Pre University Board 2009 P.U.C Physics, Chemistry, Maths & Biology Chemistry - Question Paper
Code No. 34
[ Total No. of Printed Pages : 16
Total No. of Questions : 39 ]
March, 2009
( Kannada and English Versions )
Time : 3 Hours 15 Minutes ]
[ Max. Marks : 90
( Kannada Version )
ii) - A, B, C doJo D 0> d,4rt>;o >>,aFrt>b
' * 77 -0 CO y C*, C*, 5*
J O,e&.
_D
iii) - A do d2 0X@ 00 0d0J 10 0drt>3, - B do
d2 0X@ 2 0d0J 20 0drt>3, - C di d2
0X, 5 0drt>0J 40 0drt>3 )ri - D do D 1 10
0drt>0 D 2 d 0X, 5 0drt>0J 10
2 CO y 6
0drt$doJ d.
_D
iv) nJdod 0ro J,rt>3R doJO ,oeXdrart>3R ddoO.
- A
: i) 0> 10 d,2jn>oj J Ob.
co c c _o
ii) dnn 00 ddd 00 Jodrt>0R
10 X 1 = 10
1. dDl,l'a>0d drad dd d>J,deo ?
e) aO cp co rs co J
2. dod d< noydao Sod@rt,co dnda-ydradd $ft.
R
3. Cu + 1 do3o Cu 2 + (/ <d rart >S /ddo do doado3 d ?
-o co rs R c
4. & ,3d 0 ddrad a<>e&3>oSd nod 5i<& 0doj ?
5. ,dood,d aedo 273 K ho3 dado 3(dS doort d. aX ?
ZJ rs co -c
6. adora ,o<# dzaft.
7. odo dd$ ,dozo ,oZw 6. dd$ {ao a ?
8. xedede wd>@e>05* dPiftido ddsdoart yoftdrt dortd /ribd a<do d,0ft.
ot
9. d* ,ea<do 5rei*oart dF,od)ao. aX ?
10. dSY-d 40)eo d,0ft.
- B
,fi : i) /d)dd 0o drtR 30ft.
ii) dodo do 0ddo odrt>ocR doadod-
11. ,aoa<do wX,,d* dosb doAeftido wX,,d*rt> dd} &03o 0 on*>.dj*
t rcRc- cR co6
X\oocR do0. 0ddo dert>< zd dedd) 1500C Ao3 do 3o 3 do dddrraydddAd ?
rs co _o
12. dPiaftdoo dXdel da,drad), dPiaftdoo Sdadoart Sert drod ?
13. Iia" yadc (II) ,jeiY Xeoa,ed e d/ dO}adyaO ddd/ra ,oZ6 ( EAN ) dbD ya@aO d/S.
14. 0ddo S XX\Xrt> deedo ,od>e&rt ( LCAO ) >nadart ddd oX dS d,odX ddd/ra XX\Xrt> wXrt ft.
15. od d,dd )d2drtr S/ddoo 80 ddriS, eXd 50 ddrj dPrrtSd . w
S,<d<d dd ft daoXdd X, saS.
V cp ot, v
16. od wdr dadrad d/>d)dadd 0dd draoXjrartdR doQft.
17. od rtd d/> d,d pH doo 454. d [ H + ] . X, saS.
rs co tv
18. X>A ,deXdrad A, B, C dS D rt>d ddft :
CO 0 c
CH 3 - CH 2 - Cl CH 3 - CH 2 - OH CH 3 - COOH NaOH C
NaOH + CaO
heat D
19. d)|f S,db nodded ? ,ad/ deXdradd ddoO.
20. X>A S/drt> da,a<daX deXdrartd ddoO
i) yado ft!e dd@ $dX
ii) fty wd dd a,d,? doiaX ed>d* dJr
21. a - D - d/dje, sadsr da Jdd ddoO.
22. ||ftjdoOd dPiaftdo Sraad dadradoan yadoftdart oiadd dead} ad ? ,deXdradd, XS.
ot
- C
I. ti/>d)>dd) 0do drtrt ;O& : 2 x 5 = 10
23. a) ' aaod dati/ sdtio adO. 3
b) add lisyFad wXtioo ,otiooXod) drtort ti/d Oe3tio ,oXdrado odo d ? 2
c _0
24. a) aro-t aoo aedra aaod s,ed a<n> aoSrado en
deSdartoddo ? adO. 3
b) atioo >raoa dyas* ado d oO. - yao3etio rtorad )rtn ydradoart f. 2
25. a) ,doo ,otiooXort> dF-t ftropd ti/d)>dd dodo
dsds! rt>0 3
b) 0dy,t a< o d w>dd ded, dedd >a adO. 2
s) cp n
II. X> Ad)rt>, ti/d)3d dodo drtrt Oft : 3x5=15
26. a) dbdbOyt d O}>db 0oddeo ? do{,dt - CHO &ti/
cs> e) co J/
rtooty) ti/d Oe3tio dbdoOyt dOdbdo eO,d ? 2
b) d oea ,|eXdrad 3,ti/ odo adO. 3
27. a) Xed iad*aod o0r ert d,e3,d3rtod)do ? adO. 3
b) dd dd 0oddeo ? lidddon,, 0Oj 4 ort$d ? 2
28. a) dod&oJ, 0oddeo ? X>hd)rt>
do,,d/ortJ<oo JeO,oJ d ?
c _D
OH
Br C COOH
CH,
/d ,o00X.d) 2
H
Br C Br
CH
b) ddod o dert wh dOdr,e>rtod)do , aoeXd rad o doO.
2
c) od Xe, raod) yderae &<d/ rtoodo doad 0odo
JeO,oo odo dd,d<doaX S/dodd, Xa.
1
2
29. a) b)
c)
t 6
d3,daoX d0rt> ydrodo 3/do<doo adOb. dodo ,dd/
2
t
odo d>ee d0( ,odprar aoe dodo 0ddo d>e aoe <d>d,)doct dddoX>o,J.d do <d/d tfdo d0( whdoJd? 1
III. X>hd)rt> <d/>d)dddd dodo drtrt J.Ob
3 x 5 = 15
by wdo doJo ,>ea<doo blei aoradd doadod wao edo
co _o V c co
do drtr 3/do<do dd bdoXd ,aoeXdrad0 ad&b.
o doJo. >ar a<dododo, adOb.
J&, Xd 3,<d/ JoJ,do adOb.
Cp ZJ V t
30. a) b)
31. a)
4
1
djd1
3
b) ode ,d0 d,d/rad adoJ. 3ddo,d ,1 doJo. ddXeOy wdo dd,drart > db<X dObddrt dde ddrad dod Uorand doe 64 ao.n,o Jddo, end}rt>o,J d. 0dde ddraaod 5d J doJo
ZJ J v o ZJ or3 -f
d d ( S.T.P. ) 0do, ndJ,d oXdo dddodododo X, 3.
o co 0 V t tr
2
32. a) 5d 0ddo &o3rt>o 2
b) dodart, ddd ,oo ,oeXdrado ddoO. ,oeXdrad </d)dadda 0ddo ddrt>o dO. 2
c) od {o ,dod dOSd d, ( Dispersed phase ) doo dOXed d/d,wdort>o ( Dispersion medium ) S$. 1
33. a) 0ola,e& do daz. odo ddd) wrtaodart 0ola,e&o<
oiartod ddoad} ao ? 2
b) < 0od de ? do ert oiartod ? 2
c) V&X Xaedo daz. 1
34. a) Mg | Mg 21+m ) II Ag +1 m ) | AgXad
Eo Ag = 0-8 V dod Eo Mg = - 2-37 V wAd Xaed dooX
o _o O CO CO 0
d oiartod ddad}oo X@ saS. 2
b) &erao,' doda (ae&a daod </>d)dadda doado dSdad rt>0R Xas. 3
- D
D i
IV. X> Ad)n>, </>d)dadda o dn O : 1x10=10 35. a) {rod,' e,Qod d/Sod dasr >dado dO. 3 b) ,oX,dora daort>o sarta drt> oortsb dertddrXrt>o. aX ? dd} aes. 2
c) odo d3,j<daX SdS ddd dod dOd3rXd ,jd3(d X,do
y co y cp <A
odo ,d>deZ</Ado3d do3o ,j>d3d X,X, ,dojo3ddAdo3d. w
_o _o o4 u 0
S/dd S//drt f & ? o3 S/drt odo jd} xs.
2
- i
d) d>ea</ dd}<d 5ddooX ,3.d 298 K S - 166 kJ mol
' _o e) 6 co
wAdo3 d. w ,do & djoX K 0X, SjS.
s y cp cp p ci v
e) des* d?i, 0oddeo ?
2
1
36. a) b)
3
odo 54 nj,o wded/s* ,o<doXodo 612 nj,o ddo* XdAdod dj,drad doozjo3d jrt o3d dj,dXd doozjo3d od@ nj$ d,djdo jo,ojo3o. wrt dj,drad OjS 0708 njp do3o dj,dXd 0035 njp ddoj&oS, ouoo. sjnjdd wded/.s* ,oooX d rao Xdo 0 X, sjS.
6 -e ot u
2
Cl
3 +
2 +
do3 Zn
c) Al
(d,,o* d d* rao 3X = 740oo X,d).
/rt>o doadod jxdraX@ NH 4
do3o NH , OH n>o ,eojrt Al ( OH ) 3 d/3, 3 0,3 d. yjdra
4 3
CH 3 CH CH 2 COOH dd IUPAC
d) i)
Cl
ot
CH 3 CH CH 2 COOH
ii)
|
Cl
CH 3 CH 2 CH COOH |
Cl
d)rt>S /d)do o pKa dcdo >oad ?
2
e) CsCl dX XedS dod {j<X aodbrt> ( Lattice points ) 0do, ? 1
D
2
V. d/dddd 0rfo drtn JOb : 2x5=10
37. a) dert2>do l0e0d ert di>-d,,)l0eocR
Jd/O,>rtod)do ? ,&oeddrado ddoO. 3
b) ,3d/ dOeX\do0R ,Ob :
i) d&ert>o
ii) yerdeirt 2
38. &od, blel' wo/do &&doo d,ddo drtrd ,00abd0 00do Jeo,co 0d0 d/dertdrfo dOb. 5
* co y
39. d," dead00 ,el ddradrfo, ddeAb dPibd00 ddd/0rtel ( KMnO 4 ) d,d/rado 0doadood dertd,,
i) S/dodo d,3doaX ,oeXdrado ddoO.
ii) dPibdo0 ddd/0rtei" ,d/ JXdrfo, Xa.
iii) dde,od ,X dzd)do ?
iv) dooy do 0do 0i>rtod d d>d} ao ?
o co rs
v) Xdod dboed" ddradSdod dpibdo0 dd"d/0rtel dddo ( mass / dm3 ) dd d;,3dz)Jdo0d j X<o >,d Jdrfo, ddoO. 5
ii) Parts A, B, C and D are common to all the candidates.
iii) Part A carries 10 marks. Each question carries one mark. Part B carries 20 marks. Each question carries two marks.
Part C carries 40 marks. Each question carries five marks. In Part D D 1 carries 10 marks and D 2 carries 10 marks. Each question of D 2 carries five marks.
iv) Write balanced chemical equations and draw diagrams wherever necessary.
Note : i) Answer all the 10 questions.
ii) Questions have to be answered in one word or in one sentence each. Each question carries one mark.
10 x 1 = 10
1. What is the role of limestone in the extraction of iron from haematite ?
2. Hydrogen sulphide gas cannot be dried using conc. H 2 SO 4 . Give reason.
3. Which one among Cu + 1 and Cu 2 + salts is coloured ?
4. What is the limiting value of degree of dissociation of an electrolyte at infinite dilution ?
5. Sea-water freezes below 273 K. Why ?
6. Define electrophoresis.
7. The coordination number of a crystal is 6. What is the geometry of the crystal ?
8. Name the gas liberated when bromoethane is heated with alcoholic potash.
9. Phenol does not react with sodium bicarbonate. Why ?
10. Name the protein present in hair.
Note : i) Answer any ten questions.
ii) Each question carries two marks. 10 x 2 = 20
11. Draw Ellingham diagram for the formation of oxides of aluminium and magnesium. Which one of these metals acts as better reducing agent above 1500C ?
12. How does potassium dichromate solution react with potassium hydroxide ?
13. Calculate the EAN value of the central metal ion in tetramine copper (II) sulphate.
14. Sketch the shapes of bonding and antibonding molecular orbitals formed when two S orbitals undergo LCAO.
15. A first order reaction is 50% completed in 80 min. Calculate the rate constant of the reaction.
16. Mention any two characteristics of an ideal solution.
17. pH value of a sample of mango juice is 4-54. Calculate the [ H + ].
18. Identify A, B, C and D in the following equation :
CH 3 - CH 2 - Cl A CH 3 - CH 2 - OH B CH 3 - COOH NaOH C
NaOH + CaO
heat D .
19. What is Wurtz-Fittig reaction ? Write the general equation.
20. Write the equations for the following reactions :
i) Dry distillation of calcium acetate
ii) Reaction of phosphorous pentachloride with acetic acid.
21. Write the Haworth structure of a - D - maltose.
22. What happens when tristearin is heated with potassium hydroxide solution ? Give the equation.
I. Answer any two of the following questions : 2 x 5 = 10
23. a.) Describe the manufacture of ammonia by Habers process. 3
b) Sketch the shapes of nickel tetracarbonyl. Which type of hybridisation is involved in the formation of this compound ? 2
24. a) How is a mixture of noble gases separated by Dewars charcoal
method ? 3
b) Write the electronic configuration of lithium molecule. Comment on its magnetic property with reason. 2
25. a) State any three postulates of Werners theory of co-ordination
compounds. 3
b) On the basis of electron gas theory, explain bright lustre of metals. 2
II. Answer any three of the following questions : 3 x 5 = 15
26. a.) What is mesomeric effect ? What type of mesomeric effect is
shown by - CHO group in benzaldehyde ? 2
b) Explain the mechanism of nitration of benzene. 3
27. a) How is phenol isolated from coal tar ? 3
b) What is a dipeptide ? How many peptide linkages are present in a tetrapeptide ? 2
28. a.) What is optical activity ? Which one of the following compounds
shows optical isomerism ? 2
H OH
Br C Br Br C COOH
CH3 ch3
b) How is ethyl bromide converted into ethyl isocyanide ? Write the equation. 2
c) Give a chemical reaction to show that a molecule of glucose contains a carbonyl group. 1
29. a) Calculate angle strain in cyclobutane. 2
b) Explain carbylamine reaction for a primary amine. Write general equation. 2
c) One mole of a given amine consumes two moles of methyl iodide for exhaustive methylation. What type of amine is this ? 1
III. Answer any three of the following questions : 3 x 5 = 15
30. a) Derive an expression for rate constant of a first order reaction.
4
b) State Schultz-Hardy rule. 1
31. a) Explain buffer action in acidic buffer containing mixture of
acetic acid and sodium acetate. 3
b) When the same amount of electricity passed through solutions of copper sulphate and hydrochloric acid, 64 mg of copper is deposited on the cathode in the first case. Calculate the volume of hydrogen obtained in the second case at S.T.P.
( Equivalent weight of Cu = 32 ). 2
32. a.) Mention two limitations of standard hydrogen electrode. 2
b) Write Nernst equation for single electrode potential. Explain any two terms in the equation. 2
c) Mention the dispersed phase and dispersion medium in a gel.
1
33. a) Define entropy. What happens to entropy when a liquid
vaporises ? 2
b) What is Brownian movement ? How is it caused ? 2
c) Define unit cell. 1
34. a) Calculate the change in free energy for the cell
Mg I Mg 21+m ) II Ag (+1 m ) I Ag
if E o Ag = 0-8 V and E o Mg = - 2-37 V. 2
b) State any three postulates of Arrhenius theory of electrolytic dissociation. 3
PART - D D 1
IV. Answer any one of the following :
1 x 10 = 10
35. a.) Describe Parkes process for the desilverisation of Argentiferrous lead. 3
b) Why are transition elements and their compounds good catalysts ? Explain. 2
c) For a reaction, the graph of rate of the reaction against molar concentration of the reactant is a straight line parallel to the concentration axis. What is the order of this reaction ? Give an
example for such a reaction.
2
d) The value of standard free energy of formation of ammonia at 298 K is - 16-6 kJ mol - 1 . Calculate the equilibrium constant
2
K p for the reaction.
e) What is iodine value ?
1
36. a) Give the mechanism of Cannizzaros reaction.
3
b) A current of dry air was passed through a solution containing 5-4 g of an aromatic compound in 61-2 g of diethyl ether and then through the solvent. The loss in mass of solution bulb was 0-708 g and that in the solvent bulb was 0-035 g. Calculate the molecular weight of the aromatic compound.
( Given molecular weight of diethyl ether = 74 ) 2
When NH 4 Cl and NH 4 OH are added to a solution containing Al 3 + and Zn 1 + ions, only Al ( OH ) 3 precipitates. Give
c)
reason.
d) i) Write the IUPAC name of
CH 3 CH CH 2 COOH
Cl
ii) Out of CH 3 CH CH 2 COOH
Cl
and
CH 3 CH 2 CH COOH
Cl
which one has higher pKa value ?
2
e) How many Lattice points are present in a unit cell of CsCl ? 1
V. Answer any two of the following : 2 x 5 = 10
37. a) How is m-nitrobenzene prepared in the laboratory from
nitrobenzene ? Write the equation. 3
b) Mention a general test for
i) Protein
ii) Carbohydrate. 2
38. Describe an experiment to show that acid hydrolysis of methyl acetate follows first order kinetics. 5
39. For the estimation of potassium permanganate ( KMnO 4 ) using standard ferrous ammonium sulphate
i) Write the chemical equation for the reaction involved.
ii) Give the equivalent weight of potassium permanganate.
iii) Name the indicator used.
iv) What is the colour change at the end point ?
v) Write the equation for calculating mass / dm 3 of potassium permanganate in a given solution from its normality. 5
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