Gujarat University 2005 B.Sc Chemistry Third Year -university question paper
TB-03
Chemistry Paper-IX
TB-03
Chemistry Paper-IX
Seat No.
Time : 3 Hours] [Total Marks: 70
*l*Hl : (1) HHl > %lciLeilL Hli *R"ll
(2) LLLL-IL -RR y-l aiHl 6L"LL.
(3) Hl'gd'L yli flcUCKl Hli -SlR $.
(4) cUHuMhL *1410.-1 -iR C-LMl.
yLil :
R = 1.987 kll/Ml/HlC-L = 8.314 C-l/Ml/HlC-L.
N = 6.02 x 1023 ilCL-1
F = 96500 C-LM
h = 6.623 x 10-27 yoLMi-i
c = 3.0 x 1010 *M/&i -i = 3.0 x 108 Lla/Li-i.
1. (A) SldlHld *ll-L %L*lclLCL-L ylidl SR-l *lLil CLl CA-a rlS *l*ili3l
LclL. (5)
(B) lSaddl Pm SiR aRfcR dlH Cl"il. (5)
(C) 95 C y-l 100 C dlUHl-l Tlisll-Ll CRM- -HU3l y-L'l 600 Pl.Ml. y-l
760 Pl.Ml. . LL TLLSll-il OlVl oRU LlLl. (4)
4lcll
0.002 TjJ
(A) -ilL-i yAlil Swicil K? = l--(5)
V
W T? = UCMl-i. SriCL-i fcl--Lv = ILciLl-il oiTrl orU K? = SLi-i yili.
(B) kLiRld iokta. Alil 41. RSdl ICLdfo.-;- Su -HU3l-{l y*R %L*i>rLcLl. (5)
(C) -Mdl il *iia 27 C llUHl-l N2 + O2 2NO AH -Ll [i*lrl
10.0 [icLl oil/yi >\ as = 0.1 iail/Ml/yi rk il yBui iia-ii
%L*icilCL-i yLi-tt oilrll iL. (4)
2. (A) [ClrlllCLi H.dl *ilil-l *ll 4Uldl (CRi clb-HciL-ft iil iL. (5)
(B) UqMrl-HqMrl ild yaCl ? L *il-il iHa-lliCl-i *l*ili3l Lcll. L y*R
cll ll -iii- $iiiii i iiciL. (5)
(C) 25 C dlU-tl-i HCl dl LciLLL \A%d U,ci *JIL -M -.WHd! iiH H. $.
(4)
Pt H2HCl P = 0.2 atm
HCl H2 P = 1.0 atm
HCl
Pt.
rli yi isl>id\ [cLdLLCiis $lM.
yWi
(A) iM-R -tie [Mrl ML-mcl.
ywi
(A) Llcll-L. Lq.i5Ldl yR LllclL -tle-ll il6 iSl $.b UlCd.-. flldfcR cll-t <\. (5)
(B) "R-y*R yecl ?k ? HL-iPtis y-wi [cKI*. .r y*R awiql. (5)
ywi
(B) nCil -tie-tl Bid ttiteicilfc-fl. Llt <Ri. (5)
(C) y<t yWK VlSLlcll -tie ttdl [-KK*l ll MLL-l ML-tWlctl. (4)
ywi
(C) [-llrl 6dCl-l[Sl- *RLcidL PUUSlMl li <r\. (4)
(A) %iH%*il[-KdL iRH -tie q.tRldl M iu3L .5 TltfclCdl-l cil-l iH. (5)
ywi
(A) &-. -Kl[lill llBiT ? Ot -KlCtilt Ufiil -tlX USKiM d3i -ie'i-l.-U SUil-d KUi iH. (5)
(B) .L-l--L-ciliie yicii yM-iRl -LWd @iR %i[cteR KUi i3.1 (4)
(C) Hi iliL?L y-i 3ML*l[lit IL-lidtl (M ei yciLCL yiUi. (5)
ii6 iLSl *i -il >ciL&ll yiiil : (14)
(1) ".RSL -tie-ii y.?L-K [Lilrl.
(2) HrU3L iiSL-iiSL-fl. M4"i-tdl M &d. <tUi3. SlitLM. $ ?
(3) yMPii -iii-ti icii-tL-ll Cu, Ag y-i Fe M .d. uim -tcil ?iiii. ?
(4) ($&L-(pL "KRSL Fte\Ui.
(5) ll"U-l rieM-l iciL-tl -lciL-il SrU-d. -irll O2 -d Qiit[airll Ml-Wld.
ysild Hg2 Cl2 LCLL Mid KCl yi iL-il [ddLCiif &M. 0 = 0.714 (25 C 13.) y-L knl-KCi =.-1 0.212 cUce . dll yslld LclSL-tl pH SlM.
(4)
(5)
(5)
(5)
(A) [ddLCLif H.dL -tLUd -tie citRLril iM-iS Ulld.-. cld ifti. ftdKai; H.dL -KLUd -tie Mil- ciiee-tle citRlc. d-il. ?LL -tie ?
(B) yVR clc-e y-L [ci-ied cHce> -tie y4cu<a yiui.
(C)
Pt H
Hg
2
Instructions : (1) All questions carry equal marks.
(2) Answer should be short and precise.
(3) Figure to the right indicates the marks.
(4) Write correct question number in the answer book.
Constants :
R = 1.987 cal/deg/mole = 8.314 joule/deg/mole N = 6.02 x 1023 mole-1 F = 96500 coulomb h = 6.623 x 10-27 erg/sec. c = 3.0 x 1010 cm/sec = 3.0 x 108 m/sec.
1. (A) Derive the Vant Hoff equation relating the change in equilibrium constant with
temperature. (5)
(B) Write a brief account on Troutons law. (5)
(C) The vapour pressures of water at 95C and 100C are 600 mm and 760 mm respectively. Calculate the latent heat of water. (4)
OR
2
0.002 Tb
Kb = l where Tb = boiling point of solvent
V
L = latent heat of solvent
V
K = elevation constant
b
(B) Derive the Clapeyron-Clausius equation. Discuss the effect of pressure on melting point of ice. (5)
(C) The value of AH of the following reaction (4)
N2 + O2 2NO at 27C
is 10.0 kilo.cal/mole and AS = 0.1 cal/deg/mole. Calculate the equilibrium constant for the reaction.
2. (A) Discuss the different types of electrodes used in the measurement of emf. (5)
(B) What is liquid-liquid suction potential ? Derive the equation for that potential.
How is the effect nullified ? (5)
At 25C the electrode is kept in HCl solution. The cell is
(C)
(4)
HCl H2 P = 1.0 atm
HCl
Pt.
P = 0.2 atm Calculate the emf of the cell.
Pt H2HCl
OR
2. (A) Explain the Pogendroffs method used in determining the emf of a cell. Why
ordinary voltmeter is not used for the measurement of emf ? (5)
(B) Explain in detail over-voltages and decomposition voltage. (5)
(C) The emf of the cell at 25C (4)
|
Pt H 2 |
|
Hg |
is 0.714 volts. The emf of Calomel electrode is 0.212 volts. Calculate the pH of the unknown solution.
3. (A) Discuss the Florry-Huggins theory of polymer. (5)
OR
OR
OR
(C) Discuss the azeotropic mixtures. (4)
4. (A) Discuss in detail any one method for detection of Isotopes. (5)
OR
(A) What is artificial nuclear reaction ? How does neutron work as a projectile particle in nuclear reaction ? (5)
(B) Write a note on Raman-Spectra or Ortho-Para Hydrogen. (4)
(C) Give a brief account on photolysis and chemiluminescence. (5)
5. Write any two : (14)
(1) Arrestion theory of corrosion.
(2) Fuel cell - How is the efficiency of the cell increased ?
(3) Recovery of Cu, Ag and Fe from wastage material.
(4) Different types of Inhibitors.
(5) Discuss the use of dissolved oxygen in the corrosion of iron in neutral solution.
TB-03 4
|
Attachment: |
| Earning: Approval pending. |
