Chemistry 2018 Past Paper
Chemistry 2018 Past Paper
Chemistry 2018 Past Paper
According to Freundlich adsorption isotherm for gas on solid, at very high pressure of gas,
_,
extent of adsorption, x/m, where x is mass of gas adsorbed on mass m of the
adsorbent.
A Independent of pressure B Directly related to pressure
C Inversely related to pressure D none
VIII Critical temperature is the temperature for a gas of which gas can never be
liqufied.
A Below B Above
C Botha&b D none
It carr be expressed as
0 t'€
(n) i,l = (c)l), =(l + fr) (d,Noneolthese
oll-())
(vi) Thc FreLrndlich aclsorptiou isotherm (x/m) = kpl/'' in ternr of equation of straight
lirre irr intercept forur can be lvritten as:
(a) log(vnr) : ( llrr) log p - log li (b) log(xirr) : log p + (l/n) log l<.
(b) log(x/m) = lo-t n + (l/k) log P (d) log(x/m) : n log p + (lin) Iog k
t:,,
(vii) 'l'he SI units ot'pre-exponcntial tirctor A in eqtration k'= Ac fr- fbr 2"'r order
l'eaction al'e
(a) Conrpton Ef fect (b) Dopplcr Etitot (c) ElectLophoresis eff'ect (d)
Tyndall Etfect
SUBJECTIVE
Q2. Write the short and concise answer for each question: (2x16=26;
a) Define "Collision number,'
b) What is reheochor?
Q.3 what is meant by Carnot cycle? Derive expression for efficiency of heat engine.
Q.4 What is osmotic pressure and how it can be determined?
Q.s what is magnetic susceptibility and how it can be determine by Gouys balance?
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Examination: B.S. 4 Years Prosramme
(a) Conrpton Et'iect (b) Doppler Etltct (c) Electrophoresis eft-ect (d)
'fyndall Eftect
SUBJECTIVE
Q.2 Answers the tbllorving short questions: (2x l0=20)
(a) Deflne the terur colloids.
(b) What is l'r order reaction? Cive r"rnits of l.torder rate constant.
(c) What is refractive index? Has ir any units'?
(d) Give a nratlrerratical relatiou betrveen standard Gibbs energy change and
' eqLrilibriunr constant.
(e) What is adsorption rsothenn ?
Q.4 (a) Derive liinetic equation lbr I't order reaction. (s)
(b) Bne ily describe thc classiilcrtion of colloicls. (5)
Q.5 (a) What is adsolption isotherm? Derive Langmuir adsorption isotherrn- (s)
(b) Derive Clausius-C lapeylon equatiorr to discr.rss the effect of ternperature on vapol
i. The contact angle for the rising liquid in a capillary tube is;
(a) 90o
Equal to (b) Less than 90"
(.i ci"ut".than90o (d) Always l20o ,
ii. The wave number of the light emitted by a certain sourse is 2x1Obm the wave length of this
light will be
a-STP b-127"C and latm c-0"C and 2 atm d-273'C and 2atm
(a) dm mol
6 -2
5 (b) s
-r
(c) drn3 mol S-r (d) mol S-2
i. The contact angle for the rising liquid in a capillary tube is;
a-STPb-|27"Cand1atmc.OoCand2atmd-273.Cand2atm
iv. Which one of the following elements belongs to d-block?
(a) dm
6
mol
-2
5 (b) S
-r
(c) dm3 mol S-r (d) mols-2
PAPER: Fundamentals of Chemistry @asic Chemistry) TIME ALLOWED: 2 hrs. & 30 mins.
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SECTION-I
iii. Define and illustrate bonding and antibonding molecular orbitals in Oz*2.
iv. What are Radioisotopes? Give their three applications.
v. Wlry phenol is acidic and alcohol is neutral?
vi. Why Ammonia is more basic than Aniline? Explain briefly.
vii. Justify that the viscosity ofgases increases with increase in temperature but reverse is
true for liquids
vlll. Why the Transition Elements show variable valence?
ix. Explain the structure of berzene on the basis of Hybridization.
x. What is Einstein theory of photoelectric effect?
SECTION-II
a) Derive expression for radioactive decay rate constant ofa radioactive substance.
b) Explain the structure of,PCLs, NH: , BF: and BeClz on the basis of Hybridization.
example.
e) Write rules for Nornenclature of Carboxylic Acids. Give example of each rule.
0 Derive the equation for First order reaction in which the initial concentrations is 'a' moles
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Q.1 Each qr-restion has forrr possiLrle answers. Choose the correct answer and encircle it. 1 x l0 =
l0)
i. Which ot tlrc Ibllrrrving theolyrnrodel explain splitting of d-orbital?
llt. A sorllcc ol gleat.'r'stability, o1'pi-bonds between the smaller atoms could be the better
overlap ol'
BF,r is a Lurvis
VII. Wtiiclr oi tlrc lrrll,rrvrrig orbitais olntetal ions have almost same energy and same sirape
ir. \,viriuir Ii iiie i(iii,,'uii,,, is Ir)l Ltscd i'o;^ cletection attcl ttteasurenterrt of ladioactivity'i
(a) e 1,c lo it ,, rt (b) cloucl (-lhanrber (c) bubble Chamber (d) electrometer
i. \\iirich ol'the lbllo,.r nrrt l)osscss rrrole iouization potential and why?
a) Be b) lt
ii. Or nrolccLrlc is piilr.ruruguetic iu nature. Justify the statement.
iii. tJi-S bonrl is relerlivcly mole stable than Bi-N bond. Give reason on the basis oIHSAB
concepL.
Q.3 Courpiiru tiic stLtt. trttcs oi-lbllowirtg oll the basis oIVBT, MOT and CIiT.
, 4- (5$=10)
11':..;i I o)(,]r. ii [Fe(cN)ol
e.5 What i: i)ii'gunal lslaiionship? Explain this concept r:i,ith suitable examples. 10
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back after expir of time limit mentioned above.
! no[No...................... i
Examination: B.S.4 Years Prosrammp !..llT.'ll'.'.':'.'i'ii'ii'ii'.'i'j'...
(d) How could you differentiate between nonaromatic and antiaromatic compoundsby huckel
rule. (2)
(f) Differentaite between terms enatiomers, diastereomers and epitners with examples. (4)
(e) Explain why a chloro group is deactivating but o,p-directing. (2)
0, Explain why esters have low boiting point than that of conesponding carboxylix acid.(2)
(i) Why cis- 1,2-dichloroethene is polar (p= I .0D), while trans- 1,2-dichloroethene is non-
polar(p=1.0D), exptain. Q)
Q3.(a) what are E1 and E2 mechanisms of elimination reaction and also discuss Hoffinann
and Sytzeffrules during elimination reaction with examples. (6)
(b) Cive the principal products of the fotlowing reaction with the mechanism involved in
each case. ( I0)
i) Hg(AcO)2, H2O e
(ir) :Hc-8'-c=cH --------------- > I
ii)NaBHa, NaOH
(c) Design suitable syntheses of the following compounds starting from benzene? (8)
(d) Draw all structural (constitutional) isomers of C5Hys whichcontain a C=C double bond
l. Which of the following group would not have inductive effect (+l).
5' Appropriate hybridization sclrernes for the c atoms in rnolecular cH3co2H are:
a. spl and spl b. sp2 and sp3 c. spi and sp2 d. sp3 and sp3
6. what is correct order of increasing acid strength of (l)Aceticacid (2) Ethanol (3) phenol
10. Which of the following alkyl halides would give SNI most readily.
Q.3 i-xiensiveQuesrions
a) Derive Schrodinger wave equation in terms of Polar. Coordinates. (5)
b) Brielly describe various types of errors, Give their significance in chemistry. (5)
c) Give and two Nucleophilic Snbstitution reactions of carbonyl compound along
mechanism(s) involved (5)
d) Explain the working and elficiency olFlanrc enrission Spectrophotometry. (5)
reactiolls.
e) Oourpalc l|.tnsdeickcr and I(ochi (5)
l) Givc fbirr applications ilijV Spectroscopy. (5)
....
UNIVERSITY OF THE PUNJAB Roll No.
1.The integrated rate equation for zero order reaction is,r _ kt.
The half life period of the
reaction is:
A. S'I
B. MS-r
C. MS
D. M-IS
3. The Arrhenius equation is k : A e-(EalRr) .The slope of a plot of ln k vs. l/T is equal to
A. k.
B. k.
C. Ea.
D. -Ea /R.
4.A mathematical instruction or a mathematical procedure which is carried out on a
function to get another function is called
A. Eigen function
B. Eigen value
C. Laplacian operator
D. Opirator
5' EY = HY is the simplest form of Schrodinger Wave equation, where
E is the enerry and
Y is the wavefunction. In this equation, what does the H represent?
A. de Broglie relation
B. Hamiltonian operator
C. Avogadro's number
D. Planck's constant P.T.O.
6. The energy transition between two rotational levels in rigid rotators can be calculated by
following expression
A. B(J+l)
B. 2B(J+1)
C. 2J+l
D. Non
7. The Schrodinger Wave equation is a differential equation relates the wave function of
electron with its
A. Kinetic Energy
B. Potential energy
C. Vibrational energy
D. Rotational Energy
8. The specific resistance of 0.lN KCI solution was found to 93.6oat room temperature.Its
specific conductance will be
Section II :
Q.1 (i) What is equivalent conductance? Derive its units. Discuss the eff'ect of temperature and
(ii) The resistance of a decinormal solution of a salt occupying a volume between the two
platinum electrodes 1.80cm apart and 5-4cm2 in area was found to be 32 ohms. Calculate the
equivalentconductanceofsolution. 03
(iii) Derive a relation for Debye Huckel Theory for weak electrolyte. 0s
Q.2 (a): Systernatically apply Schrodinger wave equation on H-atom and derive Azimuthal
quantum number by considering Ae = Pz 05
(b) : What are rigid rotors. Prove that E.r: BJ (J+l). Also derive zero point energy of Rigid
Rotators (05)
P.T.O.
Q.3 Kinetic equation of a certain order reaction is
.(a\
,"1;1=* (A)
(i) Derive an expression for available concentration of reactant as a function of time and
discuss its time dependence with the help of this expression. Give sketch of the following
curves: 03
. (a) a-x vs t
(b) x vs
(ii) What is the extent of reaction? Under what conditions it will be unity? How can you find
the value ofrate constant graphically using equation A when initial concentration ofreactant
is unknown? Give Units of k in equation A and predict tre order of reaction. 03
(iv) Prove that the half life period of the reaction fbllowing equation A is inclependent
ofinitial concentration ofreactants. Ifthe reaction has a rate constant of 1.00 s'l what is tho
NOTE: No mark on question psper except your roll nurnber, C utting, Ov erw riting, us e
c) TeF6 d) cil-r
ir,) In octahedral coruplexs the eg orbitals arc called
a) Nonbondoning orbitals b) Bonding orbitals
c) Antibonding orbitals d) Noneof these
iv) Which one of the following does not obey effective aton.ric number rLrle?
a) Co (Co)a b) Ni (co)4
SECTION-1
i) What are intdnsic semiconductors? Explain with the help of N(E) Curves
iii) Calculate the CFSE(Crystal Field Stabilizatiorl Energy) for cach ol'the lbllowing systcn:
SEC'IION-TI
SUBJE,CTIVE (5x6=30)
i) Draw the slructures of the following nrolecules on the basis of MO'I.;
a) [ColNHi)6]r- b) [CoF6.]3
ii) Discuss the essenrials of Crystal Field Theory (Cf t).
iii) Discuss Metaliic bond on the basis of bancl theory.
ir) l)iscuss the chemistry of Cr(CO) 6.
ii). The basic strength of 2,6,N,N - Tetramethylaniline as compared to anlline is ------ by Sterlc
hindrance:
(a). decreased (b). increased (c). not affected (d). equalized
iii). The conJugate base of which of following acid is more stabilized by the resonance:
(a). 2 - Nitrophenol (b). 2,4 - Dnitrophenot (c). 2,4,6- Trinitrophenot (d). 2,6 - Dinitropehnot
vii). How many equatorial hydrogen atoms are there ln the chair form of cyclohexane?
(a). Six (b).Three (c).Four (d).Five
x). Conversion of an optically active compound (either enantiomer) into an equimolar mixture of the
enantiomers is known as:
(a). Asymmetric synthesis (b). Racemization
(c). Resotution of racemic mixture (d). Setective adsorption
UNIVERSITY OF THE PUNJAB
aa a
aaa a. a aa a aaa aaa a a aa a a aa
a). Arrange the foltowing compounds according to the increasing order of acidity. Provide suitbabte reasoning for
your arrangement, (2x5=10)
oo oo
CFr
00
lltl
,,\---^--r._
9Et
H )v o
NOz r,AAoe,
(i) (ii ) (iii ) (iv) (v)
HoC\
"=*\
or"\ CHsCHzCHz
t c- coon C-C=CH c- cooH \.-.r,"r.,,
cl '"'f or* "'
/
""'/ ,a""/
"r
H F H CzHs
ii).
What is chiral carbon? Certain compounds that do not have Chirat carbon show opticat activity. Give three
examptes of different ctasses of compounds with reasons. (5)
c). Describe the mechanism and two synthetic application of the fottowings: (5,5)
(i). Stobbe's condensation. (ii). Reformatsky reaction.
...
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Examination: B.S. 4 Years Prosramme \
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Course Code: CHEM-307 MAX. MARKS: 10
Attempt this Paper on this Question Sheet only.
OBJECTIVE TYPE
Q1 MCQS (1x10=10)
(i) Both hydrogen and deuterium lamp produce outputs in the range
(a) 160-800 nm (b)10-700 nm
(c) 200-400 nm (d) 400-750 nm
(ii) Comparison of standard deviations is done by
(a) F-Test (b) T-Test (c) Dixon,s e_test d) None
(iii) Real limitations to Beer's law are due to
(a) High concentration of solute (b) polychromatic radiation
(c) Stray radiation (d) Dissociation of solute
(iv) What is the maximum value of absorbance?
(a)2 (b) 1 (c) 100 (d) 10
(v) The stationary phase in reverse phase chromatography is
(a) ion exchange resin polar
(b) (c) nonpotar (d)Ail a,b,c
(vi) which of the following is continuum source for UV molecular absorption?
(a) Globar (b) Deuterium lamp
(c) Nernst glower (d) Tungsten filament
(vii) 10 ppm is equat to
(a) 100 ms/lit (b) 10 mg/mL
(c) 10 mg/lit (d) 100 mg/kg
(viii) According to Beer's law absorbance does not depend upon
(a) Solution concentration.(b) Extinction coefflcient of the sample.
(c) Colour of the solution. (d) ail
(ix) The maximum Rf value for any substance in paper chromatography is
1.0
(a) (b) 10 0 (c) 0.90 (d) 100
(x) Which statement is wrong about TLC
(a) Stationary phase is'silica
(b) Polar compounds will spend more time in the moving phase
(c) Non polar compound will move faster
(d) Polar compound will appear lower in plate
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a.
Fifth Semester 2018
a) Particle Size
b) Quantity of material
c) Quality of material
d) None ofthese
v) During evaporation, heating is done at reduced pressure, this is important
a) To evaPorate water at a high rate
b) To avoid thermal degradation of substance
c) To minimize the consumption of steam
d) None of these
vi) In Modified Lime Soda process which chemical is used
a) Barium hydroxide
b) Calcium hydroxide
c) Zinchydroxide
d) Magnesium hYdroxide
vii) In manufacturing of sodium hydroxide hydrogen gas liberates at
a) Anode
b) Cathode
c) Both anode and cathode
d) None of these
viii) The optimum conditions for the conversion ofsoz to sol in contact process axe
a) V2O5, latm,650oC
b) VzOs, latm,450oC
c) VzOs, 2atm, 500oC
d) V2O5,5atm,450oC
ix) During setting of cement, Hydration and hydrolysis occurs in which order?
a) Hydration followed by hydrolysis
b) Hydrolysis followed by hydration
c) Hydration and hydrolysis occur simultaneously
d) Can'tjudge
a; Extensive Questions 30
(A) Glutamase
(B) Virus
(C) Arnylase
(D) C lutamine synthetase
P.T.O.
6. pKa value of Ulacil rauges frorr :
,.
Fifth Semester 2018
Examination: B.S.4 Years Prosramme :-tt"t""tt"t""tttttt'
RoIl No'
(A) Rhombic
(B) Monoctinic
(C) Hexagonal
(D) Cubic
(A) Clutamase
(B) Virus
(C) Amylase
(D) Glutamine synthetase
P.T.O.
6. pKa value of Uracil ranges frorn
(A) 7.0 to 8.0
(B) 9.0 to 10.0
(C) I 1.0 to 12.0
(D) 12.0 to 14.0
ii) The positil'e value of Gibbs energy c,f a process indicates that the process is
(a) Endothermic
(b) Exothennic
1d) Spontaneous
(a) AG:i{ l'lnK (b, AG= -RTtnt( (c) AG=RtnK (d) AG= IInK
(a) ASsur> 0 (b) ASsys> 0 (c) ASsur +ASsys > 0 (d) ASsur+ASsys < 0
(a) i-nxl = xlnx-x (b) x= xlnx (c) lnxl:lnx2 (d) None ofthese
(ix) 1'he uuits of rate constant for zero order reaction are
(a) MSec-r (b) K kg mol'2 (c) K kg mol (d) nrold ,', Se"-,
Shod Quesiigi:r
2x10=28
1. why hybrid orbital exhibit better overlap than simple
atomic orbitals?
2. Differentiate inner arrd outer transition elements.
3. What is Jahn Teller distortion theorem?
4. Differentiate between polarizing power and polarizability?
c. vvnat rs Fal1an t,le?
6. What are post transition elements? Give examples
7. Calculate Z"nfor 4s electrons in Cobalt (Z=21).
8 What are lrydrate isomers? Give examples.
9. Can lanlhanurn ion exist in + 4 exi6"11on state? lf yes then how,
if no then why?
10. What is 4c-3e bono,? Give example
I!g+g+!e!rc!qthe correct ootion. Each MCO carries I Mark This Paper wiII be collected
back after expin of time limit mentioned above.
Q.1 Each question has four possible answers. Choose the correct answer and encircle
it. (1 x 10=10)
(a) Square planar (b) Tetrahedral (c) Distorted rectangle (d) octahedral
5 pFI of 1N HCi is
a. 0 50% b. a71%
c. 2.O% d 5.Oo/o
Q.No. 3. Describe two clifferent methods for the lbllowing conversions with mechanisnr?
(i) Alkene to Cls-diol (ii) Acid cl.rloride to aldehyde (5+5=10)
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a) Atdehyde b) t(etone
c) Ctrrboxylic acid d) Alkene
II I. Lindlar's catalyst woulcl converted alkyne to?
a) 7.ians-alkene b) C'ls-alkene
c) Alkane d) Cycloalkane
IV Clenrmensen reduction rvould convelt an aldehycle to?
a) Alcohol b) Alkane
c) Acid d) Amide
Whicir of the followir.rgs would be used arornatization o1'cyclic con-rpounds'?
a) Benzoquinone b) DDQ
c) Chloranil d) All of a,b,c
VI. 1-Propene on reaction with borane (BH3) ancl AcOH would produce?
a) n-Propane b) I -Propanol
c) 2-Propanol d) None oIa,b,c
VII. IR spectrur.n showing intense peak at 1720 crr-r indicate the firnctionai gloup'?
a) Auricle b) EsteL
c) Cyanide d) Ketone
Vlll. Higirest eucrgy excitatron of elecrrons in UV/Vis. Spectroscopy' are rel'erred to?
!laaaanoilNo......................
aaaaaaa aaaaaaaa aaai
aa
:
SUI]JECTIVE
Section I
(2x10=20)
Q.2- Attempt all Short questions
How do DoPPler Efltct and pressure broadening aflect the transitions in
atornic
(i)
spectroscoPY?
(ii) wlrat are the characteristics arrd advantages of rveak base anion resins'/
(iii)HowaresamplesintrodttcedincapillaryelectrophoresisSystem?
(iv) Describe tlre term pelcent extraction and separation factor in solvent extraction'
(u)Howelectro-osmoticflowcanbealteredincapillaryelectrophoresis?
(vi) Describe the role of rrrasking ancl oxidation state in increasing the selectivity of
nrctal extractions iu solvent extraction.
(vii)Compareair.acetyler-reandnitrousoxide-acetylenef.lan:esinAAS.
(viii) What do you knou,about chernical irrterferences in atonric spectroscopY?
(ix) Write dorvn the principle of solid phase extraction
(x) Describe Irebtrtization in flame emission spectroscopy'
Scction ll
Atternpt all qtrestions (3 x l0 = 30)
Q.3 (a) Explain the constrttction ancl working ol
graphite fttrnace (5)
(tr) Discrrss dif ferent components of flow inje ction analysis' (5)
Q.4 (a) Discuss the factors affecting ion exchange separations' (5)
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PAPER: Analytical Chemistry TIME ALLOWED: 15 Mints.
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Course Code: CHEM-319 Part - I (Compulso
Attemot this Paper on this
OBJDCTIVE
(lxl0:10)
Q.l MCQS
(ii) A typical weak acid resin has a lirnited capacity belorv pl-l
a) t0 b)8 c)6 d) 12
in ion exclrange
(vii) which of the following ions possesses the highest exchange capacity
chrornatographY
(a) I (b) cr (c) F (d) B.
is called
(viii) Combined action of two complexing reagents in solvent extraction
(a) tlatch extractiorl (b) Contintrotrs extractiorr
(a) Sulfonic acid (b)Carboxylic acid (c)Phenol (d) Alkyl ammoniunr salt
Itr ooRouNo......................
rr ro aaaaaaaa aaa aa
:
aa aa'
iii) Cullet is
a) Crrrshed gl:rss
h) Cr-Lrsired ce r.anr ic
c) Sand pa rticies
d) Norc of thc zLbcve
iu) Giass is
a) Undercooled liquid
bJ A L,nion ol'rr.rrrvi,rlatile
irrurgarrrc oricies
c) .Atuorlrhous solid
d) Ali above
r,) An rnder.,of pr.ogr.essire grolrtir
ola country is trtilization ol.
b) Il:SOo
c) I-lcl
tl) Or-ganic solverr ts
c) Borh of thcse
rl) None o l' heset
(SUBJECTIVE TYPE)
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Course
_ # "'
Attemot this Paner on this
a) Holoenzynte
b) Prosthetic grouP
c) ApoenzYme
d) Coenzyme
v) LECITHINS are also known as
a) PhosphatidYlinositol
b) Phosphatidylcholine
c) PhosPhatidYlethanolamine
d) None of these
(SUBJECTIVETYPE)
2x10 = 20
Q.2 Short Qucstions
i. What do you nean by the term Coagulation?
6r5=30
Q.3 ExtensiveQuesiions
a) Give the Potential Impact of Global warming on the Environtnent?
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(OBJECTIVE TYPE)
Q.1 Encircle the most suitable answer from the given options.
l0
i) Oil spillage is tire canse of
a) Air Pollution
b) Soil Pollution
c) Water Pollution
d) None of these
ii) The n.rajor ingredient of the LONDON smog was
a) SOz
b) No,
c) o:
d) All of these
iii ) Which method is used to remove permanent hardness of r.vater?
a) Aeration
b) Chlonnation
c) Ion Exchange method
d.; Coaguiation
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ii. The dispersal ofa precipitated material into colloidal solution by the action ofan
electrolyte in solution
(a) coagulation (b) dialysis
(c) peptization (d) ultra-filtration
iii. The precipitating effect ofan ion on dispersed phase increase with the valence of
the precipitating ions. This rule in known as
tx. l{eat of adsorption is defined as the energy liberated when ofa gas is
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Subiective Part
-SHORT QUESTIONS
Q.2 Answer the following short questions: (2 x r0)
(10)
(10)
...
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Seventh Semester 2018
Examination: B.S. 4 Years Proeramme
Obiective Part
VIII. A molecule can be excited to only the next higher rotational level by
Objcctive (1 xl0=10)
Note: Cutting, overwriting, use of pencil, ink removers and Blanko are not allowed.
i. Explain use of "d" orbital in bonding by non-metals with some examples. (10)
ii. W'rite a note or1 the LIDTA titrations. ( l0)
iii. How correlation diagram approach is applied for ttiatomic molecule to deternrine the shape
of the molecules? (10)
TINTYERSITY OF THE PT'NJAB
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Seventh Semester 2018 aa
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Examination: B.S. 4 Years Prosramme 3
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PAPER: Inorganic Chemistry (Sp. Theory-Il) TIME ALLOWED:2 hrs. & 30 mins.
Course Code: CHEM-407 MA)t MARKS: 50
Attempt this Paper on SE arate Answer Sheet provided
Short Questions
Lonq Questions
OBJECTIVE TYPE
Q. 1 Tick the correct answer (1 x 10)
(i) Purification of an impLrre copper is made b1,' electrolyic cell, in which impure copper is anode ald
pure copper is cathode and eleotrolfe is
(a) ti:SO+ (b) CUSOq
(c) ZrlSOa (d)
NazSO;
(ii) Passage of electric current through the metals is due to
(a) Oxidation reaction (b)
Reduction reaction
(c) Electrolysis (d)
Free movement of electrons
(iii)Using graphite electrode the electrolysis of aqueous solution of NaCl produces at anode
(a) l-12 gas (b) Cl2 gas
(c) NaOIJ (d) Na metal
(iv)Whichisotopeis prodrrced by an (n, 1) reaction from 230Th?
rrr,ffl"e
23tTh 23iPa
b; d)
(v) An amido ligand is:
(a) [NH:J- (c)[N[]]'?-
(b) NHl (d) N'
(vi)Liquid ) lIi undergoes sell ionization to give a liqLrid tirat contaiu-s:
' (a) (c) I{+
tHzFl-
(b) [HFz]- (d) F-
PAPER: Oryrnic Chemistry (Sp. Theory-t) TIME ALLOWED:2 hrs. & 30 mins.
Course Code: CIIEM-409 MAX. MARKS:50
IV. Describe the kinetic evidences of ElcB reaction. Give one example?
V. Holv can you explain that the polarity of solvent affects the rate of S51l reaction?
Q. NO.3.
l' How the deuteriurn isotope effects can be used for determiuation of reaction
mec)ranism? [5]
[. what are pyrolytic elinination reactions? Give two examples with mechanism.
t5]
III' Expiain with the sr'ritable example that arornatic rings.at position can participate
B as
group in aliphatic nucleophilic substitution reactions.
^
Q.
-neighbouling
NO.4 f5]
Ct
u) )-,- + NaOI-I
+ 31l Conditions
FI2O
nr)
SOCI,
rv)
Ether
cHloH
v)
11l Conclitions
UNTVERSITY OF THE PUNJAB ".. Roll No.
Seventh Semester 2018
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PAPER: Organic Chemistry (Sp. Theory-t) TIME ALLOWED: 30 mins)'..
Course Code: CIIEM-409 MAX. MARKS: 10 ".
Attempt this Paper on this Question Sheet only,
Attcmpt question I on this question paper.
a) Fluoride ion
b) Chloride ion
c) Bromide ion
' d) Iodide ion
a) Water
b) Benzene
c) Hexane
d) foluene
J. Sx I t'crrution is a
a) Zero order'feaction
b) n-Butyl chloride
c) Isobutylchloride
d) n- hexyl chloride
a) F.l reaction
b) E2 reaction
P.T.O.
c) Spl reaction
d) Sri2 reaction
6. Neighbouring group mechanism operates with
7. Consider the following two anions. Which of the following statement is TRUE for them?
a)1
b)2
c)3
d)4
10. Aryl halides and Vinylic halides
a) Do not undergo SN1 reactions but undergo SN2 reactions
b) Do not r.rndergo Sy2 reactions but undergo S511 reactions
PAPER: Organic Chemistry (Sp. Theory-Il) TIME ALLOWED: 2 hrs. & 30 mins.
Course Code: CHEM-410 MAX. MARKS: 50
(ls)
Question No. 4. Answer the followings rvith necessary details?
(3)
r) Preparation of halo benzenes from aniline with mechanism and examples?
(3)
ID Spectroscopic evidence of aromatic sulfonation reaction?
(e)
IID How would you prepare the followings from cyclopentanone?
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l1 I
(-o
il
r--ruH
1l
\2 \, \,
i ii
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UNTVERSITY OF THE PUNJAB RollNo.
Seventh Semester 2018
Examination: B.S. 4 Years Prosramme
Question No. 1. Select the most appropriate option in the given MCes
I) Which aromatic compound will be least reactive for electrophilic aromatic substitutions?
a) Benzene
b) Chlorobenzene
c) Nitrobenzene
d) Phenol
ll) Which aromatic compound will be least reactive for nucleophilic aromatic substitutions?
a) Benzene
b) Phenol
c) Chlorobenzcr.re
' d) Nitrobenzene
P.T.O.
VD Cyclohexanone on reaction with NHzOH followed by acid treatment would yield?
a) Cyclopentane carboxylic acid
b) Cyclohexylamine
c) Lactone
d) Lactam
VIII) Which of the followings is most reactive as diene for Diels-Alder reaction?
a) Benzene
b) Thiophene
c) Furan
d) Pyrrole
PAPER: Analytical Chemistry (Sp. Theory-I) TIME ALLOWED: 2 hrs. & 30 mins.
Course Code: CHEMAI? MA)L MARKS: 50
1. What is a thermocouPle?
2. Give two differences between DSC and DTA'
Long Questions
(10)
Q 3. Give instrumentation and principle of DTA.
(10)
Q 4. Give construction and working of any one reference electrode'
MCes
PAPER: Analytical Chemistry (Sp. Theory-ID TIME ALLOWED: 2 hrs. & 30 mins.
Course Code: CHEM-413 MAX. MARKS: 50
SUBJECTIVE
Section I
(vii)WhatisdifferencebetweenAnti-stokestransitionandStokestransitionin
Raman sPectroscoPV?
Section ll
(5)
a.(4)-(a) Discuss Laser sources ln Raman spectroscopy
(b). Discuss the sampling techniques in FT-lR spectroscopy' (5)
Q.5-(a)ExplainpumpsandspraychambersforsampleintroductioninlCP.AES(5)
(b)- Write down the applications of atomic fluorescence spectroscopy' (5)
UNTVERSITY OF TI{E PTINJAB ".. RoIlNo.
Seventh Semester 2018
\
PAPER: Analytical Chemistty (Sp. Theory-Il) TIMEALLOWED:30 minsl.
Course Code: CHEM-413 MA)L MARKS: 10
OBJECTIVE
(iii)- Which of the folloviring component of ICP is used to introduce Solid samples
a) Nebulizer b) Cuvette having glass windows c) Probe d) Lase r ablation system
(a) Molecular mass (b) Conjugation (c) Functional group (d) All
(viii)- Which type of degrees of freedom are equal for linear and non linear molecules
PAPER: Applied Chemistry (Sp. Theory-t) TIME ALLOWED:2 hrs. & 30 mins.
Course Code: CIfiM-415 MAX. MARKS: 50
Short Questions
Subiective Part
10 x lJ = 30
tb) What are triple superphosphatcs, write down their important proporties. 5
....
TINTYERSITY OF THE PUNJAB RollNo.
Seventh Semester 2018
Examination: B.S. 4 Years Programme
B. Which of the following has the lowest viscosity ol'all at given temperature?
ta) Naphtha (b) l)iesel
10. Amn-ronia fcrtilizer.s are usually madel hy two col11lloncnts, th(ly are
(c]Ammoniaandwater(d)Amm0niaandcarbondioxide
UNIVERSITY OF THE PUNJAB aaaaa a'a
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Seventh Semester 2018: - .. -. :
r*"-in"uoo, n.s. a y"-"i, pioera-n," i..1:T.I]:'.';:'i:'.':'i:'.':'i:'j'..:
PAPER: Applied Chemistry (Sp. Theory-ID TIME ALLOWED:2 hrs. & 30 mins.
Course Code: CHEM-416 MAX. MARKS: 50
SUBJECTTVE TYPE
Q No. 2:- Give short answers to the follorving questions:- (2 xIO = 20 marks)
Q No. 3:- (a) What are the different applications of AAS? (4)
(b) Write a note on hollow cathode lamp. (6)
Q No. 4:- (a) Explain the DUPLEX process for the manufacture of STEEL? (s)
(b) How is CHROME PLATING carried out? (s)
OBJECTIVE TYPE
1. Which of the following has no CHROMOPHORE and is usually COLOURLESS?
, (a) Hydrobenzene (b) Turkey red
(c) Mauve (d) Magenta
4. The average composition of CAST IRON has the following percentage of IRON:-
(a) 85-87 (b) 87-89 (c) el-e3
(d) e3-e5
10. POLYMER RESIN prod,uced by coating of glass beads for separation of CAI'ION in HPLC is:-
(a) Melamine resin (b) Acetal Resin (c) Zipax resin (d) Polyurethane resin
T]NIVERSITY OF TITE PUNJAB
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Seventh Semester - 2018 aa
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PAPER: Bio Chemistry (Sp. Theory-I) TIME ALLOWED: 2 hrs. & 30 mins.
Course Code: CI{EM-418 MA)L MARKS: 50
Attempt this Paper on Separate Answer Sheet provided.
[Subjective Type]
gland?
(b) Give biological function of pituitary 4
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PAPER: Bio Chemistry (Sp. Theory-t) TIME ALLOWED: 30 mins)'.
Course Code: CHEM-418 MAX. MARKS: 10 "..
Attempt this Paper on this Question Sheet only.
PAPER: Bio Chemistry (Sp. Theory-Il) TIME ALLOWED: 2 hrs. & 30 mins.
Counse Code: CIfiM-419 MA)L MARKS: 50
3. Write down the occurrence, chemistry and deficienc-y symptoms of Vitamin E'?
.....
I]NIYERSITY OF THE PUNJAB RollNo.
Seventh Semester 2018
Examination: B.S. 4 Years Prosramme