TN 11th Question Paper 2024 Chemistry

TN PUBLIC EXAM

QUESTION
PAPER
2024

No. of Printed Pages : 11
7622
£vÄ Gs
A Register Number

!7622IstYearChemistry!
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 |õßS ©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

7622 2

1. ¤ßÁ¸ÁÚÁØÖÒ Gx ö©mhõ BØÖ¨£kzv ?

(A) −NH2 (B) −NO2 (C) −OCH3 (D) −OH

Among the following, which is meta directing group ?

(a) −NH2 (b) −NO2 (c) −OCH3 (d) −OH

2. J¸ \P¨¤øn¨¤ß ^µõÚ J÷µ ©õv›¯õÚ ¤ÍÂÚõÀ E¸ÁõÁx :

(A) Põº£ß ÷|º A¯Û (B) G»Umµõß PÁº ö£õ¸Ò

(C) uÛ EÖ¨¦ (D) P¸UPÁº ö£õ¸Ò

Homolytic fission of covalent bond leads to the formation of :

(a) carbo cation (b) electrophile

(c) free radical (d) nucleophile

3. J¸ xønUTmiÀ EÒÍ AvP£m\©õÚ G»UmµõßPÎß GsoUøP°øÚ
SÔ¨¤kÁx :

(A) 4l+2 (B) 2n 2 (C) n+l (D) 2l+1

The maximum number of electrons in a sub shell is given by the expression :

(a) 4l+2 (b) 2n 2 (c) n+l (d) 2l+1

4. J¸ «Ò ö\¯À•øÓ°À Ashzvß Gßm÷µõ¤ ©õØÓ® :

(A) < 0 (B) > 0 (C) =0 (D) /0

In a reversible process, the change in entropy of the universe is :

(a) <0 (b) >0 (c) =0 (d) /0

A

3 7622

5. E°º÷Áv BU]áß ÷uøÁ AÍÄ 5 ppm &US SøÓÁõPU öPõskÒÍ }º ©õv›
SÔ¨¤kÁx :
(A) AvPÍÂÀ Pøµ¢u BU]áß EÒÍx
(B) AvPÍÂÀ ©õ_£mkÒÍx
(C) SøÓ¢u COD
(D) SøÓ¢u AÍÄ Pøµ¢u BU]áß EÒÍx
Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be :
(a) rich in dissolved oxygen
(b) highly polluted
(c) low COD
(d) poor in dissolved oxygen

6. 0.018 Qµõ® Gøh²ÒÍ }ºzxΰÀ EÒÍ }º ‰»UTÖPÎß GsoUøP :

(A) 6.022×10 20 (B) 6.022×10 26
(C) 9.9×1022 (D) 6.022×10 23
The number of water molecules in a drop of water weighing 0.018 g is __________.
(a) 6.022×10 20 (b) 6.022×10 26
(c) 9.9×10 22 (d) 6.022×10 23

7. CO2 &ß {ø»©õÖ öÁ¨£{ø» :

(A) 31.18C (B) 30.18C (C) 21.18C (D) 35.58C
The critical temperature of CO2 is :
(a) 31.18C (b) 30.18C (c) 21.18C (d) 35.58C

8. C2F2Cl4 &ß ö£¯º :

(A) L¨›¯õß & 111 (B) L¨›¯õß & 113
(C) L¨›¯õß & 112 (D) L¨›¯õß & 11
The name of C2F2Cl4 is :
(a) Freon - 111 (b) Freon - 113
(c) Freon - 112 (d) Freon - 11

A [ v¸¨¦P / Turn over

7622 4

9. J¸ P›©a ÷\º©zvÀ EÒÍ ø|mµáøÚ PshÔ¯ »õ]Pß ÷\õuøÚ {PÌzu¨&
£kQÓx. CÆÂøÚ°À }» {Ó® E¸ÁõÁuØPõÚ Põµn® :

(A) Fe4[Fe(CN)6]2 (B) Fe3[Fe(CN)6]2

(C) Fe3[Fe(CN)6]3 (D) Fe4[Fe(CN)6]3

Nitrogen detection in an organic compound is carried out by Lassaigne’s test. The blue
colour formed in this reaction is due to the formation of :

(a) Fe4[Fe(CN)6]2 (b) Fe3[Fe(CN)6]2

(c) Fe3[Fe(CN)6]3 (d) Fe4[Fe(CN)6]3

10. ¤ßÁ¸® C¸TÖ vµÁ P»øÁPÎÀ Gx, öµÍÀm Âv°¼¸¢x ÷|ºSÔ
»UPzøuU PõmkQÓx ?

(A) HCl+}º

(B) A]m÷hõß+S÷Íõ÷µõL£õº®

(C) GzuÚõÀ+}º

(D) }º+ø|m›U Aª»®

Which one of the following binary liquid mixtures exhibits positive deviation from Raoults
law ?

(a) HCl+Water

(b) Acetone+Chloroform

(c) Ethanol+Water

(d) Water+Nitric acid

A

5 7622

11. 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 \›¯õÚx BÚõÀ Põµn® uÁÓõÚx.
(B) TØÖ ©ØÖ® Põµn® BQ¯ Cµsk® \›¯õÚx, ÷©¾® Põµn©õÚx
TØÔØPõÚ \›¯õÚ ÂÍUP® BS®.
(C) TØÖ ©ØÖ® Põµn® BQ¯ Cµsk® uÁÓõÚx.
(D) TØÖ ©ØÖ® Põµn® BQ¯ Cµsk® \›¯õÚx BÚõÀ Põµn©õÚx
TØÔØPõÚ \›¯õÚ ÂÍUP©À».
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) Assertion is true and the Reason is false.
(b) Both Assertion and Reason are true and Reason is the correct explanation for the
Assertion.
(c) Both Assertion and the Reason are false.
(d) Both Assertion and Reason are true but the Reason is not the correct explanation for
the Assertion.

12. G®•øÓ°À, E¸Q¯ ÷\õi¯® øímµõUø\k ªßÚõØ £SUP¨£mk, ÷\õi¯®
¤›zöukUP¨£kQÓx ?
(A) öhÍß •øÓ (B) PõìmÚº •øÓ
(C) BìmÁõÀk •øÓ (D) \¯øÚk •øÓ
In which process, fused sodium hydroxide is electrolysed for extraction of sodium ?
(a) Down process (b) Castner’s process
(c) Ostwald’s process (d) Cyanide process

13. 2SO2(g) + O2(g) ⇌ 2SO3(g) GßÓ ÂøÚ°ß ∆ng ©v¨¦ :

(A) 2 (B) 1 (C) −2 (D) −1
The ∆ng value for the reaction

2SO2(g) + O2(g) ⇌ 2SO3(g)
(a) 2 (b) 1 (c) −2 (d) −1

A [ v¸¨¦P / Turn over

7622 6

14. IF5 ‰»UTÔß ÁiÁ® __________.

(A) \xµ ¤µªk (B) •U÷Põn C¸¤µªk
(C) Gs•Q (D) uÍ \xµ®
The shape of IF5 molecule is __________.

(a) Square pyramidal (b) Trigonal bipyramidal

(c) Octahedral (d) Square planar

15. }º Áõ² Gߣx :
(A) CO+H2 (B) H2O(g) (C) CO+N2 (D) CO+H2O
Water gas is :

(a) CO+H2 (b) H2O(g) (c) CO+N2 (d) CO+H2O

£S-v & II / PART - II
SÔ¨¦ : GøÁ÷¯Ý® BÖ ÂÚõUPÐUS Âøh- ¯ - Î U- P - Ä ®. ÂÚõ Gs 24 &US
Pm-hõ-¯-©õP Âøh-¯-ÎU-P-Ä®. 6x2=12

Note : Answer any six questions. Question No. 24 is compulsory.

16. G»Umµõß PÁº ußø©ø¯ Áøµ¯ÖUPÄ®.
Define electronegativity.

17. \©õÚ {øÓ – Áøµ¯ÖUPÄ®.
Define equivalent mass.

18. PõÀ]¯® Põº£÷Úmiß «x öÁ¨£zvß ÂøÍÂØPõÚ \©ß£kzu¨£mh
\©ß£õmøh GÊxP.
Write the balanced equation for the action of heat on Calcium Carbonate.

A

7 7622

19. hõÀhÛß £Sv AÊzu Âvø¯U TÖP.
State Dalton’s Law of Partial Pressure.

20. ¤ßÁ¸® ÷\º©[PÎÀ EÒÍ CÚUP»¨ø£ GÊxP.
(A) BF3 (B) CH4 (C) PCl5 (D) SF6
Write the hybridisation present in the following compounds.
(a) BF3 (b) CH4 (c) PCl5 (d) SF6

21. £_ø©U SiÀ ÂøÍÄ GßÓõÀ GßÚ ?
What is Greenhouse effect ?

22. ö£ß^øÚ GÆÁõÖ BHC BP ©õØÖÁõ´ ?
How will you convert Benzene to BHC ?

23. £iÁ›ø\a ÷\º©[PÒ GßÓõÀ GßÚ ?
What is Homologous series ?

24. 2 Q.Q. }›À 90 Qµõ® SÐU÷Põì Pøµ¢xÒÍ Pøµ\¼ß ÷©õ»õ¼miø¯
PnUQkP.
Calculate the molality of the solution containing 90 g of glucose dissolved in 2 kg of water.

£S-v & III / PART - III

SÔ¨¦ : GøÁ÷¯Ý® BÖ ÂÚõUPÐUS Âøh- ¯ - Î U- P - Ä ®. ÂÚõ Gs 33 &US
Pm-hõ-¯-©õP Âøh-¯-ÎU-P-Ä®. 6x3=18
Note : Answer any six questions. Question No. 33 is compulsory.

25. Bº¤mhõÀ – Áøµ¯ÖUPÄ®. 3px ©ØÖ® 4dx2−y2 Bº¤mhõ¼À EÒÍ G»UmµõÝUS
n ©ØÖ® l ©v¨¦PøÍU TÖP.
Define orbital. What are the n and l values for 3px and 4dx2−y2 electron ?

A [ v¸¨¦P / Turn over

7622 8

26. øímµáÛß £¯ßPøÍz u¸P.
Give the uses of hydrogen.

27. A¯Û¯õUS® BØÓ¼ß BÁºzuÚ £s¤øÚ ÂÁ›UPÄ®.
Describe the periodic trend of ionisation potential.

28. H 2 (g)+I 2 (g) ⇌ 2HI(g) GßÓ \©{ø» ÂøÚUS K p ©ØÖ® K c ©v¨¦PøÍ
Á¸ÂUPÄ®.
Derive Kp and Kc value for the equilibrium reaction H2(g)+I2(g) ⇌ 2HI(g).

29. ø£ (π) ¤øn¨¦ GßÓõÀ GßÚ ?
What is a pi (π) bond ?

30. öíìêß öÁ¨£® ©õÓõ TmhÀ Âvø¯ Áøµ¯ÖUPÄ®.
Define Hess’s Law of constant heat summation.

31. P¸UPÁº ö£õ¸Ò ©ØÖ® G»Umµõß PÁº ö£õ¸Ò – ÷ÁÖ£kzxP.
Differentiate Nucleophile and Electrophile.

32. SN2 ÂøÚ ÁÈ•øÓø¯ ÂÍUSP.

Explain SN2 reaction mechanism.

33. CH 2=CH 2+ Br2 
BÀPíõÀ. KOH
2
→ A → B  →C
NaNH

A, B ©ØÖ® C &ø¯ PshÔP.

Find A, B and C.

alc. KOH
2 NaNH
CH2=CH2+ Br2 
→ A 
→ B  →C

A

9 7622

£S-v & IV / PART - IV

SÔ¨¦ : AøÚzx ÂÚõUPÐUS® Âøh-¯-ÎU-P-Ä®. 5x5=25

Note : Answer all the questions.

34. (A) (i) ÂÛP›À Põn¨£k® J¸ P›©a ÷\º©® 40% Põº£ß, 6.6% øímµáß
©ØÖ® 53.4% BU]áøÚU öPõskÒÍx. Aa÷\º©zvß Gί ÂQu
Áõ´¨£õmiøÚU PshÔP.

(ii) uØ_ÇØ]U SÁõsh® Gs SÔzx ]Ö SÔ¨¦ GÊxP.

AÀ»x

(B) ö£›¼¯® ©ØÖ® A¾ªÛ¯zvØPõÚ Jzuz ußø©PøÍ ÂÁ›UPÄ®.
(a) (i) An organic compound present in vinegar has 40% carbon, 6.6% hydrogen and
53.4% oxygen. Find the empirical formula of the compound.

(ii) Write short note on spin quantum number.

OR

(b) Discuss the similarities between Beryllium and Aluminium.

35. (A) (i) Cøhaö\¸PÀ øímøµkPÒ GßÓõÀ GßÚ ? GkzxUPõmkz u¸P.

(ii) »õ¢uøÚkPÒ ©ØÖ® BUiøÚkPÎß ö£õxÁõÚ G»Umµõß
Aø©¨¤øÚz u¸P.

AÀ»x

(B) APBØÓ¼ß ]Ó¨¤¯À¦PøÍ ÂÍUSP.
(a) (i) What are Interstitial hydrides ? Give an example.

(ii) Give the general electronic configuration of Lanthanides and Actinides.

OR

(b) List the characteristics of internal energy.

A [ v¸¨¦P / Turn over

7622 10

36. (A) (i) öµÍÀm Âvø¯U TÖP.
(ii) Áõs hº ÁõÀì \©ß£õmiÀ EÒÍ PÚ AÍÂØPõÚ v¸zuzøu
ÂÍUSP.
AÀ»x
(B) Áõsm íõL¨ \©ß£õmiøÚ Á¸ÂUPÄ®.
(a) (i) State Raoult’s Law.
(ii) Explain the correction term for Volume in the Van der Waals equation.
OR
(b) Deduce the Vant Hoff equation.

37. (A) N 2 ‰»UTÖ E¸Áõuø» ‰»UTÖ Bº¤mhõÀ (MO) öPõÒøP ‰»®
£hzxhß ÂÁõvUPÄ®.
AÀ»x
(B) (i) ¤ßÁ¸® ÷\º©[PÎß IUPAC ö£¯ºPøÍz u¸P.

(A)

(B)

(C)

(ii) β &}UP ÂøÚø¯ GÊxP.
(a) Discuss the formation of N2 molecule using MO theory with diagram.
OR
(b) (i) Give the IUPAC name for the following compounds.

(A)

(B)

(C)
(ii) Write β-elimination reaction.

A

11 7622

38. (A) (i) RÌUPshÁØÖÒ C¸¢x ö£ß^øÚ GÆÁõÖ u¯õ›¨£õ´ ?
(A) A]mi½ß
(B) ¥ÚõÀ
(ii) DDT &ß £¯ßPÒ ¯õøÁ ?

AÀ»x
(B) Aª» ©øÇ GÆÁõÖ E¸ÁõQÓx ? Auß ÂøÍÄPøÍ ÂÍUSP.
(a) (i) How will you prepare Benzene from the following ?
(A) Acetylene
(B) Phenol
(ii) What are the uses of DDT ?
OR
(b) How is acid rain formed ? Explain its effects.

-oOo-

A [ v¸¨¦P / Turn over

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