TN 10th Question Paper 2023 Science

Tamil Nadu
State Board

2023
QUESTION
PAPER

No. of Printed Pages : 11
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!6829Science!
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Part - III
AÔ¯À / SCIENCE
( uªÌ ©ØÖ® B[Q» ÁÈ / Tamil & English Version)

Põ» AÍÄ : 3.00 ©o ÷|µ® ] [ ö©õzu ©v¨ö£sPÒ : 75
Time Allowed : 3.00 Hours ] [ Maximum Marks : 75

AÔÄøµPÒ : (1) AøÚzx ÂÚõUPЮ \›¯õP Aa_¨ £vÁõQ EÒÍuõ GߣuøÚ
\›£õºzxU öPõÒÍÄ®. Aa_¨£vÂÀ SøÓ°¸¨¤ß AøÓU
PsPõo¨£õÍ›h® EhÚi¯õP öu›ÂUPÄ®.
(2) }»® AÀ»x P¸¨¦ ø©°øÚ 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¨¦ : CÆÂÚõzuõÒ |õßS £SvPøÍU öPõshx.
Note : This question paper contains four parts.

£Sv & I / PART - I

SÔ¨¦ : (i) AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 12x1=12

(ii) öPõkUP¨£mkÒÍ |õßS ÂøhPÎÀ ªPÄ® Hئøh¯ Âøh°øÚ
÷uº¢öukzx 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

6829 2

1. S ö»ß]ß E¸¨ö£¸UP©õÚx G¨÷£õx® __________ ©v¨¦øh¯x.

(A) ÷|ºUSÔ

(B) GvºUSÔ

(C) ÷|ºUSÔ AÀ»x GvºUSÔ

(D) _È
Magnification of a convex lens is always :

(a) Positive

(b) Negative

(c) Either positive (or) negative

(d) Zero

2. RÌUPsh G¢u ÂøÚ°À ÷\´ EmP¸Âß {øÓ GsoÀ |õßS SøÓ²® ?

(A) α ]øuÄ (B) β ]øuÄ

(C) γ ]øuÄ (D) {³mµõß ]øuÄ
In which of the following reaction, the mass number decreases by four of the
daughter nucleus ?

(a) α decay (b) β decay

(c) γ decay (d) neutron decay

3. }›ß Qµõ® ‰»UTÖ {øÓ __________.

(A) 2 Q (B) 16 Q (C) 18 Q (D) 8 Q
The gram molecular mass of water is :

(a) 2g (b) 16 g (c) 18 g (d) 8g

3 6829

4. RÌUPshÁØÖÒ Gx \ºÁUPøµ¨£õß ?

(A) A]m÷hõß (B) ö£ß^ß

(C) }º (D) BÀPíõÀ

Which of the following is the universal solvent ?

(a) Acetone (b) Benzene

(c) Water (d) Alcohol

5. IUPAC ö£¯›ku¼ß£i BÀiøíkUPõP ÷\ºUP¨£k® Cµshõ® {ø»
¤ßöÚõmk __________.

(A) BÀ (B) B°U Aª»®

(C) HÀ (D) Kß

The secondary suffix used in IUPAC nomenclature of an aldehyde is __________.

(a) -ol (b) -oic acid

(c) -al (d) -one

6. C¸ÁõÌÂPÎß Cu¯® __________ AøÓPÒ öPõshx.

(A) 3 (B) 4 (C) 2 (D) 5

The heart of amphibians possess __________ chambers.

(a) 3 (b) 4 (c) 2 (d) 5

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6829 4

7. Qµ¨ _ÇØ] __________ CÀ |øhö£ÖQÓx.

(A) £_[PoP®

(B) ø©m÷hõPõsm›¯õÂß EmTÌ©®

(C) ¦Óz÷uõÀ xøÍ

(D) ø©m÷hõPõsm›¯õÂß Em¦Óa \ÆÄ
Kreb’s cycle takes place in __________.

(a) chloroplast

(b) mitochondrial matrix

(c) stomata

(d) inner mitochondrial membrane

8. C¸ •øÚ {³µõßPÒ Põn¨£k® Ch® __________.

(A) Ps ÂÈzvøµ (B) ö£¸‰øͨ ¦Óo

(C) Áͺ P¸ (D) _Áõ\ G¤w¼¯®
Bipolar neurons are found in :

(a) retina of eye (b) cerebral cortex

(c) embryo (d) respiratory epithelium

9. ]ß÷Pª°ß ÂøÍÁõÀ E¸ÁõÁx __________.

(A) `ì÷£õºPÒ (B) öPõÛi¯õ

(C) ø\÷Põm (D) QÍõª÷hõì÷£õºPÒ
Syngamy results in the formation of __________.

(a) zoospores (b) conidia

(c) zygote (d) chlamydospores

5 6829

10. ö£õ¸zxP :
(1) \õºU÷Põ©õ (i) AvP¨£i¯õÚ £]
(2) Põº]÷Úõ©õ (ii) AvP¨£i¯õÚ uõP®
(3) £õ¼i¨]¯õ (iii) Cøn¨¦zv_ ¦ØÖ÷|õ´
(4) £õ¼÷£â¯õ (iv) Á°ØÖ ¦ØÖ÷|õ´
(A) (1)-(iii), (2)-(iv), (3)-(ii), (4)-(i)
(B) (1)-(iv), (2)-(iii), (3)-(i), (4)-(ii)
(C) (1)-(i), (2)-(iii), (3)-(iv), (4)-(ii)
(D) (1)-(iv), (2)-(i), (3)-(ii), (4)-(iii)
Match the following :

(1) Sarcoma (i) Excessive hunger

(2) Carcinoma (ii) Excessive thirst

(3) Polydipsia (iii) Connective tissue cancer

(4) Polyphagia (iv) Stomach cancer

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

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

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

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

11. G¢u {PÌa]°ß Põµn©õP 9 : 3 : 3 : 1 E¸ÁõQÓx ?
(A) ¤›uÀ (B) SÖU÷P P»zuÀ
(C) \õº¤ßÔ Jx[SuÀ (D) Jk[S ußø©
9 : 3 : 3 : 1 ratio is due to :

(a) Segregation (b) Crossing over

(c) Independent assortment (d) Recessiveness

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6829 6

12. Ámhõµ CÚ uõÁµÂ¯À GßÝ® ö\õÀø» •uß •u¼À AÔ•P¨£kzv¯Áº :

(A) öPõµõÚõ (B) J.W. íõºìö£ºPº

(C) öµõÚõÀk µõì (D) î²÷Põ i ›ì

The term Ethnobotany was coined by :

(a) Khorana (b) J.W. Harshberger

(c) Ronald Ross (d) Hugo de Vries

£Sv & II / PART - II

SÔ¨¦ : GøÁ÷¯Ý® HÊ ÂÚõUPÐUS Âøh¯ÎUPÄ®. ÂÚõ Gs 22 &US
Pmhõ¯©õP Âøh¯ÎUPÄ®. 7x2=14

Note : Answer any seven questions. Question No. 22 is Compulsory.

13. {ø»©® – Áøµ¯ÖUPÄ®. Auß ÁøPPÒ ¯õøÁ ?

Define inertia. Give its classification.

14. ÁõÚ® Hß }» {Ó©õPz ÷uõßÖQÓx ?

Why does the sky appear blue in colour ?

15. J¸ P÷»õ› – Áøµ¯ÖUPÄ®.

Define one Calorie.

16. AÁPõm÷µõ Âv°ß £¯ß£õkPÎÀ H÷uÝ® CµsiøÚU TÖP.

Mention any two applications of Avogadro’s Law.

7 6829

17. Amøh°À Põn¨£k® Jmkso uPÁø©¨¦PøÍ GÊxP.

List out the parasitic adaptations in leech.

18. ‰øÍø¯¨ £õxPõ¨£õP øÁzv¸UP EuÄ® EÖ¨¦PÒ ¯õøÁ ?

What are the structures involved in the protection of brain ?

19. öPõkUP¨£mkÒÍ £hzvÀ A, B, C ©ØÖ® D BQ¯ £õP[PøÍ Aøh¯õÍ®
PõnÄ®.

Identify the parts A, B, C and D in the given figure.

20. ©µ¦¨ ö£õÔ°¯À – Áøµ¯ÖUPÄ®.

Define genetic engineering.

21. ì¤øµmk (SPRITE) GßÓõÀ GßÚ ?

What is Sprite ?

22. 2 Q.Q {øÓÁÊÄøh¯ J¸ Pv›¯UP¨ ö£õ¸ÍõÚx AqUP¸ CønÂß÷£õx
öÁΰk® ö©õzu BØÓø»U PnUQkP.

Calculate the amount of energy released when a radioactive substance undergoes

fusion and results in a mass defect of 2 kg.

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6829 8

£Sv & III / PART - III

SÔ¨¦ : GøÁ÷¯Ý® HÊ ÂÚõUPÐUS Âøh¯ÎUPÄ®. ÂÚõ Gs 32 &US
Pmhõ¯©õP Âøh¯ÎUPÄ®. 7x4=28

Note : Answer any seven questions. Question No. 32 is Compulsory.

23. Âø\°ß \©ß£õmøh {³mhÛß Cµshõ® Âv ‰»® u¸Â.

Deduce the equation of force using Newton’s Second Law of Motion.

24. Qmh¨£õºøÁ ©ØÖ® yµ¨£õºøÁ SøÓ£õkPøÍ ÷ÁÖ£kzxP.

Differentiate the eye defects : Myopia and Hypermetropia.

25. (A) «ö¯õ¼ AvºÄÖuÀ GßÓõÀ GßÚ ?

(B) J¼ Gvöµõ¼zuÀ GßÓõÀ GßÚ ?

(a) What do you understand by the term Ultrasonic Vibration ?

(b) What is meant by reflection of sound ?

26. (A) Cµ\UP»øÁ GßÓõÀ GßÚ ? GkzxUPõmk u¸P.

(B) uõªµzvß H÷uÝ® Cµsk £¯ß£õkPøÍ TÖP.

(a) What is an amalgam ? Give an example.

(b) Mention any two uses of copper.

27. ÷\õ¨¤ß y´ø©¯õUPÀ •øÓø¯ ÂÍUSP.

Explain the mechanism of cleansing action of soap.

9 6829

28. (A) ©»¸® uõÁµ[PÎÀ Põn¨£k® ‰ßÖ ÁøP¯õÚ v_z öuõS¨¦PøÍ
SÔ¨¤kP.

(B) JÎa÷\ºUøPø¯ £õvUS® PõµoPÒ ¯õøÁ ?
(a) Name the three basic tissue systems in a flowering plant.

(b) What are the factors affecting photosynthesis ?

29. Cµzuzvß £oPøͨ £mi¯¼kP.
Enumerate the functions of blood.

30. ©øÇ}º ÷\ª¨¦ Aø©¨¦PÒ GÆÁõÖ {»zui }º ©mhzøu AvP›UPa
ö\´QßÓÚ ?
How do rainwater harvesting structures recharge ground water ?

31. (A) ¥÷Úõøh¨, ã÷Úõøh¨ £ØÔ }º AÔÁx GßÚ ?

(B) AÀ÷»õ÷\õ®PÒ GßÓõÀ GßÚ ?
(a) What do you understand by the term phenotype and genotype ?

(b) What are allosomes ?

32. (A) 0.01 M HNO3 Pøµ\¼ß pH ©v¨¦ PõsP.

(B) 100 Q. }›À 25 Q. \ºUPøµø¯U Pøµzx J¸ Pøµ\À u¯õ›UP¨£kQÓx.
Auß Pøµö£õ¸Îß {øÓ \uÃuzøuU PõsP.
(a) Calculate the pH of 0.01 M solution of HNO3.

(b) A solution is prepared by dissolving 25 g sugar in 100 g of water. Calculate

the mass percentage of solute.

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6829 10

£Sv & IV / PART - IV
SÔ¨¦ : AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. ÷uøÁ¯õÚ Ch[PÎÀ £h®
Áøµ¯Ä®. 3x7=21
Note : Answer all the questions. Draw diagrams wherever necessary.
33. (A) (i) áüÀ öÁ¨£ Âv – Áøµ¯ÖUPÄ®.
(ii) {UPÀ ©ØÖ® S÷µõª¯® P»¢u E÷»õPUP»øÁ ªß\õµ öÁ¨£÷©ØÖ®
\õuÚ©õP £¯ß£kzu¨£kÁx Hß ?
(iii) J¸ ªß E¸S CøÇ GÆÁõÖ ªß \õuÚ[PøÍ £õxPõUQÓx ?
AÀ»x
(B) (i) ö|mhø» GßÓõÀ GßÚ ?
(ii) AqUP¸ Eø» GßÓõÀ GßÚ ? Auß CßÔ¯ø©¯õu £õP[PÎß
ö\¯À£õkPøÍ ÂÁ›UPÄ®.
(a) (i) State Joule’s Law of Heating.
(ii) An alloy of nickel and chromium is used as the heating element.
Why ?
(iii) How does a fuse wire protect electrical appliances ?
OR
(b) (i) What is a longitudinal wave ?
(ii) What is a nuclear reactor ? Explain its essential parts with their
functions.

34. (A) (i) AqUPmk Gs – Áøµ¯ÖUPÄ®.
(ii) H2SO4 &À EÒÍ \À£›ß \uÃu Cø¯¤øÚU PõsP.
(iii) Dµ® EÔg_® ÷\º©[PÐUS®, Dµ® EÔg]U Pøµ²® ÷\º©[PÐUS®
Cøh÷¯¯õÚ ÷ÁÖ£õkPÒ ¯õøÁ ?
AÀ»x
(B) (i) «Ò ©ØÖ® «Íõ ÂøÚPøÍ ÷ÁÖ£kzxP.
(ii) |k{ø»¯õUPÀ ÂøÚ GßÓõÀ GßÚ ? GkzxUPõmk u¸P.
(iii) £iÁ›ø\ ÷\º©[PÎß H÷uÝ® ‰ßÖ £s¦PøÍU TÖP.
(a) (i) Define : Atomicity.
(ii) Calculate the percentage of sulphur in H2SO4.
(iii) In what way hygroscopic substances differ from deliquescent substances.
OR
(b) (i) Differentiate reversible and irreversible reaction.

(ii) What is neutralization reaction ? Give an example.
(iii) Give any three characteristics of homologous series.

11 6829

35. (A) (i) uUPõΰÀ P¸ÄÓõU PÛø¯z ysk® íõº÷©õß Gx ?
(ii) øuµõ´k íõº÷©õß Hß BÐø© íõº÷©õß GßÖ AøÇUP¨&
£kQßÓx ?
(iii) »õ©õºUQß £›nõ©U ÷Põm£õkPøÍ ÂÍUSP.
AÀ»x
(B) (i) G¢u ö|õv i.Gß.H. &øÁ SÔ¨¤mh Ch[PÎÀ öÁmh¨ £¯ß£kQÓx ?
(ii) ø»]ß Aª÷Úõ Aª»® ö\Ô¢u Cµsk ©UPõa÷\õÍ P»¨¦°›
ÁøPPÎß ö£¯øµ GÊxP.
(iii) ¦øP ¤izu¼ß B£zxPÒ ©ØÖ® ¦øP°ø»°ß w¯ ÂøÍÄPÒ £ØÔ
ÂÍUSP.
(a) (i) Which hormone induces parthenocarpy in tomatoes ?

(ii) Why is thyroid hormone referred as ‘personality hormone’ ?

(iii) Explain Lamarck’s theories of evolution.

OR

(b) (i) Which enzyme cuts DNA at specific sites ?

(ii) Name two maize hybrids rich in amino-acid, lysine.

(iii) Explain smoking hazards and the harmful effects of tobacco.

-oOo-

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