Pre University Board 2008 " Chemistry " code 34 for englis version see page no 9 - Question Paper
Code No. 34
Total No. of Questions : 39 ] [ Total No. of Printed Pages : 15
March, 2008
( Kannada and English Versions )
Time : 3 Hours 15 Minutes ] [ Max. Marks : 90
( Kannada Version )
ii) - A, B, C D 0>
' * 77 -0 CO c c 6*
J
_D
iii) - A ( Sr 0x@ 0d0J 10 0drt>, - B (
S4r 0x@ 2 oXoJ 20 0drt>, - C ( Sr
oX, 5 0drt>0J 40 odrt>o - D ( D 1 10
odrt> D 2 mrtS 44 oX, 5 odrt>oJ 10
2 CT> y I 6
ondoJ
_D
iv) nJdo oro oJ ,&3eddrart>o doO.
- A
: i) 0> 10 J O&.
co _o
ii) oo s oo Jdrt>3R
d(oe&. 4 oo oddoJrf. 10 x 1 = 10
y y ct -e
1. doooo , ort,} /oro>rt 3,<d d(oo mrtS
CO &0 y y CO
2. e4 Xo4o4 4>4 oOoX, ( Compound ) ,O&.
3. Xe 4o Jo ,Jo o4rart><, </>4)4o yoeo X/J X4rt Frao J4 ?
4. 05 M n o 44 pH o ?
5. ,eoo Xs> edra 4j44 4d,dX J 44} Xe,~ 4j4$,o J "3,do J 4.
co e) J/ _d co J/u
X ?
6. o><oo Xedra* 4oJo 4Pi)oo Xedra 4drad< neo je 4)jnj,<o /4)d X4o ,o,ra ey3rtoJ4 ?
7. ,Soo Xedra , ,X {<X4 ,deo ?
8. ( CH 3 ) 3 N 4 d IUPAC ,-Or doO.
9. J ,<4 4rar4oJ 4/4o4 4,0 4o ,O.
e) c _o c
10. *,0s*, -o4 0d4o 4344*|ra ,d4$rt> 4o46 /4 Jd4 o doJ4 ?
- B
i) /4)44d 44lrt>Ol JO.
ii) 4xo4o 440 0d4o oXrt>oct oQcbJo4.
10 X 2 = 20
11. XQ4 J<o oto4 4X,ra ono&oJ J 4 4X4rrayO/AdoJ 4.
,
4o 0 on3.4j X,o ,><oQo4 4O.
ct co 6 <A
12. aido raodX.X deZ<d odeido doo. - y>oeid rtorao
* oOk c c
doo.
13. Xdo* y>r* dd/rao 0odeo ? a D ( + ) o5* wo, doo doo.
14. 5 wosied* o.o >o 56 ,o.&oe. 3 &&Xo STP o aortd rt$,oo
6 o =t =t co
ey>rto ,do<do XodSoo.
ot
15. 3i>oo pi>oo Xdoei* {rt ,eOn>rt wrto O}>oeo ?
16. rraOTrt ,X@d(d ( Non-reducing sugar ) 3*r dio doO.
17. rteo* od* 0odeo ? rteo* ,>o*n aX ,eo,od ?
oa oa
18. BCC ,X ( Radius ratio ) a ? d ,dooe ,oZ6 doo
( Geometry )
19. ,oX,dora dert> aX ,oooX ,oderarrt>o Xd d ?
_D c _D
20. ooo 3/o<d do>X eo :
i) nXe,*Y o - OH rtoortdo .
ii) wdo on>< dd/raort> ed ,do do d.
' CO 0
21. 3 n>,o. <d>o</o 9 n>,o. >eo XdAd. ,>eX, XSdo
y y co
( Relative lowering of vapour pressure ) XodSo.
22. X>A ,aoeXdra A, B, C doo D rt>o ndo :
CO 0 t
A B C C 2 H 6 - CH 3 CH 2 Cl - CH 3 CH 2 OH -
- C
I. X> Ad)rt> 0- tySn _p%, : 2 x 5 = 10
23. a) ty35F <Qo e,0 $,oo ( Desilverisation of lead )
* co & <=i
etyFQ,d -ado d0. b) X>A)rtn IUPAC ,do idoO :
Cu ( NH 3 ) 2( H 2 O ) 2
Cl 2
ii) Na 3 [ Fe ( Ox ) 3 ] . 3 + 2
24. a) X B>rao dys*1 SdO doO. 0 Xodo ( Bond
order ) XodO&QoO. X 00 X rao>< /d)0 0
d 00 X ?
cp >
b) nora* 0odeo ? ooeo noraM ( Polydentate ) oo >-} XQ. 3 + 2
25. a) Xel Q0>o S0 tysi>oo dXeoe&o ert p,oo
b) o,o,3 tyOodo e0,d oo dedo ,0. 4+1
6 6 ot ot
II. X> Ad)n>, /d)- odo tySn 0 : 3x5=15
26. a) oe , des* 3//odo d0.
b) iL(iraoct or< ,eQ(oo rasraoart ,e0>rt ano.d ?
i) yj<oo &lel doJo sSjoo o{eoe&o od@
ii) &56' wdo do do&Xd d oiX ed.ra {J ,eOd>rt.
' co c co d
iii) o0r dor wdd {Jrt ,eOd>rt
b) dedra dd doJo <oe,edO5 d,drt> ( Mesomeric effect ) do, dod d,J,,rt>o d oO. 3 + 2
28. a) S N 1 S//JoJd d O&.
b) oes*< dodo aodrtd 0odo ,doar doJo aodrto wCes, dod aodrtAoJ ed(/Ad 0odo odo dOeX do>X JeO. 3 + 2
29. a) dp< ,>ea<oo dXjoart oSra drdrt artod ?
Soo, dAdod S//JoJd dO.
b) od@drtod Jo ( Drying oils ) 0oddeo ? dX@ sdrart>eo ? 3 + 2
III. X> Ad)rt>, /d)dd dodo drt$n JO : 3 x 5 = 15
30. a) dddo 3//drtr A J ; S/xbo, A o wdod
odd) 9 mol/dm3 AdoJd. 30 >odd oJd dd odd) 45 mol/dm 3 Xad</rtoJ d. Ad 3,<o<o eXrai 80 rnrt dooAooo
-o n J *
J n doX>d ,d<odo XodoaoO.
v ot
b) odo S/oo den doXd do>d/d) mol/dm3 /s. sAd S/xb<o X,do ( Order ) & ? 3 + 2
31. a) yOe d>,drad dOraSdd dO.
b) H 2 O ( l ) H 2 O ( g ) d1 A H o = 44 kJ d J A S o = 1188 x 10 - 3 kJK - 1 wAdJd. eo3 dJ aed
_D _D
,d& <0 d3 n dd Jid dd, 3. 3 + 2
cp co co rs t u
32. a) drSeddra add rtjJ Jdd, dO. &3>od)
25C dJ<d 002 dd 001 M &56' wdd
ro co co co *
& doddd dod&soO dJ [ H + ] odJ <dd dd, 3.
Cp -0 1 J y tr
b) rteo" oct d,Sn" wd"@ dSod dert J/O,d ? 3 + 2
33. a) dea<dd ded d dJ 53<dFJoJdd dO.
-e ot
b) ,(do{>J d nodded ? dodortd dddd(db oJd"- ddAd ad ,,(do{>J d,3; ? 3 + 2
rs co o3 Z/y
34. a) od 3,<d<d dJ dJ dert coddd ,ooa,d ,oeddradd
y rs -c cp t * t
d ODO. W S/didd, d,O&.
b) d3>ol 3"-3o")F idddd dO. dd rtJ Jdd, dO.
c)
2 + 2 + 1
- D
D 1
IV. X>A)rt> C/ddd oo 4 JO : 1 x 10 = 10 35. a) 0 ( VBT ) CeA, >X@ I13-
y3raee ,oddrao 0 oJo yxeo riorao
c _D c
b) e rtora 0oddeo ? eooo ,/! e rtora4 12 x 10-10 wAdoJd. 3TOdd SeOoo ,1 >e0oart wrtod eJCoo XodoSoO.
ot
c) oe do o oe eora* wA ert d0dr,o0 ?
d) az>-zo 0odeo ? <* az>-/ dCo doO.
3 + 3 + 2 + 2
36. a) Mg|Mg 2 + || Ag + | Ag &ed,
ooor ( Standard free energy ) dodDroSO.
E Og = 0-8 V rfoJb E Mg = - 2-37 V.
Ag -0 Mg
b) X>A S/Cort ,oeddra d0 :
i) Xej 3,Co
ii) 3/Co
c) eoobR dedj dodoJ e a<rt> o,raaod ert ed rS,odo ?
D
2
V. X> Ad)rt> <zd)d) 0do tySn O : 2x5=10
37. a) led oeao doi-raled oe o tyenood ert
</O,oO ?
b) types* ty0eX\o0 dO. 3 + 2
38. typi&oo ty dd/l doo typi>oo <d,1rart> dd a,oo< do
dOdodo $,od d/ertdo dO. 5
39. Xjdod d- 3,dra 250 cm3 dod dsF deao ,<del <drad >Xdo wdSr ( Standard ) typiD&oo dOel 3,drad 0r d <>eA XodoQood >do dO. dd d<ood D,3oaX S,oo ,&oeXdrad0 X&Q. 5
( English Version )
Instructions : i) The question paper has four Parts.
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.
PART - A
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. Write the reaction which occurs in zone of combustion in the blast furnace during extraction of iron.
2. Name the first compound of a noble gas prepared by Bartlett.
3. Out of cobalt and zinc salts, which is attracted in the magnetic field ?
4. What is the pH of 0-5 M sulphuric acid ?
5. Why is the osmotic pressure of sodium chloride solution higher than glucose solution ?
6. Between aluminium chloride and potassium chloride, which one is required in minimum concentration to coagulate gold sol ?
7. Name the crystal lattice in sodium chloride crystal.
8. Write the IUPAC name of ( CH 3 ) 3 N.
9. Name the substance to decolourise an oil.
10. What type of linkage is present between the polypeptide chains of Insulin ?
Note : i) Answer any ten questions.
ii) Each question carries two marks. 10 x 2 = 20
11. At low temperature carbon monoxide is a better reducing agent than carbon. Explain with the help of Ellingham diagram.
12. Write the energy level diagram of Lithium molecule. Indicate the magnetic property of it.
13. What is Chiral carbon atom ? Write the structure of a D ( + ) Lactic acid.
14. Calculate the time required to liberate 56 cm 3 of hydrogen at STP, if 5 amperes of current flows.
15. What is the action of potassium hydroxide on potassium dichromate ?
16. Write the Haworth structure of a non-reducing sugar.
17. Define gold number. Why is Gelatin added to gold sol ?
18. What is the radius ratio-range of a BCC crystal ? Mention its coordination number and geometry.
19. Why do transition metals form complex compounds ?
20. Give a reaction to show that glucose contains
i) five - OH groups
ii) six carbon atoms in a straight chain.
21. 3 g of urea is dissolved in 9 g of water. Calculate the relative lowering of vapour pressure.
22. Identify the reagents A, B, C and D in the following conversions :
A B C C 2 H 6-- CH 3 CH 2 Cl-- CH 3 CH 2 OH--
CH 3 COOH CH 4
I. Answer any two of the following questions : 2 x 5 = 10
23. a.) Describe Parkes process of desilverisation of lead. b) Write the IUPAC names of the following :
i)
Cl 2
Cu ( NH 3 ) 2( H 2 O ) 2 &
ii) Na 3 [ Fe ( Ox ) 3 ] . 3 + 2
24. a.) Write the electronic configuration of oxygen molecule. Calculate the bond order. Between oxygen molecule and hydrogen molecule which is more stable and why ?
b) What is a ligand ? Give an example of polydentate ligand. 3 + 2
25. a) How is pure potassium dichromate manufactured from chromite
ore ?
b) Name a metal which shows photoelectric effect. 4 + 1
II. Answer any three of the following questions : 3 x 5 = 15
26. a.) Explain the mechanism of sulphonation of Benzene.
b) What happens when acetaldehyde is treated with dil. NaOH solution ? Write the equation. 3 + 2
27. a.) Write the equations for the following reactions :
i) Dry distillation of calcium acetate and calcium benzoate.
ii) Acetic acid is treated with phosphorus pentachloride.
iii) Phenol is treated with dil. Nitric acid.
b) Mention any two differences between mesomeric effect and inductive effect. 3 + 2
28. a.) Explain the mechanism of S N 1 reaction.
b) Give a reaction to show that benzene contains three double bonds. Mention a test to indicate that these double bonds are different from those of alkenes. 3 + 2
29. a.) What happens when Benzaldehyde is treated with strong
solution of sodium hydroxide ? Explain the mechanism involved in the reaction.
b)
3 + 2
What are drying oils ? What are the causes of it ?
30. a) For the first order reaction A products, the initial
concentration of A was found to be 9 mol/dm 3 . After 30 minutes, the concentration was reduced to 4-5 mol/dm 3 . Calculate the time required for 80% completion of the reaction.
b) The unit of velocity constant of a reaction is mol/dm 3 /s. What is the order of the reaction ? 3 + 2
31. a) Explain the buffer action of a basic buffer solution.
b) For a process H 2 O ( l ) H 2 O ( g ), A H o = 44 kJ and
A S o = 118-8 x 10 - 3 kJ K - 1 . Calculate the temperature at which water vapour and water are at equilibrium. 3 + 2
32. a) Write the mathematical form of Ostwalds dilution law. Calculate
the dissociation constant of 0-01 M acetic acid if the degree of dissociation at 25C is 0-02. Also calculate [ H + ] concentration.
b) Describe Bredigs arc method for preparation of gold sol. 3 + 2
33. a) Explain the construction and working of Daniel Cell.
b) What is spontaneous process ? Why is melting of ice a spontaneous process though it is endothermic ? 3 + 2
34. a) Write an equation which relates the rate constant and
temperature of a reaction. Name the reaction.
b) State vant Hoff-Charles law and write its mathematical form.
c) Give an example for Psuedo first order reaction.
2 + 2 + 1
IV. Answer any one of the following : 1 x 10 = 10
35. a) With the help of VBT explain the hybridisation in tetracarbonyl
nickel. Indicate the magnetic property of it.
b) Define solubility product. The solubility product of barium sulphate is 1-2 x 10 - 10 . Calculate the solubility of barium sulphate in water.
c) How do you convert methyl amine to methyl isocyanide ?
d) What is Zwitterion ? Write the structure of Zwitterion of alanine.
3 + 3 + 2 + 2
36. a) Calculate the change in standard free energy for the cell
Mg|Mg 2 + || Ag + | Ag.
EAg = 0-8 V and E Mg = - 2-37 V.
b) Explain the following reaction with equations :
i) Kolbes reaction
ii) Perkins reaction.
c) How is helium separated from the mixture of noble gases by Dewars method ?
d) Write Nernst equation. 3 + 4 + 2 + 1
V. Answer any two of the following : 2 x 5 = 10
37. a) How is m-dinitrobenzene prepared in the laboratory from
nitrobenzene ?
b) Explain the general test for proteins. 3 + 2
38. Describe an experiment to show the effect of temperature on the rate of the reaction of potassium persulphate and potassium iodide. 5
39. Describe the estimation of the amount of ferrous ammonium sulphate present in 250 cm 3 of the Mohrs solution using standard potassium dichromate solution. Give the equation. 5
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