Gujarat University 2005 B.Sc Chemistry Third Year - - IX - Question Paper
TB-03
Chemistry Paper-IX
Seat No.
Time : 3 Hours] [Total Marks: 70
ij'Vll : (1) HHt > iLciLl-iL iRML $.
(2) itciLCldL .-LiR H-i SiL et*il.
(3) Hlgdl HLS LclLCl--LL HlS -$lL $.
(4) >rcii&ixileit*il iLLLl iLcLLCL-il -i&R Cl"il.
Hlsl :
R = 1.987 k-RVMl/HlC-l = 8.314 Cl/Ml/Hll.
N = 6.02 x 1023 ilCL-1
F = 96500 Cl-L
h = 6.623 x 10-27 Hol/ilA-S
c = 3.0 x 1010 iM/ilS-S = 3.0 x 108 ile/ili-s.
1. (A) SLdLHLd itt-l iLirLlCl-i HtqtSdL L-l il'lM Ctrl cit-e 1 itilSL
mi. (5)
(B) eLSe-L-iL [-.LH SR iRfcR -tfa. Cl"il. (5)
(C) 95 C H-i 100 C dLUHL-i mM-U cRtq-j --LLL H- 600 [i.tl. H-i
760 [..ft. . it TlLSll-il Of-d Lil iM. (4)
Wl
0.002 T?
(A) -M-. itili.L Sl>'Lcll K? = -l--(5)
V
W Tb = yciLl-l ScSCld [&L--Lv = uqMM oi otil K? = Sil-i HtqtS.
(B) ACiTLi-l ACjkthi. itilSL iqcil. &RdL oLCldfo.-- SR -HU3l-{l HiR iLWLetl. (5)
(C) -M-U {lSL lie 27 C dLUHL-i N2 + O2 2NO AH -il [SHd
10.0 [SclL Clil/Hi >\ AS = 0.1 SClil/iloil/Hi .L il H[' it HtedL itirLiCi-i HtqiS-il ofSLdl Sl. (4)
2. (A) [cirLLLClS HqdL HLUd L.e ef-RLdt (cRH cil>Hcli-il it Sl. (5)
(B) Hciil-iciLl >TSL-i HeCi . ? l tte-it ui.e-*Lhet-l itilSL tqcil. rt HiR
cll lrl -LL6J- il LS.l t >'LLcti. (5)
(C) 25 C rilUHl-L HCl -il lcU3lHl [dr q. dl -M {H-iI X .
(4)
Pt H2HCl P = 0.2 atm
HCl H2 P = 1.0 atm
HCl
Pt.
rl =Hl X-1 [crlllC't H lM.
lcll
(A) Tel. l S<aiil-ll--il [il&rl il>c.
WWi
(A) UCIh lcl-ll lcl Hl-{l t USl UCr-i il[crl. cR . (S)
(B) "l-il .C. l ? lUq.PU lcll frtili "l. =Hi i-Wlcl. (S)
WWi
(B) uBm.1 - - il[i-lrl irlsc&-{l ll . (S)
(C) cic lll l -ll [-l l ill- illc\. (4)
WWi
(C) [-r 6re-[S- Hlcrll [{-{1 ll . (4)
(A) ilHi-U[--U T." l clrl t TS U&[r-i csh . (S)
WWi
(A) &H -.lCik H[l ? O -U[M. Cl l U&UW rll -i-t-U Hl-fl. ll . (S)
(B) l--l-c ml hM-tI l>H .U il[crl ll . (4)
(C) H Hll -l lill[l UKl (M cci Hu. (S)
t Ul l -l WHl lU. : (14)
(1) "JSl Hl-ll .H [Mrl.
(2) Hrll l-l-{l M4"Hrll 4 lr cll lll ?
(3) -t ll cll-l Cu, Ag -l Fe 4 lri. Ull {cI l. ?
(4) >;-l->Xl "JSl [-l.
(5) CHM-l rli- lcll c-l 6rU--. -rll O2 -l 6u4lrll ilWlcli..
llrl Hg2 Cl2 *cS ilrlrl KCl =Hl M- [crlllC'i H G = 0.714 (25 C U) =H-L tCLHC cl-ll 0.212 dee . rl lcll-tl pH lM.
(4)
(5)
(S)
(S)
(A) [crlllC't H-tl *T- * c.lrl uM-S UCr-. csh . [crlllC'i -l-tl *t- * ill- c\c'l cxr --l. ?
(B) =hV cer =h-l [2-. cC'> =H4q.<a :hiu.
(C)
Pt H
Hg
2
Chemistry Paper-IX Time : 3 Hours] [Total Marks : 70
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)
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
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Attachment: |
| Earning: Approval pending. |
