1 0 + 1 0 ]

20. (i) Differentiate RNA from DNA.

(ii) Explain the biological functions of RNA.

(iii) Write a method of determination of the C - terminal of proteins.

[ 6 + 6 i - d t

21. (i) Explain the various factors that affect enryme activity.

(ii) Write the sources and diseases caused by deficiency ofvitamin 41, 81,B2 , C and D.

* * * * * * { < *

MADRAS CHRTSTTAN COLLEGE (AUTONOMOUS)

B,Sc. DEGREE END OF SEMESTER EXAMINATIONS - NOVEMBER 2012

Gr (iv) CHEMISTRY SEMESTER FOUR

CLASSICAL TH ERMODYNAM ICS

Time: 3 hoursobl t t Ahl

I

PART A

Answer ALL the questions

Max: 100 marks

( 1 0 X 2 = 2 0 m a r k s )1 Define intensive and extensive variables.

2 State the zeroth law of thermodynamics.

3 What is standard state?

4 What is enthalpy of neutral izat ion?

5 Wri te down the Gibbs-Duhem equat ion.

6 Write down the units for AG.

7 What is a homogeneous system?

8 Give the expression for Ko for the dissociation of pCls.

9 State Raoult 's law,

10 What is van't Hoff factor?

PART B

Answer anv FIVE questions ( 5 X 8 = 4 0 m a r k s )11 State and explain the f irst law of thermodynamics.

L2 a) Derive the relation between Co and Cu for an ideal gas.b) Write a note on inversion temperature.

(4+4)

. . . . . . . . con td .

Page I of /

BSc (iv) CLASSTCAL THERMODYNAMTCS .....

13 a) Derive Kirchhoff equation.o) Write a note.orplring"Oilr," solutions with gaseous systems.

(4+4)

14 How does entropy change on isothermal rnixing of ideal gases?15 How does chemicar potentiaf vary with temperature and pressure?

16 Derive the van,t Hoff eguation.

17. Calculate AGI00. commr:j 1995 for an equitibrium whose

rB How is osmor:

on the spontanc pressure ,"",";:T;;;#

#'ff:uilibrium constant is

. ,oon'Yu'unu "o

or"r 'on, PART c

lY (a) Derive ec

(b) ifi:tTi:fii,,?;:: dU and dH ror "" f,il::,:l""fi,o*,0,

t"rpuiJt?u'Ju" energy vary with pressure, vorume and20

,t;i fl:.T,': n:fi:ffiil!,,.,";,.,, heat surnmation27

,';i SfJ;:: Il^:.: cha'ier - Br0 " i".,i, " 1?[ ii? i:i::il ft:, hT!,'i 3' i;, ", h e, p s i n t h e

(1s+s)

(10+10)

X ---- X

Page 2 of 2

MAPRAS CH RISTIAN COLI.ECDE CAUTDNOVOUS)

B.sc' DE&REE- END oF SEMESTER ExAMtNATloNs NovarqBER_ 2Dt2

Gnoop lV cHEtvtfsrRy

PHYSICAL METHODS 4 CTTEMICAL CONSTITOTION

Drre: 16 l r r 4JTtq e: B Houva

sav'srER : l=ot-:R'

panr - AAnsr^rov ALL tho iuoafio,..,a

Ee=p\ain qnq twro c.h".rac-\-.n ah es

Defina bi.l.u"F i. conaf.nF'.

SugTecr 4.oDE : Bcog

lvla:c : loo, Marks

tt ox2=.2o1

'lhz.dipo\annornan\- q P-dich\orcbenane. is hrctrrrhe.ra aa tbot_

dt p-drh6d..*A ga6za\1L is I .64 D . Erephr n .

6\ d,o-o6no}i. Arrbaf,e neoA.2 .

7

4 -

5 .6 .

1 .

8 .

frtznfion th,e- dr15c-r-t\tica inlhr- rr6a $neuhrrsrr drSracficn Fo.hnilrratrhaF is maXneFic permco,U'\i+l ?\NbaF inf--XHo" can 5- oblaineJ b1 -DTA thaF ratnrroF b.

obhainzd bE T614 ?ca\c.trlah. th;.*yt a't:ocio.F,.d t r\tt^, phohon q trAhF t^nvin6 q

1u1ua\a-n6tn 6ooo A Lh =A.62A* risf kA#a' ]

'In$ro rod and Rannan apec-hra oyz- .*npl.rn"rrF^r1 +" e-a.h cth"v.Exp\oin.

q . Exp\ain th" onqtn q Ese spadnd$c6\% .lo. Hrato nn^l.A Feaka a:r.l_ 4ecY4 {or SlAn 6\DacFrclm $

-th* acothte. I ?rcdi& tt^. {.ela.huc \n\znai\ro'a5th.- pe-aka.

PART-BAnor re-v anH FtV e 1t'-oHcrra ls x8 =4o J

Expla.\n tt. pXn.*p\" inuo\u.d in tl* d.Forrnino.ficr, 6tdipo\e-rr,oroe",F bX q) th. tern\c.ra,t^r.e- rnatHod

\r b> sPehrcc$cn '

Descrrba t rr',pol-,tful^e- {apond.nF qnd h.- pat.'h-tr- inJepndon h

paro.naqna\rsrn ,

S''r=t\l- .r;a E-x p\c.\ n frco& &*i..srl $1+rlrib'' e- -

t 2 "

arptain tF- TGIA cuyue .=F.t-"d 6n heahn:

in a.ir 'rn th,. *"ff 3o - tooi. a

advan*ffo q uaing TMs aa a.ninl-ov.ol

t6 ilffi.,iil:|t1*f'*'oA

-t.R ap.hrrs"{"6 inttr-.f.^{ ql7' e nltaf ft\. rra.riHu applic-a{rcqa q th. narrhrarr di,$\rachon

rnelhodt6' rr,.ShqFis moonF bg tho torrn c.hernico-\ ,s\if ? DeEcrrba th.

$a-chora us,t.h in{turancp- lf-tz ahamical shi}+ vatr.ro.

Anstrra PART- c

tq a) ,*j^,:aJ:r 1''"HdnE czxso = 40 rna'rka)

tt yT).eq,6uy^e tt^4

**E m'e-\bod u'6e^d

br Explar\n rno* "ilT:*iffiI"?-"

ayc_.helPt.I

\n corrtir-, %.

ahruchurzs % c-o om4inqlioo c.crnpogda.c) Exp\crin th. p"""ifl\. Frauhnsrr Ji.6.,-chon td["r1*.

2b a) Diacum th. .F.hora thop q{F+ rh"rTJA";!?;"b2 Diacuao tu*- app\icatr.na db l?arnan lp.r.o4Xe) D\bc'66 varr6u6 F":aibl<- .l-rzanai{rorra occ-urina in th"

U'v' "?.srt' cs+ ro+,.) a2I

l*:H, Lffit*-; ^ffi *ffii c'a:t]flatah. tb,. \*hJoro*,f,J \*r*nt intt,- Te,_ A Pti*, ,.Ai.Y., -{.v c=@tft : r2,5 *,[!aqnaD .-, J

afro-t"hti vlbt='lior

c) )ibcur,r tr^- p*Yap\- i Nr,4 R ,bp.cF66cspa[ ++ a++l

t4 .

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sk"l-ch qnd

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toha.F ayz- th.SFond4xd 2

MADRAS CHRISTIAN COLLEGE (AUTONOMOUS)B.SC. DEGREE END OF SEMESTEREXAMINATIONS _NOV 2OI2

Gr.(iv) ChemistryT 9 I T l A N

INTRODUCTION TO NANO CHEMISTRY

TIME:3 HOURS SEMESTER: FOUR MAX : 100 marks

PART - AAnswer ALL the questions. [ 1 0 x 2 = 2 0 1

1. Mention the significance of lithographic technique in nano chemistry.2. How is SAM prepared?3. Mention any one method of preparation of titania.4. Give any one method of preparation of gold nanoparticle.5. Define nanosensors.6. Mention the significance of electro chemical sensors.7. State the principle of field on microscopy.8. Name any two experimental techniques used to view the morphology

of the nanomaterials.9. Mention any two applications of nanomaterials.10.How is the sample prepared for SEM analysis?

PART - BAnswer any FIVE questions.

1 1. Write a short note on MEMS.

[ 5 x 8 = 4 0 I

I2.Explain any two methods for the preparation of iron oxide.

13. Discuss the principle of nanosensors based on optical properties.

14. How is polyion film prepared using sequential adsorption process?

15. How is reduction technique used for the preparation of nanoparticles?Give an example.

16. Discuss the principle and applications of SEM.

Continued in Page 2

Page 2

B.Sc.(iv) Introduction to Nano Chemistry. . ..

17. Describe sol - gel method. Mention the principle and advantages ofsol - gel method.

18. Discuss the principle of polypeptide nanowires.

PART- CAnswer any TWO questions. 12x20-40 I

19. Describe the principle, instrumentation and usefulness of TEM.

20. Discuss the importance of the following :(i) protein nanoparticles.(ii) multilayer films.(iii) Goldnanoparticles.

21. Write short notes on(a) Working principle of STM. [ 10 ](b) Evaporation and sputtering technique for the

preparation of nanoparticles [ 10 ]

* * * * * * * *

MADRAS CHRISTIAN COLLEGE (AUTONOMOUS)B.sc. DEGREE END oF SEMESTER EXAMINATTONS -Nov z0r2

0 8 / 1 1 F N(iv) Chemistry

ORGANO NITROGEN CHEMISTRY

TIME :3 HOTJRS SEMESTER: FIVE MAX : 100 marks

PART _ AAnswer ALL the questions.

I l0 x 2 = 20 ]. l. Nitro alkanes are soluble in sodium hydroxide. Why?

2. predict the producti) AlkylNitrile on catalytic hydrogenationii) Alkyt iso nitrile on catalyic hyjrogenationWhat is Benzidine rearangement?Define isoelectric point.Pyridine is more basic than pyrole. Whv?What is transcription?

-

Arrange the following compounds in the decreasing order of basicity and exprain.NH3, CH rNHz r (CH:)r N, (CH3)2 NHWhat is carbylarnine reaction?What is denaturation of protein?Give two colour reactions for identifichtion of proteins.

PART - B [ 5 X 8 = 4 0 ]

Answer any FIVE euestions

I l. How will you distinguish the following compounds Nitrousacid[ 4 + 4 ]i) Aniline, N-methyl Aniline, N,N_ dimethyl Aniline

ii) Primary, Secondary and Tertiary nitro co_pounds12. a) what is H.fmann' Bromamide reaction? Give iis mechanism. t 5 ]b) what does the secondary structure ofprotein dear with? [3]13. How will you convert Aniline to 14 x2: gl

i) Benzonitrileii) Flouro benzene iiii) Iodo benzene

\ . lv) , Bromo benzene14' (iive one method fdr the deteiminatign of N- terminal and c- terminal end of aprb te in . 14+q l15' Describe the structure of DNA. what is its function? [ a + 4 )

.,-. p,. . .

Page 2

B.Sc.(iv) Organo Nitrogen Chemistry ' ' "16. Expiain Skraup sytil'esis of Quinoline. Why does Quinoline undergo

Electrophilic suUstitution at 5,8 positions? 16 + 2l

17. What haPPens when Urea is,(i) heated gentlY,(ii) heated at 170oC,(iii) treated with excess HCHO'(iv) treated with hYPohalite and(v ) t rea tedwi thmalon ices ter .

t1+1+ 2+2+21

18. Give a method of preparation of diazoacetic ester' How does it react^" ;i l1iis;"r.ti.^ a"d (ii)Acetvlene? 14+2+21

PART _ C

Answer any TWO questions. t 2 x 20 :40f

19. (a) What haPPens when(i) pyiiditt. is treated with peracid

(ii) quinoline is treated with soda - amide in liquid ammonia

iiiil fututt is treated with maleic anhydride

(iv) py*ol. is treated with chloroform and potassium hydroxide and

(v) quinoline is treated with alkaline KMnOa'[ 5 x 2 = 1 0 ]

(b) what is Beckman re€Ilrangement? Give its mechanism and explain

[ 1 0 ]its stereochemistry. a

,20. (a)How will you synthesize the peptide ala-gly ? t 6 l

cul erprain Gabriel phthalimide synthesis of aminoacid. t 4 l

, ,

(c) what is Hofinann Exhaustive methylation? Explain with an example't 6 l

(d) what are the factors that influence the stability of the helical

structuie of Proteins?2L. (a)Write a method of the preparation of Diazomethane.

(b) Discuss any five synthetic applications of diazomethane.

, (c) What is Guanidine? Why it ir_?J:fl

strong base?

t 4 lt s l

F 0 l

[ 2 + 3 ]

MADRAS CHRISTIAN COLLEGE (AUTONOMOUS)B .Sc . DEGREE END OF SEMESTER EXAMINATIONS - NOVEMBER 2012

Gr ( i v ) CHEMISTRY SEMESTER FIVECOMPUTER AIDED CHEMISTRY (CBCS)

Time: 3 hours2tk't

PART A

Answer ALL the questions

Name two input devices.

Max: 100 marks

I

21

4

5

6

7

8

9

l 0

( 1 0 X 2 = 2 O m a r k s )

Give two examples of operating system.

What is an algorithm?

What are control statements?

Write the BASIC expression for y = mX + c.How are strings represented in BASIC?

Write a note on the hierarchy of operations in BASIC.

write a BASIC program to calculate the pH of a solution whose [H+] ionconcentration is 0.01 N.

How many bytes are required to store integers in the computer?

Write a note on library functions.

PART B

Answer any FfVE questions ( 5 X 8 = 4 0 m a r k s )

Explain the various parts of the CpU of a computer.

Draw a ffow:chart to calcurate the molecular weight or acetic acio.

Explain briefly any two languages used for scientif ic work.

il

l 2

l 3

Page I of L

l 9

20

BSc ( i v ) COMPUTER A IDED CHEMISTRY (CBCS) . . . .

14 How are subrout ines used in a BASIC program?

l5 Wr i te a BASIC program to ca lcu late the so lubi l i ty product f rom solubi l i ty .

16 Explain data storage and retr ieval.

17 How are computers usefu l in demonstrat ing exper iments?

l8 How is PowerPoint helpful in classroom teaching?

PART C

Answer anv TWO quest ions (2 X 20 = 40 marks)

Discuss the appl icat ions of computers in sc ient i f ic f ie ld .

Write a BASIC program to generate a table showing the variat ion of

reactant concentration for a f irst-order reaction as the t ime is varied from

10 to 100 min in s tePs of 10 min:In i t ia l concentrat ion, a = 0.01 mol / l i tRate constant , k = 0.001 min- l

Have the fo l lowing headings in your tab le:

S . N o . t ime (a-x )

1 102 20

10 100

lk=2.303 /t * log (a/(a-x) ) l

Zl (a) Explain how MS Word is used to create a table to l ist the names of- - carbohydrates and their molecular mass. How is l ist arranged according

to increasing molecular mass?(b) How would you use Excel to calculate the rate constant and compute its

mean? Also expla in how a graph can be p lot ted and the rate constant

calculated from the slope for a f irst-order reaction. (5 + 15)x ---- x

D a a o ) n f )

MADRA s cHRr s rrq ".g1r:

g-! (A uroNoMo us )B' s c. DE GREE eNo bisreffi g 1en-Eiaifria rr oNs _ No v 2 0 r 214,,/, FN Gr.(iv) Chemistry

APPLIED CHEMISTRY- IrntaE :3 HOURS SEMESTER: FIVE MAX : 100 marks

Answer ALL the questions. PART - A

[ 1 0 x 2 = 2 0 ]]. _What is meant by ,knockins,?2. What is meant bi r.fi"il;i6fp.rot.um?3,. What is coal?

' ----..^o vJ

4t, What do you meal by soundness in cement?li y-h" are safety gtu#J*""o1 trvhat is glazing?

1 I l_tg* is nitrogtfcerine prepared?

: i ,Urj;f"ffii"Hlt;H: ;;ed on the photographic nrm in s'ver

>.-t wnat are fuel cells?I0l, How do anodic inhibitors prevent corrosion?

Answfr any FrvE questions. PART - B

. - | [ 5 x 8 = 4 0 I

]] l_T" are the advaritages and disadvantages of using leaded petror?

,* ; . ; ;*""" ' "I3' lvrite a brief account on naturar and artificiar abrasives.14' Explain the preparation ofphotosensitive emulsions.l5' Exprain the cheriicar principre invorved in corour photography.l6',Describe H, - oz fuel cell with a neat diagram.tz' Dpscribe the production of gobar gas and'mention its uses.

I cc __ _-v sevD

, vuntinued in page 2! . , 1l :

Page 2

B.Sc.(iv) Applied Chemistry I . ;..

18. (a) what are alloys? (b) Describe 'galvanization,. '

PART - C[ 2 x 2 0 = 4 0 ]

Answer any TWO questions.

19. (a) what are the ingredients of portland cement? Explain theirfunctions

t l0 l(b) Describe the wet process of manufacture of portland cement.

[ 1 0 ]

20- (a) write notes on the following with suitable examples. [ 5 + 5 ], (i) Low explosives anAlii; high explosives

(b) what is the principle involved in electrodeposition of a metal?Illustrateelectrodepositionofcopper

[5 +5 ]

. (a) what are the conditions for 'two - metar corrosion' to take place?How can it be minimized?

;(b) what are photovoltaic cells? How are they constructed?

i , ' : ; , . t l 0 + t 0 l,l. rF {r * {a *,t,F

! l

MADRA S CHRr S TrAN ^C_O_L_L!GE (AUroNoMo us )B.SC. DEGREE END OF SI'IVFSTER EXAT,NiNATIONS _ NOV 2012

t0 / 11 FN Gr'(iv) Chemistry

PI{ASE RULE AND ELECTROCIIEMISTRY

TIME :3 HOI]RS SEMESTER: FIVE MAX : 100 marks

, [ l 0 x Z = Z 0 lAnswer ALL the qu.rlions. I

PART - A :

l. Siate fhase ,ulr. ' '

,2' Define the. term 'component'

wiih the illustration of thei ^ _{e=comnosition of,CaCO3.

3,. What are the limitation, of dirt ibution law?1. If" do you mean by eutectic point?5' How does specific conductance vary with dilution?6. Define transport number.

1, _!3* do you unders,tand by electrochemical series?8; What are redox indicatorsi9r calculate the pH and poH of 0.05M sorution of HCI at25oc.Ip'Distinguish strong electroryte frqm weak.t."t oryt..

PART - BAnsweranyFrvl rQuest ionso

[5xg=40JI l' Draw and explain the phase diagram of water system.

i

l2' Explain the principle involved in fractional distillation of miscibleliquid pair and r.uion out why anhydrous ethanor cannot by obtainedby fractional distillation of rectified spirii. -----

13. Discuss fractional crystall ization.

14' state distribution law. How is it modified when the solute undergoes(a) association (b) dissociation il i;j'.o-pr.* formation.15. Discuss ostward's dilution law and its limitations.

tu'#io; would you measure the conductance at infinite dilution of aceric

Continued in page 2

Page 2

B.Sc.(iv) phase Rule and Electrochemistry ....

17' De:finelthe Talegree ofhydrolysis. carculate the degree ofhydtolysis of 0.05Msolution of sbdium *.iu,. at2'oc.Given thatK: 1.85 x 10 -s

and K* = 1.0 "

f O:iul ii;Ci

181 Derive an expression for the pH when sodiurhydrOlySiS. ,

'v vrr wrrsll soqlUm aCetate UndCtgOeS

Answer any TWo questions. PART - c

, t 2 x 2 0 = 4 0 J19' (a) Describe fteezing mixtures and their applications. t r0 l

(b) Explain the principle underlyirlg the process of steam distillation.t r 0 l

20' (a) Describe a method of the determination of the transport numbersof ions in a solution of AgNol. ---- -' 'rv Lr.rrspurt nul

I r0 l(b) Explain the

{o]tgwing potentiometric titrations.(i) Strong acid Vs Sirong base (ti);iCt Vs AgNo3 I l0 l

2l' (a) Describe the construction and working of a calomer erectrode.[r0](b) How would you determine the sorubility product of a sparingrysoluble salt? Discuss its application lr'nlJnrtive anarysis..

I s + s ], F * * * :F * * * ,F ,F *

MADRAS CHRISTIAN COLLEGE (AUTONOMOUS)B.Sc. DEGREE END oF SEMESTER EXAMINATTONS ocrarov-2012

Gr.(iv) CHEMISTRY

o6f t t 4f\ lTIME :3 Hours

APPLIED CHEMISTRY II

Semester: SIX Max: 100 marks

PART - A

Answer ALL the questions.

1. What are insect repellants?

2. What is Bordeaux mixture?

3. Define hydrogenation of vegetable oil.

4. Differentiate between a soap and detergent.

5. What are pigments?

6. Give the use of a vehicle in perfumes.

7. How is PVC prepared?

8. What is SBR?

9. What are food additives?

10. Defineeutrophication.

PART _ B

Answer any FIVE questions.

I l. What are herbicides? How is 2,4-D prepared?

12. How are pesticides classified? Give examples for each.

13. How are detergents classified? Explain using suitable examplep.

14. Write note' .:n the following a) transparent soap b) laundry soap.

[ I 0 x 2 : 2 a ]

15. What are synthetic fixatives? How are they useful in maintaining the fragrance ofperfumes?

What are varnishes and lacquers?

Explain vulcanization of rubber.

What are COD and BOD?

[5 x 8 :40]

16.

17.

1 8 .

LP-T-O

- 1 4 '

PART- C

Answer any TWO questions. [2 x 20: 40]

19. a) Write note on pollution caused by fuel industries. [10]

b) What are food additives? Write note on food preservation methods. [0]

20. a) How is soap manufactured by continuous process? [10]

b) Give the preparation and uses of nylon and decron. [10]

21. a) Write note on the manufacture of paper. [10]

b) Give the synthesis and application of the following.

i) orlon ii) cellulose acetate

* * *: f , l€:1.

l l0 l

MADRAS CHzuSTTAN COLLEGE (AUTONOMOUS)B.Sc. DEGREE END oF SEMESTER EXAMINATTONS -Nov zltz

Gr.(iv) Chemistry2 3 I T 1 F N

CI{EMICAL KINETICS A}iD SURFACE CIIEMISTRY

TIME :3 HOURS SEMESTER: SIX MAX : 100 marks

PART - AAnswer ALL the questions. [ 1 0 x 2 = 2 0 1

1. Define the term rate constant.2. IVhat is Arrhenius factor?3. What is zero order reaction? Give an example.4. What is transmission coefficient?5. What is homogenous catalysis? Give an example.6. The rate constant of a first order reaction is 0.6-93s- t. what is its

half - life ?7. state stark - Einstein's law of photochemical equivalence.8. What is c.m.c.? Mention its significance.9. Define the term chemisorption.10.What are the types of colloids?

PART _ BAnswer any FIVE questions. [ 5 x 8 = 4 0 ]

1 1 . (a) Discuss any two methods of determination of order of a chemicalreaction.

(b) Give the characteristics of the first order rate constant.

12. Exprain the effect of ionic strength on reaction rates.

13. Outline the characteristics of enzyme catalysis.

14. Discuss the kinetics of photochemical decomposition of cH3cHo.

15. Explain the Freundlich adsorption isotherm. What are its limitations?

16. Explain the photosensitization process. Give an example.Cor-rtinued in pase 2

Page 2

B.Sc.(iv) Chemical Kinetics and Surface Chemistry ....

17. Discuss Lindeman's theory of unimolecularreactions.

18. Write an account of stability and eleckical double layer model withrespect to colloids.

PART - CAnswer any TWO questions. [ 2 x 2 0 = 4 0 J

19. (a) Derive an expression for the rate constant of a second orderreac t i onA+B-+C+D.

(b) The velocity constant of a first order kinetics at 25oc is2.8 x 10-3min -r, and the activation energy is l l.9Kcal mol

-r .

Find the velocity constant at 35oC.

(c) Explain the absolute reaction rate theorv.

[ 8 + 4 + 8 ]

20' (a) Derive Michaelis - Menten relationship for the enzyme catalysis.

(b) Explain the fluorescence and phosphorescence.

[ 1 0 + 1 0 ]

21. (a) How is the surface area of a catalyst determined using BETequation?

t l0l

(b) Explain the following :(i) electrophoresis(ii) consecutive reaction(iii) parallel reaction

[ 1 0 ]

* * * * * * * *

MADRA S CHzu S TrA{ ^C9_LLE GE (AUTONOMOUS )B.sc. DEGREE END oF SEMESTER exavnNarroNs _Nov z0r2Lg / tt fiN

Gr'(iv) Chemistry

CI{EMISTRY OF METALS

TIME : 3 HOIIRS SEMESTER : SIX MAX : 100 marks

PART - AAnswer ALL the questions.

I l0 x 2 = 20 |

I Whut is hydrometallurgy?2. Define cupellation3. What are the uses of vanadium?1. !o* is [MCl(PPh:)s] prepared? Mention irs use.5. Complete the equation.

TiCl4 +9, looo-1400'c , ,

6. Mention any two differences between Hg and Zn.1. List any two differences between lanthanides and actinides.8. Distinguish ores from minerals.9. How is FI2WOa prepared?l0.What are the uses of ammonium molybdate?

PART - BAnswer any FIVE questions.

[ 5 x 8 = 4 0 ]

1 1. Write a note on thermite process.

12. what are the generar characteristic of cr group erements?

13. what are polyacids? How are they classified? Give two exampresfor each class.

14' Describe the foilowing citing appropriate reactions.(i) roasting(ii) calcinations(iii) smelting

15. How is titanium metal purified? what are its properties?Continued in pase 2

Page 2

B.Sc.(iv) Chemistry of Metals ....

16. what is lanthanide contraction? Discuss its consequences.

17' Describe the methods of concentration of ores.

18. Write a note on reverberatory furnace.

PART- CAnswer any TWO questions. [ 2 x 2 0 = 4 0 J

19' (a) Describe the chemistry of inner transition elements with referenceto their(i) position in the periodic table.(ii) occurence(iii) oxidation states

(b) Discuss the chemistry of pu.

[ 1 2 ]

t 8 l20. How are the following compounds prepared? Explain their structuresand mention their uses.

( i ) L i2co3 [4x5:20]

(ii) [Ru(bipy)3](iii) OsO+(iv) [ptOIH3)Cl2]

21. (a) Write a comparative account of coinage metals.

(b) Give an account of heteropoly molybdates and tungstats.

[ 1 0 ]

[ 1 0 ]

{ < * * * * * * *

MADRAS CHRI STTAN COLLEGE (AUTONOMOUS)

B.sc. DEGREE END oF SEMESTER EXAMINATIONS - NovEMBER2}rz

B.Sc., Br (tV) ChemistryC oordination chemistrv

Duration:3 hrs :06lu p PAnswer all Questions

' Maximum Marks: 100

(10 x 2:20 Marks)

Part-A

1. \\kite ttre IUPAC names of

a) [Co (NH3)5C1] S04 b) tNi (Co)al.

2. Write the relation between stepwise and over all formation constants.

3. Name any four structural isomers found in coordination complexes.

4. Find the hybridization in [Fe F6]+.

5. What is specto chemical series?

6. What is CFSE?

7. What are inert and labile complexes? Give examples.

8. What is ligand substitution reaction? Give an example.

9. What is iron chlorosis disease?

10. How is Co2(CO)6prepared?

Part -B

Answer any Five Questions ( 5 x 8 = 4 0 M a r k s )

1 1. Discuss Wemer's coordination theory.

1,2. Explain the factors that affect the stabiiity of complexes.

13. What is spin only magnetic moment? Calculate the spin only magnetic moment

of the following complexes

i) tM"clol" ii) [Fe (Hro)u]t* iii) tNi (cN)ol2- iv) [coF6]+Describe the various factors that affect the magnitude of Ae values.

How are d orbitals split in an octahedral complex?

How are cis and nans [Pt (NH3) (NO:) Clz] synthesized from [Pt CL]2-?

Describe the various applications of coordination complexes in Analytical

chemistry.

Discuss the preparation and structure of Fe (CO)r.

t4.

15 .

t6.

17.

1 8 .

P-i" O

Page 2

B.Sc.(iv) Coordination Chemistry ......

PART - CAnswer any TWO questions.

(b) Explain stereoisomerism in complexes.

* * t ( * { . * * * : f * * *

[ 2 x 2 0 : 4 0 ]

19. (a) State effective atomic number rule. Apply EAN rule to tNr (CO)oland I M" (C].D of

'- *dexplain. t 10 l

t 1 0 l

20. (a) Write note on the following :

(i) Jahn - Teller distortion (ii) Postulates of crystal field theory[ 5 + s ]

(b) What are metal carbonyls? Explain any two metal carbonylspreparation and its structure. [10 ]

21. (a) Discuss the applications of coordination complexes in medicinalchemistry. U 0 l

(b) (i) Explain SNt CB mechanism t 6 l

(ii) Discuss Anation reaction with an example. | 4l

MADRAS CH RrsTrAN COLLEGE (AUTONOMOUS)B.SC. DEGREE END OF SEMESTER EXAMINATIONS _ NOVEMBER 2012

Gr ( i , i i i , v , v i ) SEMESTERANCILLARY CHEMISTRY II

T ime: 3 hoursMax : 100 marks

PART AAnswer ALL the quest ions ( lO X 2 = ZOmarks)1 Give two examplgs of addition polymerization.

2 What is isoelectr ic point?

3 Give the use of ch loromycet in and st reptomycin.

4 What are d isacchar ides?

5 What are the. consequences of ozone deplet ion?

6 What is b iomagni f icat ion?

| 7 Define order of a reaction.i

8 What is quantum y ie ld? i

t ' . : , . i '

e' ltlte kohtrausch tbw. , i

10 What is a buf fer so lut ion?

PART B

. Answer anv FfVE questions (5 X g = 40 marks)11 List the differences between thermosetting porymers and thermoprastics.

U, Explain the preparat ion and uselof tsulphani lamide.

Page I of 2

l l

BSc ( i , i i i , v , v i ) ANCILLARY CHEMISTRY I I . . . . .

13

t4

Write a note on natural toxins and food additives.

Explain the laws of photochemistry.

15 What is electroplating?

16 How is a d ipept [de synthesized?

L7 How are carbohydrates classif ied?

18 Wri te a note on pol lu t ion by p last ics.

PART C

Answer any TWO quest ions

1 9 (a) Explain end group analysis of proteins.(b) Discuss the sources and def ic iencies of v i tamins.

( 2 X 2 0 = 4 0marks)

( 1 0 + 1 0 )

20 (a)(b )( c )

2L (a )

(b )

Discuss the Green House effect.Expla in the photochemical ch lor inat ion of methane.Calcu late the pH of 0 .001 N sodium hydrox ide so lut ion.

( 10+5+s)

Discuss two exper imenta l methods for the determinat ion (10+10)of the order of a reaction.Write a note on conductometric t i trat ions.

x ---- x

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