Pre University Board 2010 P.U.C Physics, Chemistry, Maths & Biology Chemistry - Question Paper
Total No. of Questions : 39 ] Code No. 34
Total No. of Printed Pages : 15 ]
June/July, 2010
( Kannada and English Versions )
Time : 3 Hours 15 Minutes ]
[ Max. Marks : 90
( Kannada Version )
ii) - a, b, c oto d n> 44rt>o aro,an>o
' * 77 _o co y o*
t 0, edo.
_D
iii) - A o 0d@ 0 odot 10 0drt>0, - B o
0d@ 2 0d0t 20 0drt>0, - C 0 0d@
5 0dn>0t 40 0drt>0 - D 00 D . art 10 0drt>0
* CO 1
D_ art0 SLJ 0d, 5 0dn>0t 10 0drt$d0t
2 co y Ot V -c
iv) rttado 0, 0ro t,n > 0r ot , aoeddrart > o d o0.
- A
: i) 03 10 44 > r t 0&.
' co y t <=t _o
ii) 44rt$rt 00 0 00 d.0 t drt>o
' y cL CO * O CO _D <={,
doedo. 0 cdadot .
10 X 1 = 10
y y ot -o
1. aed aa0 J,e a<n> aoJ,rao >era,0OTrt ao) t0 Sq0 oe a Je} ?
2. ooeo 0na,odort$rt oo ad} aea.
6
3. siafto doei siafto daxoart oftoart , /rto Xeaoo ,oooX ,Oft.
_o Zs o =t
4. a6ddo adoa ,o aooo doO.
5. 0732 - 10 dod {aado oQdod ,X
,dooe ,oZ6 0Oj ?
6. adora ,o< 0odeo ?
7. oa,w ,o drtr 3,0 0odeo ?
8. ,eee So@ d oaXdSdod eaoo deoQrt &ft d/aari
doo ; ,do aea.
9. Xyd Xrra 5,oo0Y >eA,d XrrayadX /)o ?
10. wdedos* ortodadod oo os5e , Oft.
>ri - B
,<&: i) /}ad > 0 Oft.
ii) oo 0d do oXrt > o oadoo -
11. o d* Xad dd0Ye aX a&Srtoddo 0oodo 00,0ndj* X\o ,3oQod adOb.
12. ,3doo ,<0* dod) dPibodj* >deiaoQrt ert dr,od ?
, aoeXdrado doO.
<=t
13. /aeXdra , d/ortJ oo 3 d} oQrt ad Ob.
<=t
14. &e0odj* >raoa dod X\ d o0 doo dd 0, o eoo X@ d/a.
15. 3,/d nrd o a r0,od /d)3dd 0ddo ort > o doO.
16. ,od rar ,oZ , 0odde ? &dd ,drar , oZ ,oo Xa.
6 o <=t
17. 10 - 3 M odo dor< wdo HA oo d3,d rad0 43% /aeXdrart>o, d.
co j/ co v1 >
d d a>e&3 b ooXd o X, d/a.
Cp <=t u
18. d d3, dra d 0odde ?
19. &3,y* wdo do &e*aod ert dd ooao ? , aoeXdrado Xa.
ZJ co <={, * <={,
20. p-D ( + ) d//,* dr d oo d o0.
21. >eoo* o , > bdod /d)ddd 0ddo rtert>o aea.
22. drtoddeo ? odo , d> drf ,d/6 d3 ,do doO.
- C
I. X> ASd)rt>0 /d)d 0-d drt$n So& : 2 x 5 = 10
23. a) ,3oeXdra d/a Xed!* aoaod dPi&idj* ddeS, ert sa&ao ? , aoeXdrart > So, aea. 4
b) ed aon > airaaod xoS $adid dd o wd&S Xd so S n d<o d eA,id d3,3daX d , d Si , o&. 1
_0 c{,
24. a) S FS aS d} oXd addd 0r d D0. 2 b) ,oeXS (ded*j) o &roo3 wad0, lierao* aXd* ( O ) S 0 did , oXdrad Si, ad o&, dd wXdSi 3
co <={, 7 eJ <={,
25. a) > di , oXjdira Sbrt >i dSi d) ,odoXort > Si, SeX d3,3daX
3,drt > 0y dert d rXrt >3A d eAdd do. aX ? 2
b) 0d yS* a< &rooSd) dedd SoSb5e<S dSi d S,5e< S dra drrt > So, en ad odd) ? 2
c) d S addj*S n od S.drra & dSi d oO. 1
U Cp ot
II. X> AS d)n>0 d/d)3d dd: djSrt SoO& : 3 x 5 = 15
26. a) oedd*-ed* ddSi, 3d} oart ado&. 3
b) dedoy* dSi odj* dodrtS d/d)d 0ddo d ,s3.,n > So, xa. 2
6 6 <=i
27. a) oe ,eddra 3,dd 3,/oo aO. 3
b) ,eeeo wd@ei0eD piioQrt yiDoirt airtD4D ? , aDeXdraroo aea. 2
ot
28. a) X> 3,ort $rt , aoeddrart > o dDO :
i) yiD &lel dd iDerl ran > aDra Dr 400C n
ii) ,idDo ,eaDo rairaoan 2
b) 0 yd / rioo) ynr5j05 wo,rt> waD/D d oe a O}iD edo)D ? yidra aea. 2
c) dotg /)3d 0do >ertrt>o aea. 1
29. a) >0* wd, n ert f,o)d ? ,aoeddraD aea. 2
b) o 0odeo ? dd oD erto d>Q. 2
c) : aD6 , D&D ,%p . 1
iii. x> a )n>0 /)d odo o : 3 x 5 = 15
30. a) eaDo eaDo XedrtdDro yOeD d
orad d 6,ddd aO. 3
b) ,i/ /d 0}d o i d}doart . 2
a) dicJ wa d ao4o4o doO. d rt3
aea. 2
b) 4,4o 4rtr rooad a,o>od 4&oddra oo 566 kJ/mol. d0)0. 298 K 30 - 4ert aosod) 24 X 10 - 3 /min. wd, 308 K 340 4ert ao33od4o d, d&. ( R = 8314
CO <=t tr v
J/K/mol. ) 3
a) adrooad 0odeo ? - odo 4oodo aea. 2
32.
b) 5-6 pH do4 S,4ra /on> ,d3 00r dooaoO.2
c) HCO 31 d ,o00v doO.
1
a) doad oo & dood 0odeo ? do do doddoQrt ert ,oo4o oQ ? 2
33.
b) r d0<4o add a3Qo ert 3/O,oao ? 2
c) Bd ,ydrt9rt oo rod} da. 1
34.
a) wr sdra z43d> <addo rtora4orrt>oR aea. 2
b) a0e 33 rtora<4 o OT.z.a. A 2 B d/Oo ao3 a0e 33 <4ra
cp ot 6 6 2
a0e3 do3 a0e3 rtora< d, do4 ,oo4 d oO. 2
c) w&dod d &ood0 AS Uo}3v ddA d& aro0 w
' VQ ZS co O CO CO
5,ooo ,zoo-d,eO34hdo4)o ? 1
7 Code No. 34
- D
D 1
IV. X> Ad)rt>, /d)dsdd oo d, JO : 1 x 10 = 10 35. a) d,e&* 0Xd?ra d doJo y3orad3do adO. -odo ao aea. 4 b) draddo dom aoaod doro orad Xy dddo* , aoeddradoart ad o&. 2
c) :
i) Xj-30 Xeod,
ii) {aoo , d/ort J . 2
d) &dd) 4,0 wrt -roAd. ad O&. 2
36. a) Bdrooddo dz. d,ddo drtr 3,oo ,rood) ddJrdd wdo$d dJ o doe doo&JroAo dooddo JeO. 3
* co {,
b) 298 K Jdd, Zn|Zn + 2 doJo Mg|Mg 2 + 0 drtdo ,oe J/Od adoJed & dood odo d@ d/a.
( dJ : E 0 = - 0-76 V do Jo E = - 237 V ) 2
V -0 Zn -o Mg ,/
c) wdo ddo aod?* wa ert dOdr,oaO ? , aoeddraddo da.2
' CO t * t
d) wd dd\d doJd /d)d,dd dodo rt,eJrt>doR d oO. 3
D
2
V. d)rt>0 /d)dadd Oft : 2 x 5 = 10
37. a) ieoeaod doiadieoeo dertsao<), ert
& /O, oarto d ? 3
_D
b) XJe0 d OeX\o0R ad Oft. 2
38. dsiaftoo d d*, <ei doo dpiaftoo rfd(Sdri> dod ra 3000,
6,/dn d doed ,ad o d O}adodo JeO,od d,en d o ad Oft. 5
39. d,d/raX wyajSs wdod dajdrado defift dpiaftoo ddd/orte&o Xodoaood d.ertdS,
ZJ crP
i) w soo d,aoaX , aoeXdrado doO.
ii) dpiaftodj ddd/ortei , d/ ddao $ft.
iii) d efiftd ,Xd Or , Oft.
iv) 3,dd o,d wrtod ra d doad }oo d oO.
v) Xjdod 250 cm 3 d d ftaoed daxdrad0,dDd dpiaftoo ddd/ortei d,d6da&oo dd dd/Jood X@ saXco >,d ,do d oO. 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 ten 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. At what temperature is neon adsorbed on charcoal in the separation of noble gases by Dewar's method ?
2. Give an example for polydentate ligands.
3. Name the chromium compound formed when potassium dichromate solution is treated with potassium hydroxide.
4. State Faraday's first law of electrolysis.
5. What is the co-ordination number of each ion, for a crystal that has radius ratio between 0-732 - 1-0 ?
6. What is electrophoresis ?
7. What is Pseudo first order reaction ?
8. Name the main product formed when bromoethane is heated with sodium metal in dry ether.
9. What is the reducing agent used in Clemmensen's reduction ?
10. Name an amino acid containing aromatic ring.
Note : i) Answer any ten questions.
ii) Each question carries two marks. 10 x 2 = 20
11. With the help of Ellingham diagram, explain why oxide of silver can be thermally decomposed at relatively lower temperature.
12. How does concentrated sulphuric acid react with potassium iodide ? Write the equation.
13. Explain ionisation isomerism with an example.
14. Write the energy level diagram for helium molecule and calculate the bond order in it.
15. Write any two factors deciding the order of a reaction.
16. What is gold number ? Give the gold number of starch.
17. A weak acid HA dissociates to an extent of 4-3% in a 10 - 3 M solution of it. Calculate its dissociation constant.
18. What is osmotic pressure ?
19. How is picric acid obtained from phenol ? Give the equation.
20. Write the Haworth's structure of p-D ( + ) maltose.
21. Give any two postulates of Baeyer's strain theory.
22. What are triglycerides ? Write the general formula of a simple triglyceride.
I. Answer any two of the following questions : 2 x 5 = 10
23. a) How is potassium dichromate manufactured from concentrated
chromite ore ? Give the equations. 4
b) Name the chemical used to remove the last traces of oxygen from a mixture of noble gases. 1
24. a) State Nernst distribution law. 2
b) On the basis of valence bond theory, explain the hybridisation in tetracarbonyl nickel ( O ). Indicate the geometry of it. 3
25. a) Many transition metals and their compounds are used as
catalysts in several chemical reactions. Why ? 2
b) How does electron gas theory explain the malleability and ductility of metals ? 2
c) Write the highest oxidation state of Vanadium. 1
II. Answer any three of the following questions : 3 x 5 = 15
26. a) Explain Reimer-Tiemann reaction with an example. 3
b) Give any two differences between mesomeric and inductive effects. 2
27. a) Explain the mechanism of nitration of benzene. 3
b) What happens when bromoethane is heated with alcoholic potash ? Give the equation. 2
28. a) Write the equations for the following reactions :
i) a mixture of calcium acetate and calcium formate crystals are dry distilled at 400C.
ii) Benzaldehyde is treated with concentrated sodium
hydroxide solution. 2
b) What is the effect of electron releasing groups on the acidity of carboxylic acids ? Give reason. 2
c) Give any two uses of methanal. 1
29. a) How does nitrous acid react with aniline ? Give the equation. 2
b) What is a drying oil ? Mention one use of it. 2
c) Define the term 'isoelectric point'. 1
III. Answer any three of the following questions : 3 x 5 = 15
30. a) Explain the buffer action of a basic buffer containing ammonium
hydroxide and ammonium chloride. 3
b) Define common ion effect with an example. 2
31. a) State Raoult's law of relative lowering of vapour pressure. Give
the mathematical form of it. 2
b) Energy of activation of a first order reaction is 56-6 kJ/mol. If its rate constant at 298K is 2-4 x 10 - 3 /min, calculate the rate constant at 308K. ( R = 8-314 J/K/mol. ). 3
32. a) What is an electrochemical series ? Give one application of it. 2
b) Calculate the hydrogen ion concentration of a solution whose pH is 5-6. 2
c) Write the conjuate base of HCO 31 . 1
33. a) What is standard free energy change of a chemical reaction ?
How is it related to the equilibrium constant ? 2
b) How is gold sol prepared by Bredig's electric arc method ? 2
c) Give an example for molecular crystals. 1
34. a) Give any two characteristics of an ideal solution. 2
b) Define solubility product. Write the relationship between
solubility and solubility product of a sparingly soluble salt of the type A 2 B. 2
c) Under what condition, an exothermic reaction will be spontaneous, if AS is negative ? 1
IV. Answer any one of the following : 1 x 10 = 10
35. a) Explain the construction and working of standard hydrogen
electrode. Give one limitation of it. 4
b) Explain with equation, the role of limestone in the extraction of iron from haematite ore. 2
c) Define the following : 2
i) Chirality centre
ii) Geometrical isomerism.
d) Carbohydrate is a source of energy. Explain. 2
36. a) Define the term 'half-life period'. Show that the half-life period of a first order reaction is independent of initial concentration of the reactant. 3
b) Calculate the standard free energy change of a cell prepared by combining Zn | Zn + 2 and Mg | Mg + 2 electrodes at 298K.
( Given : E = - 0-76V ; E = - 2-37V ) 2
Zn Mg
c) How would you convert acetic acid to methane ? Give the equations. 2
d) Give any three salient features of molecular orbital theory. 3
D 2
V. Answer any two of the following questions : 2 5 = 10
37. a) How is m-dinitrobenzene prepared in the laboratory from
nitrobenzene ? 3
b) Explain Acrolein test. 2
38. Describe an experiment to show the effect of concentration on the rate of the reaction between potassium persulphate and potassium
iodide.
5
39. For the estimation of potassium permanganate using standard oxalic acid solution
i) write the chemical equation for the reaction involved.
ii) give the equivalent mass of potassium permanganate.
iii) name the indicator used.
iv) write the colour change at the end point.
permanganate present in 250 cm 3 of the solution from its
5
normality.
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