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8/3/2019 Chemistry JUL 2006 Eng
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9
(EnJlish,Venlon )
CodeNo. 34~NS
Instructions: 1 ) The question paper has four Parts.
11) Part A carries 10 marks. Each question carries one mark. .
Part B carries 20 marks. Each question carrtes two marks.
Part C carries 40marks. Each question carrtes five marks.
In Part D- D 1 carries 10 marks and D 2 carries
10marks. Each question ofD2 carrtes ftve marks.
ill) Write balanced chemical equations and draw diagrams
wherever necessary.
PART-A
Note: 1 ) Answerall the 10questions.
11) Questions have to be answered inone word or inone
sentence each. Each question carries one mark,
10 x 1 = 10
1. Name the catalyst used inthe contact process.
2. Givean examplefor bidentate ligand.
3. WriteelectronicconfigurationofHelium molecule.
4. Givethe conditionfor an alkene to exhibit gecmetrtcal Jsomertsm.
5. WhichIsthe.most reactive cycloalkane?
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CodeNo. 34-NS 10
,6. Giveequation for converting methyl iodide to Grignard reagent.
7. Givethe formula of alanine.
8. Which is the conjugate acid 0(S2-?
9. What is a semipermeable membrane?
10. .How is half-lifeperiod,ofa reaction related to the order?
PART-B
Note: j) Answer any ten questions.
:Ii) Each question carries twomarks. 10 x 2 = 20
11. Metal oxides are unstable at high temperatures. Explain using "Ellingham
diagram".
12. Give the IUPACname qf K 4 [ Fe (CN) 6 ] . What is the co-ordination
number of the central metal ion init ?
13. Explain dehydrating property of concentrated sulphuric acid with an
example.
14. What is Clemmensen reduction? Giveone example.
15. Give the IUPACnames of
j) CH3 - NH- C2H 5
il ) ,CH3COCH3 •
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11 Code No. 34-NS}\~
16. How do you convert isopropyl chloride to propene? Give equation.
17. What is a triglyceride? Give the general structure of a simple triglyceride. ;
18~ Mention two differences between colloids and true solutions. -,
19. Give two limitations ofArrhenius theory of electrolytic dissociation.
20. State Hardy-Schulze rule.
21. Rate constant of a reaction doubles when the temperature is increased
from 27°C to 37°C. Calculate the energy of activation of the reaction.
22. Define entropy. Give its SI unit.
v'
PART-C
I. Answer any two of the following : ,2 x 5 = 10
23. a)
b)
Explain dsp 2 hybridisation incuprammonium sulphate.
Calculate the EANof Iron inK3 [ Fe (CN) 6 ] . 3+2
24. a) Explain Ramsay Rayleigh's method for the isolation of noble
gases from air.
b) "Give two important differences between bonding and
antibonding molecular orbitals. 3 + 2
25. a) How is Ammonia manufactured by Haber's process?
b) What is the function of limestone and coke in the smelting of
Haematite ? 4 + 1
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12
. II.. Answer.any three ofthe following:~
3x5=15
26. a) Explainthe mechanism ofnttratton ofbenzene.
b) What Isnegative inductive effect? Giveone example, 3+2
27. a) HowIs phenolmanufactured from·cumene?
b). Howis propane prepared byWurtz r~ction ? 3+2
28. a) Howdoyou convert
1 ) phenol to salicylaldehyde?
ti ) aceticacid to acetamide ?
b) What is denaturation ofprotein ? 4 + 1
29. a) Elucidate the open chain structure ofglucose.
b)Explatn Aldolcondensationwith an example. 3+2
III. Answer any three ofthe following: 3 x 5 = 15
30. a)' Define standard electrode potential .. Calculate the electrode
potential of copper electrode dipped in0·1 MCuSO4 at 25°C.
oE Ou = = 0·34 v.
. b) Derive the equation of Ostwald's dilution law for a weak
electrolyte. 3+2
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13
31. a) State the Second law of thermodynamics.
.CodeNo. 34,.NS
b) How is the relative lowering of vapour pressure of a solution
determined by Ostwald and Walker's dynamic method? 1 + 4-
32. a) State Faraday's Second law of electrolysis.
b) Calculate the pH of 0·001 M formic acid, if its dissociation
constant Ka is 1·77 X 10-4 at 298 K.
." c) What are Lewisacids ? 2+2+1
33. a) Explain the buffer action of a basic buffer solution made of
NH4 OH and NH4Cl.
b) Explain Electrophoresis. 3+2
34. a) Discuss ·the application of common ion effect and solubility
product ( K 5P 1 in the selective precipitation of fourth group
basic radicals.
b) Define osmotic pressure. Write van't Hoffs equation for osmotic.
pressure. 3+2
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.Code No. 34-NS 14
PART-D
IV. Answer anyone of the following: 1 x 10 = 10
35. a) i) Explainthe diamagnetic behaviour ofzinc.
11) Name the metal used in the extraction of Ag -from
argenttferrous lead by Parke's process. 2 + 1
b) i) Write.the unit cell ofa body centred cube (BCCl.Calculate
the number of particles per unit cell.
11) What is the pH of 10-2 MNaOH? 3 + 1
c) i) What is a chiral carbon atom?
11) Explain the action ofnitrous acid onmethylamine. 1+ 2
36. a) Write the energy leveldiagram of'oxygenmolecule. Show that it
is a paramagnetic molecule. 3·
b) What is a dipeptide? Write its structure. 2
c) i) A first order reaction .is half complete in. 46 mmutes.
.~
Calculate the time taken for 250/0 completion of the
reaction.
11). What is pseudo first order reaction ? Giveone example.
3+2
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15 CodeNo.34-NS
V. Answerany two of the following: 2 x 5 = 10
37. a) Howis p-bromo-acetanilideis prepared in the laboratory from
aeetanfhde ?
b) Howis Biuret test conducted? 3+2
38. Describe the experiment to show that acid hydrolysis of methyl
acetate followskinetics offirst order: . 5
39. How wiil you estimate the amount of potassium permanganate
~dtssolved in 1 dm 3 of the solution using standard oxalic acid
solution? Writeequation forthe reaction. 5