Tamil Nadu 11th Std Model Question Paper Chemistry

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No. of Printed Pages : 11
3422 (NS)
!3422NSIstYearChemistry! £vÄ Gs
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PART - III
÷Áv°¯À/CHEMISTRY
( uªÌ ©ØÖ® B[Q» ÁÈ / Tamil & English Version)

Põ» AÍÄ : 3.00 ©o ÷|µ® ] [ ö©õzu ©v¨ö£sPÒ : 70
Time Allowed : 3.00 Hours ] [Maximum Marks : 70

AÔÄøµPÒ : (1) AøÚzx ÂÚõUPЮ \›¯õP¨ £vÁõQ EÒÍuõ GߣuøÚ
\›£õºzxU öPõÒÍÄ®. Aa_¨£vÂÀ SøÓ°¸¨¤ß, AøÓU
PsPõo¨£õÍ›h® EhÚi¯õPz öu›ÂUPÄ®.
(2) }»® AÀ»x P¸¨¦ ø©°øÚ ©mk÷© GÊxÁuØS®
AiU÷PõikÁuØS® £¯ß£kzu ÷Ásk®. £h[PÒ ÁøµÁuØS
ö£ß]À £¯ß£kzuÄ®.
Instructions : (1) Check the question paper for fairness of printing. If there is any lack of
fairness, inform the Hall Supervisor immediately.
(2) Use Blue or Black ink to write and underline and pencil to draw diagrams.

SÔ¨¦ : ÷uøÁ¯õÚ ChzvÀ £h® Áøµ¢x \©ß£õkPøÍ GÊuÄ®.
Note : Draw diagrams and write equations wherever necessary.

£Sv & I / PART - I
SÔ¨¦ : (i) AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 15x1=15
(ii) öPõkUP¨£mkÒÍ ©õØÖ ÂøhPÎÀ ªPÄ® Hئøh¯
Âøhø¯z ÷uº¢öukzxU SÔ±mkhß Âøh°øÚ²® ÷\ºzx
GÊuÄ®.
Note : (i) Answer all the questions.
(ii) Choose the most appropriate answer from the given four alternatives and
write the option code and the corresponding answer.

[ v¸¨¦P / Turn over

3422 (NS) 2

1. GzuÚõ¼ß J¨¦ ‰»UTÖ {øÓ :
(A) 0.46 g (B) 4.6 g (C) 460 g (D) 46 g
The relative molecular mass of ethanol is :
(a) 0.46 g (b) 4.6 g (c) 460 g (d) 46 g

2. L -TmiÀ Põn¨£k® AvP£m\ G»UmµõßPÎß GsoUøP :

(A) 8 (B) 2 (C) 4 (D) 6
The maximum number of electrons that can be accommodated in L orbit is :
(a) 8 (b) 2 (c) 4 (d) 6

3. TØÖ : Psk¤iUP¨£mkÒÍ AøÚzx uÛ©[PÐÒ ï¼¯® AvP
A¯Û¯õUS® BØÓÀ ©v¨¤øÚ ö£ØÖÒÍx.
Põµn® : Psk¤iUP¨£mkÒÍ AøÚzx uÛ©[PÐÒ ï¼¯® AvP
G»Umµõß |õmh ©v¨¤øÚ ö£ØÖÒÍx.
(A) TØÖ ©ØÖ® Põµn® Cµsk® uÁÓõÚx.
(B) TØÖ ©ØÖ® Põµn® BQ¯ Cµsk® \›¯õÚøÁ, ÷©¾® Põµn©õÚx
TØÔØPõÚ \›¯õÚ ÂÍUP® BS®.
(C) TØÖ ©ØÖ® Põµn® BQ¯ Cµsk® \›¯õÚøÁ, BÚõÀ Põµn©õÚx
TØÔØPõÚ \›¯õÚ ÂÍUP® AÀ».
(D) TØÖ \›¯õÚx BÚõÀ Põµn® uÁÓõÚx.
Assertion : Helium has the highest value of ionisation energy among all the
elements known.
Reason : Helium has the highest value of electron affinity among all the
elements known.
(a) Both assertion and reason are false.
(b) Both assertion and reason are true and the reason is correct explanation for the
assertion.
(c) Both assertion and reason are true but the reason is not the correct explanation
for the assertion.
(d) Assertion is true and reason is false.

3 3422 (NS)

4. ‰»UTÔÝÒ {PÊ® øímµáß ¤øn¨¦ Põn¨£kÁx :
(A) Bºz÷uõ&ø|m÷µõ ¥ÚõÀ (B) £ÛUPmi
(C) }º (D) øímµáß ¦Ñøµk
Intra molecular hydrogen bonding is present in :
(a) Ortho-nitro phenol (b) Ice
(c) Water (d) Hydrogen fluoride

5. â¨\zvß Áõ´¨£õk :
(A) CaSO 4 (B) CaSO4.2H2O

(C) CaSO4. 1 H2O (D) CaSO4.H2O
2
Formula of Gypsum is :
(a) CaSO 4 (b) CaSO4.2H2O

1
(c) CaSO4. H O (d) CaSO4.H 2O
2 2

6. Áõ²UPÒ |À¼¯À¦ ußø© ö£ØÖ ö\¯À£kÁx :
(A) SøÓ¢u öÁ¨£{ø» ©ØÖ® SøÓ¢u AÊzu®
(B) AvP öÁ¨£{ø» ©ØÖ® AvP AÊzu®
(C) AvP öÁ¨£{ø» ©ØÖ® SøÓ¢u AÊzu®
(D) SøÓ¢u öÁ¨£{ø» ©ØÖ® AvP AÊzu®
Gases tend to behave ideally only at :
(a) Low temperature and low pressure
(b) High temperature and high pressure
(c) High temperature and low pressure
(d) Low temperature and high pressure

7. ¤ßÁ¸ÁÚÁØÖÒ Gx ÁÈa\õº¦ ?
(A) G (B) U (C) H (D) q
Among the following which is the path function ?
(a) G (b) U (c) H (d) q

[ v¸¨¦P / Turn over

3422 (NS) 4

8. RÌPshÁØÔÀ Gx \›¯õÚ TØÖ AÀ» ?
(A) öÁ¨£{ø»°øÚ ö£õÖzx \©{ø» ©õÔ¼ ©v¨¦PÒ ©õÖ£k®.
(B) \©{ø»°À EÒÍ J¸ Aø©¨¤ØS Q&ß ©v¨¦ G¨÷£õx® \©{ø»
©õÔ¼ø¯ Âh SøÓÁõP C¸US®.
(C) C¸ £UPzv¼¸¢x® \©{ø»°øÚ Aøh¯»õ®.
(D) ÂøÚ³UQ¯õÚx •ß÷ÚõUS ©ØÖ® ¤ß÷ÚõUS ÂøÚPøÍ
\©AÍÂÀ £õvUS®.
Which of the following is incorrect statement ?

(a) Equilibrium constant varies with temperature.

(b) For a system at equilibrium, Q is always less than the equilibrium constant.

(c) Equilibrium can be attained from either side of the reaction.

(d) Presence of catalyst affects both the forward reaction and reverse reaction to the
same extent.

9. Pøµ\¼ß \ÆÅk £µÁÀ AÊzuzøu (π) u¸® \©ß£õk :
(A) πRT=n (B) π=nRT
(C) πV=nRT (D) CÁØÔÀ HxªÀø»
Osmotic pressure (π) of a solution is given by the relation :

(a) πRT=n (b) π=nRT

(c) πV=nRT (d) None of these

10. ¤ßÁ¸ÁÚÁØÖÒ Gx G»Umµõß £ØÓõUSøÓa ÷\º©® ?
(A) NH3 (B) PH3 (C) (CH3)2 (D) BH3
Which of the following is electron deficient ?

(a) NH3 (b) PH3 (c) (CH3)2 (d) BH3

5 3422 (NS)

11. &Âß IUPAC ö£¯º :

(A) 1&£õºø©À ¦µ¨£ÚõÀ
(B) 1&øímµõUê ¤³mhÚÀ
(C) 2&øímµõUê ¤³mhÚÀ
(D) 3&øímµõUê ¤³mhÚÀ

Write the IUPAC name of .

(a) 1-formyl propanol
(b) 1-hydroxy butanal
(c) 2-hydroxy butanal
(d) 3-hydroxy butanal

12. n &¦µ¨ø£À ¦÷µõø©øh BÀPíõÀ P»¢u KOH Ehß ÂøÚ¨£mk
öPõk¨£x :
(A) ¤³møhÀ BÀPíõÀ (B) ¦µ¨¥ß
(C) ¥³miß (D) ¦µ¨ø£À BÀPíõÀ
n-propyl bromide on reaction with alcoholic KOH gives :
(a) Butyl alcohol (b) Propene
(c) Butene (d) Propyl alcohol

13. Sκ¢u }ºzu Põµ® P»¢u KMnO4 Gߣx :
(A) æ¨ Põµo (B) ö£ßhõßì Põµo
(C) hõ»ßì Põµo (D) ÷£¯º Põµo
Cold dilute alkaline KMnO4 is known as :
(a) Schiff’s reagent (b) Fenton’s reagent
(c) Tollen’s reagent (d) Baeyer’s reagent

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3422 (NS) 6

14. ö£õ¸zxP :
(1) A¯÷hõ£õº® (i) w¯øn¨£õß
(2) Põº£ß öhmµõ S÷Íõøµk (ii) §a]UöPõÀ¼
(3) CFC (iii) ¦øµuk¨£õß
(4) DDT (iv) Sκ\õuÚ¨ ö£mi
(A) (1)-(iii), (2)-(i), (3)-(iv), (4)-(ii)
(B) (1)-(ii), (2)-(iv), (3)-(i), (4)-(iii)
(C) (1)-(iii), (2)-(ii), (3)-(iv), (4)-(i)
(D) (1)-(i), (2)-(ii), (3)-(iii), (4)-(iv)
Match the following :

(1) Iodoform (i) Fire extinguisher

(2) Carbon tetrachloride (ii) Insecticide

(3) CFC (iii) Antiseptic

(4) DDT (iv) Refrigerants

(a) (1)-(iii), (2)-(i), (3)-(iv), (4)-(ii)

(b) (1)-(ii), (2)-(iv), (3)-(i), (4)-(iii)

(c) (1)-(iii), (2)-(ii), (3)-(iv), (4)-(i)

(d) (1)-(i), (2)-(ii), (3)-(iii), (4)-(iv)

15. K÷\õß £h» ]øuÄ E¸ÁõUSÁx :
(A) E»P öÁ¨£©¯©õuÀ (B) Põmkz w
(C) yº¢x÷£õuÀ (D) E°º ö£¸UP®
Ozone depletion will cause :

(a) Global warming (b) Forest fire

(c) Eutrophication (d) Bio-magnification

7 3422 (NS)

£Sv & II / PART - II
SÔ¨¦ : GøÁ÷¯Ý® BÖ ÂÚõUPÐUS Âøh¯ÎUPÄ® ÂÚõ Gs 24&US
Pmhõ¯©õP Âøh¯ÎUPÄ®. 6x2=12
Note : Answer any six questions. Question No. 24 is compulsory.

16. PõµzxÁ® Áøµ¯Ö. Bºz÷uõ&£õì£õ›U Aª»zvÀ Põn¨£k®
PõµzxÁzøu PshÔP.
Define basicity. Find the basicity of ortho-phosphoric acid.

17. i³mi›¯zvß £v½mk ÂøÚPøÍ GÊxP.
Write the exchange reactions of Deuterium.

18. öÁ¨£ C¯UP¯¼ß §ä⯠Âv°øÚ GÊxP.
State Zeroth Law of Thermodynamics.

19. J¸£izuõÚ \©{ø», £»£izuõÚ \©{ø» ÂÍUSP.
Explain homogeneous and heterogeneous equilibria.

20. BF3&ß ÁiÁ® ©ØÖ® ‰»UTÖ ÁiÁø©¨¦ GÊxP.
Write the shape and molecular geometry for BF3.

21. G¢u uÛ©® AvP£m\ \[Q¼ öuõhµõUP¨ £s¤øÚ ö£ØÖÒÍx ? Hß ?
Which element exhibits maximum catenation and why ?

22. ¦µ¨¥ÛÀ Põn¨£k® ¤øn¨¤À»õ EhÛø\Ä ÁiÁ[PøÍ GÊxP.
Write the no bond resonance structure shown by propene.

23. DDT&°ß Aø©¨¦ ©ØÖ® £¯ßPøÍ GÊxP.
Give the structure and uses of DDT.

24. \© BØÓÀ Eøh¯ Bº¤mhõÀPÎÀ, \›£õv¯ÍÄ ©ØÖ® •ÊÁx®
{µ¨£¨£mh Bº¤mhõÀPÒ, £Sv¯ÍÄ {µ¨£¨£mh Bº¤mhõÀPøÍ
Põmi¾® AvP {ø»¨¦ ußø© ö£ÖÁx Hß ?
In degenerate orbitals, why do the completely filled and half filled configurations are
more stable than the partially filled configuration ?

[ v¸¨¦P / Turn over

3422 (NS) 8

£Sv & III / PART - III
SÔ¨¦ : GøÁ÷¯Ý® BÖ ÂÚõUPÐUS Âøh¯ÎUPÄ®. ÂÚõ Gs 33&US
Pmhõ¯©õP Âøh¯ÎUPÄ®. 6x3=18
Note : Answer any six questions. Question No. 33 is compulsory.
25. öí´\ߣºUQß {a\¯©ØÓ ußø© ÷Põm£õmiøÚ Gkzx C¯®¦P.
State Heisenberg’s Uncertainty Principle.

26. £õ¼[ •øÓø¯ £¯ß£kzv A¯Û BµzvØPõÚ \©ß£õmiøÚ u¸Â.
Derive ionic radius using Pauling’s method.

27. £õµõ øímµáøÚ, Bºz÷uõ øímµáÚõP GÆÁõÖ ©õØÖÁõ´ ?
How do you convert para hydrogen into ortho hydrogen ?

28. ö£õ¸sø© \õº, ö£õ¸sø© \õµõ £s¦PøÍ ÷ÁÖ£kzxP.
Distinguish between extensive and intensive property.

29. 0.5÷©õÀ ö©zuÚõ»õÚx 1.5 ÷©õÀPÒ }¸hß P»UP¨£mkÒÍx.
AUPøµ\¼À EÒÍ ö©zuÚõÀ ©ØÖ® }›ß ÷©õÀ¤ßÚzøu PnUQkP.
Calculate the mole fraction of methanol and water when 0.5 mole of methanol is mixed
with 1.5 moles of water.

30. CÚUP»¨£õuÀ GßÓõÀ GßÚ ? CH4 ‰»UTÔÀ Põn¨£k® CÚP»¨¦
ÁøPø¯ SÔ¨¤kP.
What is hybridisation ? Mention the type of hybridization found in CH4.

31. Dzøuß ‰»UTÔÀ Põn¨£k® £»£i¯õUPÀ ÂøÚ°ß ÁøPPøÍ
ÂÍUSP.
Explain the different types of polymerisation in ethyne.

32. £_ø© SiÀ ÂøÍÄ GßÓõÀ GßÚ ? £_ø©SiÀ ÂøÍÂøÚ EshõUS®
Áõ²UPÎß ö£¯›øÚ SÔ¨¤kP.
What is green house effect ? Name the gases that cause green house effect.

33. 2-¥³mjÛÀ Põn¨£k® ÁiÁ©õØÔ¯[PøÍ GÊxP.
Explain geometrical isomerism in 2-butene.

9 3422 (NS)

£Sv & IV / PART - IV
SÔ¨¦ : AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 5x5=25
Note : Answer all the questions.

34. (A) 76.6% Põº£ß, 6.38% øímµáß, «u \uÃu® BUêáøÚ²® öPõsh
÷\º©zvß Gί ÂQu Áõ´¨£õk, ‰»UTÖ Áõ´¨£õk BQ¯ÁØøÓU
PõsP. ÷\º©zvß B Ahºzv 47.
AÀ»x
(B) (i) 3d ©ØÖ® 4f - Bº¤mhõÀPÎÀ Põn¨£k® Bµ ©ØÖ® ÷Põn
PqUPÎß GsoUøP°øÚU PnUQkP.
(ii) Be, N HÓzuõÇ §ä⯠G»Umµõß |õmhzøu ö£ØÖÒÍx Hß ?
(a) Calculate the empirical and molecular formula of a compound containing 76.6%
carbon, 6.38% of hydrogen and rest oxygen. Its vapour density is 47.
OR
(b) (i) Calculate the total number of angular nodes and radial nodes present in
3d and 4f orbitals.
(ii) Explain why the electron affinity of Be and N is almost zero.

35. (A) (i) øímµáøÚ B´ÁPzvÀ u¯õ›US® •øÓ°øÚ GÊxP.
(ii) Áõ²UPøÍ vµÁ©õUP £¯ß£k® £À÷ÁÖ •øÓPÎß ö£¯›øÚ
SÔ¨¤kP.
AÀ»x
(B) (i) \»øÁzyÒ (¤Ïa][ yÒ) GÆÁõÖ u¯õ›¨£õ´ ?
(ii) ö©UÜ]¯zvß £¯ßPøÍ GÊxP.
(iii) A•UPzvÓß Põµo (Z) &ØPõÚ Pou¯À Áõ´¨£õmiøÚ
GÊxP.
(a) (i) Write the laboratory method of preparation of hydrogen.
(ii) Name the different methods of liquefaction of gases.
OR
(b) (i) How is bleaching powder prepared ?
(ii) Write the uses of Magnesium.
(iii) Write the mathematical formula for compressibility factor ‘Z’.

[ v¸¨¦P / Turn over

3422 (NS) 10

36. (A) (i) J¸ |À¼¯À¦ Áõ²ÂØS ∆H &US® ∆U&US® Cøh÷¯ EÒÍ
öuõhºø£ Á¸Â.
(ii) ÂøÚ SnP® (Q) & Áøµ¯ÖUPÄ®.
AÀ»x
(B) (i) 08C öÁ¨£{ø»°À 1 ÷©õÀ £ÛUPmi }µõP E¸S®÷£õx {PÊ®
Gßm÷µõ¤ ©õØÓzøu PnUQkP. £ÛUPmi°ß ÷©õ»õº E¸SuÀ
öÁ¨£ ©v¨¦ 6008 Jmol−1.
(ii) ‰»UTÖ Bº¨¤mhõÀ öPõÒøP°ß P¸x÷PõÒPÒ H÷uÝ®
|õßQøÚ GÊxP.

(a) (i) Derive the relation between enthalpy ∆H and internal energy ∆U for an
ideal gas.
(ii) Define reaction quotient.
OR
(b) (i) Calculate the entropy change during the melting of one mole of ice into
water at 08C and 1 atm pressure. Enthalpy of fusion of ice is 6008 Jmol−1.
(ii) Write any four postulates of molecular orbital theory.

37. (A) (i) Áõsm íõL¨ Põµo ‘i’ GßÓõÀ GßÚ ?
(ii) §ºzv ö\´P.
ö£ß\õ±À
H 2 C = CH 2 + H − Br 
(A) →
ö£µõUø\k

(B) Aª»
CH 3 CHO →
øhS÷µõ÷©m

(C)

(D)

AÀ»x
(B) P›©zvh¨ ö£õ¸øÍz y´ø©¯õUS® £iP©õUPÀ •øÓø¯ ÂÍUSP.

11 3422 (NS)

(a) (i) What is Van’t Hoff factor ‘i’ ?
(ii) Complete :
(A) Benzoyl peroxide
H2 C = CH2 + H − Br 
→

(B) Acid dichromate
CH3CHO →

(C)

(D)

OR
(b) Explain the purification of a solid organic compound by crystallization method.

38. (A) (i) ¤ºU JkUP® GÊxP.
(ii) _ØÖa`ÇÀ ©õ_£õmøh Pmk¨£kzx® EzvPÒ ‰ßÔøÚ GÊxP.
AÀ»x
(B) ‰Âøn¯ ¤³møhÀ S÷Íõøµk, BÀPíõ¼À KOH •ßÛø»°À
{PÌzx® }UPÂøÚ°ß ÂøÚÁÈ•øÓø¯ ÂÍUSP.
(a) (i) Write Birch reduction.
(ii) Write any three strategies to control environmental pollution.
OR
(b) Explain the mechanism involved in the elimination reaction of tertiary butyl
chloride with alcoholic KOH.

-o0o-

[ v¸¨¦P / Turn over