TN 11th Question Paper 2023 Chemistry

Tamil Nadu
State Board

2023
QUESTION
PAPER

No. of Printed Pages : 11
6722
£vÄ Gs
A Register Number

!6722IstYearChemistry!
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

6722 2

1. S÷Íõ÷µõL£õº®, ø|m›U Aª»zxhß ÂøÚ¦›¢x u¸Áx :
(A) S÷Íõ÷µõ ¤U›ß (B) ø|m÷µõ öhõ¾Ãß
(C) S÷Íõ÷µõ ¤U›U Aª»® (D) ø|m÷µõ QÎ\›ß
Chloroform reacts with Nitric acid to produce :
(a) Chloropicrin (b) Nitro toluene
(c) Chloropicric acid (d) Nitro glycerine

2. ÷\õi¯® __________ À ÷\ªUP¨£kQÓx.
(A) ©sönsön´ (B) BÀPíõÀ
(C) Dzuº (D) }º
Sodium is stored in __________.
(a) Kerosene (b) Alcohol
(c) Ether (d) Water

3. Pøµ\¼ß \ÆÅk £µÁÀ AÊzuzøu (π) u¸® \©ß£õk :
(A) πv=nRT (B) πRT=n
(C) π=nRT (D) CÁØÔÀ HxªÀø»
Osmotic pressure (π) of a solution is given by the equation :
(a) πv=nRT (b) πRT=n
(c) π=nRT (d) none of these

4. ÷\º©zvß IUPAC ö£¯º :

(A) öíUì−2−Dß−4−BÀ (B) öíUì−4−Dß−2−BÀ
(C) öíUì−2−Dß−4−AÀ (D) öíUì−4−Dß−2−AÀ
The IUPAC name of the compound

:

(a) hex-2-en-4-ol (b) hex-4-en-2-ol
(c) hex-2-en-4-al (d) hex-4-en-2-al

A

3 6722

5. −I ÂøÍÂøÚ PõmkÁx :

(A) −Cl (B) −Br (C) (A) ©ØÖ® (B) (D) −CH3
−I effect is shown by :
(a) −Cl (b) −Br (c) both (a) and (b) (d) −CH3

6. ¤ßÁ¸ÁÚÁØÖÒ Gzv½ÛÀ (C2H4) Põn¨£k® Põº£ß \uÃuzvØS \©©õÚ
Põº£ß \uÃuzøu ö£ØÖÒÍx Gx ?
(A) ö£ß^ß (B) ¦µ¨¥ß (C) Dz÷uß (D) Dzøuß
Which of the following compound has percentage of Carbon same as that in Ethylene
(C2H4) ?
(a) Benzene (b) Propene (c) Ethane (d) Ethyne

7. PÚ}›ß [D2O] öPõv{ø» __________.
(A) 375.4 K (B) 373.4 K (C) 376.2 K (D) 374.4 K
The boiling point of heavy water [D2O] is __________.
(a) 375.4 K (b) 373.4 K (c) 376.2 K (d) 374.4 K

8. ¤ßÁ¸ÁÚÁØÖÒ Gx öÁ¨£ C¯UP¯À \õº¦ AÀ» ?
(A) Gßm÷µõ¤ (B) AP BØÓÀ
(C) Eµõ´Ä BØÓÀ (D) GßuõÀ¤
Which of the following is not a thermodynamic function ?
(a) entropy (b) internal energy
(c) frictional energy (d) enthalpy

9. ©øÇ}›ß pH ©v¨¦ :
(A) 5.6 (B) 6.5 (C) 4.6 (D) 7.5
The pH of Normal rain water is :

(a) 5.6 (b) 6.5 (c) 4.6 (d) 7.5

A [ v¸¨¦P / Turn over

6722 4

10. ¤ßÁ¸ÁÚÁØÖÒ A÷µõ÷©miU ußø©ø¯ ö£ØÖÒÍx Gx ?

(A) (B)

(C) (D) (A) ©ØÖ® (B)

Which one of the following is aromatic ?

(a) (b)

(c) (d) both (a) and (b)

11. n=3 GßÓ •ußø©U SÁõsh® Gsøn¨ ö£ØÔ¸US® Bº¤mhõÀPÎß
ö©õzu GsoUøP :

(A) 5 (B) 9 (C) 7 (D) 8

The total number of orbitals associated with the Principal Quantum Number n=3
is :

(a) 5 (b) 9 (c) 7 (d) 8

A

5 6722

12. TØÖ (A) : BU]áß ‰»UTÖ £õµõ Põ¢uz ußø© öPõshx.
Põµn® (R) : Auß ¤øn¨¦ ‰»UTÖ Bº¤mhõ¼À Cµsk uÛzu
G»UmµõßPÒ Põn¨£kQßÓÚ.
(A) TØÖ (A) \› BÚõÀ Põµn® (R) uÁÖ.
(B) TØÖ (A) ©ØÖ® Põµn® (R) Cµsk® \› ÷©¾® Põµn® (R) BÚx TØÖ
(A) &UPõÚ \›¯õÚ ÂÍUP® BS®.

(C) TØÖ (A) ©ØÖ® Põµn® (R) Cµsk® uÁÖ.
(D) TØÖ (A) ©ØÖ® Põµn® (R) Cµsk® \› BÚõÀ Põµn® (R) BÚx TØÖ
(A) &UPõÚ \›¯õÚ ÂÍUP©À».
Assertion : Oxygen molecule is Paramagnetic.
Reason : It has two unpaired electrons in its bonding molecular orbital.
(a) Assertion is true but reason is false.
(b) Both assertion and reason are true and reason is the correct explanation of
assertion.
(c) Both assertion and reason are false.
(d) Both assertion and reason are true but reason is not the correct explanation
of assertion.

13. Aq Gs 222 &I öPõsh uÛ©zvß IUPAC ö£¯º GßÚÁõP C¸US® ?
(A) didibium (B) bibibiium (C) bibibium (D) bididium
What would be the IUPAC name for an element with atomic number 222 ?
(a) didibium (b) bibibiium (c) bibibium (d) bididium

14. \© öÁ¨£, AÊzu {ø»°À, J¸ SÔ¨¤mh Áõ²Âß ÂµÄuÀ Ãu®,
ø|mµáøÚU Põmi¾® 0.5 ©h[S AvP® GÛÀ AUSÔ¨¤mh Áõ²Âß ÷©õ»õº
{øÓ __________.
(A) 114 g mol−1 (B) 112 g mol−1 (C) 120 g mol−1 (D) 110 g mol−1
An unknown gas diffuses at a rate of 0.5 times that of Nitrogen at the same
temperature and pressure. The molar mass of the unknown gas is __________.

(a) 114 g mol−1 (b) 112 g mol−1 (c) 120 g mol−1 (d) 110 g mol−1

A [ v¸¨¦P / Turn over

6722 6

15. Sκ¢u }›À Põº£ß&øh&BUøék Áõ²Âß PøµvÓøÚ GÆÁõÖ
AvP›UP»õ® ?
(A) AÊzuzvøÚ SøÓzx (B) PÚ AÍÂøÚ AvP›zx
(C) AÊzuzvøÚ AvP›zx (D) CÁØÔÀ HxªÀø»
Solubility of carbon-di-oxide gas in cold water can be increased by :
(a) decrease in pressure (b) increase in volume
(c) increase in pressure (d) none of these

£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. BU]á÷ÚØÓ® ©ØÖ® BU]áß JkUP® – ÷ÁÖ£kzxP.
Distinguish between oxidation and reduction.

17. öí´\ߣºUQß {a\¯©ØÓz ußø© ÷Põm£õmiøÚU TÖP.
State Heisenberg’s Uncertainty principle.

18. £õŸì \õ¢xÂß £¯ßPøÍU SÔ¨¤kP.
Mention the uses of Plaster of Paris.

19. ½&\õm¼¯›ß uzxÁzvøÚU TÖP.
State Le-Chatelier principle.

20. \ÆÅk £µÁÀ AÊzu® – Áøµ¯ÖUPÄ®.

Define Osmotic Pressure.

A

7 6722

21. ¤ßÁ¸ÁÚÁØÔØS ¿°ì Aø©¨ø£ ÁøµP.
(i) H2 O (ii) HNO3

Draw the Lewis structure for :
(i) H2 O (ii) HNO3

22. ¤ŸhÀ&Qµõ¨m ÂøÚø¯¨ £ØÔ ]Ö SÔ¨¦ GÊxP.
Write short notes on Friedel Craft’s Reaction.

23. xPÒ ©õ_£kzvPÒ GßÓõÀ GßÚ ? GkzxUPõmk u¸P.
What are Particulate Pollutants ? Give example.

24. 08C öÁ¨£{ø»°À 1 ÷©õÀ £ÛUPmi }µõP E¸S® ÷£õx {PÊ® Gßm÷µõ¤
©õØÓzøuU PnUQkP. £ÛUPmi°ß ÷©õ»õº E¸SuÀ öÁ¨£ ©v¨¦
6008 J mol−1.

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 J mol−1.

£Sv & III / PART - III
SÔ¨¦ : GøÁ÷¯Ý® BÖ ÂÚõUPÐUS Âøh¯ÎUPÄ®. ÂÚõ Gs 33 &US
6x3=18
Pmhõ¯©õP Âøh¯ÎUPÄ®.
Note : Answer any six questions. Question No. 33 is Compulsory.

25. BUêá÷ÚØÓ Gs •øÓ°À ¤ßÁ¸® ÂøÚPøÍ \©ß ö\´P.
(i) KMnO4+Na2SO3 → MnO2+Na2SO4+KOH

(ii) Cu+HNO3 → Cu(NO3)2+NO2+H2O
Balance the following equations by Oxidation Number Method.
(i) KMnO4+Na2SO3 → MnO2+Na2SO4+KOH

(ii) Cu+HNO3 → Cu(NO3)2+NO2+H2O

A [ v¸¨¦P / Turn over

6722 8

26. •ußø© SÁõsh® Gs £ØÔ ]Ö SÔ¨¦ ÁøµP.
Write short notes on Principal Quantum Number.

27. ‰ø»Âmh öuõhº¤øÚ ÂÁ›UPÄ®.
Explain the Diagonal Relationship.

28. £õµõ øímµáøÚ GÆÁõÖ Bºz÷uõ øímµáÚõP ©õØÖÁõ´ ?
How do you convert Para hydrogen into Ortho hydrogen ?

29. |À¼¯À¦ Áõ²a \©ß£õmøh Á¸Â.
Derive Ideal Gas equation.

30. {ø»a\õº¦PÒ ©ØÖ® ÁÈa\õº¦PÒ GßÓõÀ GßÚ ? Cµsk GkzxUPõmkPÒ
u¸P.
What are State and Path Functions ? Give two examples.

31. C 2 H 5 Cl GßÓ ‰»UTÖ Áõ´£õk Eøh¯ (A) GßÓ ÷\º©® }›¯ KOH Ehß
ÂøÚ¦›¢x (B) GßÓ ÷\º©zøu²®, BÀPíõÀ P»¢u KOH Ehß ÂøÚ¦›¢x
(C) GßÓ ÷\º©zøu²® u¸QßÓÚ. (A), (B) ©ØÖ® (C) &IU PshÔP.

An organic compound (A) with molecular formula C2H5Cl reacts with aqueous
KOH and gives compound (B) and with alcoholic KOH gives compound (C). Identify
(A), (B) and (C).

32. yshÀ ÂøÍøÁ uS¢u GkzxUPõmk u¢x ÂÍUSP.

Explain inductive effect with suitable example.

A

9 6722

33. RÌUPsh ÷\º©[PÐUS Aø©¨¦ Áõ´£õmøh GÊxP.
(i) m-øh ø|m÷µõ ö£ß^ß

(ii) p-øh S÷Íõ÷µõ ö£ß^ß

(iii) 1,3,5 - iøµ ö©zvÀ ö£ß^ß

Write the structural formula for the following compounds.

(i) m-dinitro benzene

(ii) p-dichloro benzene

(iii) 1,3,5 trimethyl benzene

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

Note : Answer all the questions.

34. (A) uÛ© £S¨£õ´ÂÀ J¸ ÷\º©® ¤ßÁ¸® uµÄPøÍ u¸QÓx. Na=14.31%,
S=9.97%, H=6.22%, O=69.5%. ÷\º©zv¾ÒÍ øímµáß •ÊÁx®,
BU]áÝhß ÷\º¢x £iP }µõP C¸UQÓx GÛÀ, ÷\º©zvß ‰»UTÖ
Áõ´£õmøhU PõsP. (÷\º©zvß ‰»UTÖ {øÓ 322)
AÀ»x
(B) (i) ö£Í¼ uºUøPz uzxÁzvøÚU TÖP.
(ii) |ÃÚ BÁºzuÚ Âvø¯U TÖP.
(a) A compound on analysis gave Na=14.31%, S=9.97%, H=6.22%, O=69.5%.
Calculate the molecular formula of the compound, if all the Hydrogen in the
compound is present in combination with Oxygen as Water of Crystallisation.
[molecular mass of the compound is 322]

OR

(b) (i) State Pauli Exclusion Principle.

(ii) State Modern Periodic Law.

A [ v¸¨¦P / Turn over

6722 10

35. (A) (i) I÷\õ÷hõ¨¦PÒ (©õØÔ¯[PÒ) GßÓõÀ GßÚ ? øímµáÛß
I÷\õ÷hõ¨¦PÎß ö£¯ºPøÍ GÊxP.
(ii) PõÀ]¯zvß £¯ßPøÍz u¸P.
AÀ»x
(B) Áõshº ÁõÀì ©õÔ¼PøÍU öPõsk {ø»©õÖ ©õÔ¼PøÍz u¸Â.
(a) (i) What are Isotopes ? Write the names of Isotopes of Hydrogen.
(ii) Give the uses of Calcium.
OR
(b) Derive the values of Critical Constants in terms of Vander Waals constants.

36. (A) öÁ¨£ C¯UP¯¼ß Cµshõ® Âv°ß £À÷ÁÖ TØÖPøÍU TÖP.
AÀ»x
(B) (i) {øÓ uõUP Âvø¯U TÖP.
(ii) öíßÔ Âv°ß Áµ®¦PÒ ¯õøÁ ?
(a) State the various statements of Second law of Thermodynamics.
OR
(b) (i) State law of Mass Action.
(ii) What are the limitations of Henry’s Law ?

37. (A) ‰»UTÖ Bº¤mhõÀ öPõÒøP°ß •UQ¯ A®\[PøÍ ÂÁ›UPÄ®.
AÀ»x
(B) (i) P›© ÷\º©[PÎß ö£õx¨ £s¦PÒ H÷uÝ® ‰ßÔøÚ GÊxP.
(ii) ¤ßÁ¸® ÷\º©[PÎÀ EÒÍ ÂøÚö\¯À öuõSv°øÚU PshÔP.
(A) A]mhõÀiøík
(B) BU\õ¼U Aª»®
(C) øh ö©zvÀ Duº

(D) ö©zvÀ A«ß

A

11 6722

(a) Explain the salient features of Molecular Orbital theory.

OR

(b) (i) Give any three characteristics of Organic compounds.

(ii) Find the functional group of the following compounds.

(A) Acetaldehyde

(B) Oxalic acid

(C) Dimethyl ether

(D) Methylamine

38. (A) ö£ß^ß Aø©¨ø£ £ØÔ ÂÁ›UPÄ®.
AÀ»x
(B) (i) CH3MgI &°À öuõh[Q ¤ßÁ¸ÁÚÁØøÓ GÆÁõÖ u¯õ›¨£õ´ ?

(A) GzvÀ BÀPíõÀ
(B) A]mhõÀiøík
(C) GzvÀ ö©zvÀ Duº
(ii) yº¢x ÷£õuÀ (Eutrophication) GßÓõÀ GßÚ ?
(a) Explain the structure of Benzene.

OR

(b) (i) Starting from CH3MgI, how will you prepare the following ?

(A) Ethylalcohol

(B) Acetaldehyde

(C) Ethyl methyl ether

(ii) What is Eutrophication ?

-o0o-

A [ v¸¨¦P / Turn over