TN 8th Question Paper 2022 Science

TN ESLC Question Paper 2022 Science
No. of Printed Pages : 11
6205
!6205Science! £vÄ Gs
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AÔ¯À / SCIENCE
( uªÌ ©ØÖ® B[Q» ÁÈ / Tamil & English Version)

Põ» AÍÄ : 2.00 ©o ÷|µ® ] [ ö©õzu ©v¨ö£sPÒ : 100
Time Allowed : 2.00 Hours ] [ Maximum Marks : 100

AÔÄøµPÒ : (1) AøÚzx ÂÚõUPЮ \›¯õP¨ £vÁõQ EÒÍuõ GߣuøÚa
\›£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.

£Sv & I/PART - I

¤›Ä & 1 / SECTION - 1

öPõkUP¨£mkÒÍ ©õØÖ ÂøhPÎÀ ªPÄ® Hئøh¯ Âøhø¯z ÷uº¢öukzxU
SÔ±mkhß Âøh°øÚ²® ÷\ºzx GÊuÄ®. 15x1=15

Choose the most appropriate answer from the given four alternatives and write the option
code and the corresponding answer.

1. AÊzuzvß A»S :
(A) £õìPÀ (B) ÷µi¯ß (C) £õ´ì (D) {³mhß
The Unit of Pressure is :

(a) Pascal (b) Radian (c) Poise (d) Newton

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2. vµÁ {ø»°¼¸¢x vh {ø»US ©õÖ® {PÌÂØS __________ GßÖ ö£¯º.
(A) £u[P©õuÀ (B) SκÂzuÀ (C) EøÓuÀ (D) £iuÀ
The process of converting a liquid into a solid is called __________.
(a) Sublimation (b) Condensation (c) Freezing (d) Deposition

3. ©Ûu PõxUSU ÷PmPU Ti¯ AvºöÁs Áµ®¦ :
(A) 2 Hz •uÀ 2,000 Hz Áøµ (B) 20 Hz •uÀ 2,000 Hz Áøµ
(C) 20 Hz •uÀ 20,000 Hz Áøµ (D) 200 Hz •uÀ 20,000 Hz Áøµ
The range of audible frequency for the human ear is :
(a) 2 Hz to 2,000 Hz (b) 20 Hz to 2,000 Hz
(c) 20 Hz to 20,000 Hz (d) 200 Hz to 20,000 Hz

4. MRI Gߣuß Â›ÁõUP® :

(A) Magnetic Resonance Imaging (B) Magnetic Running Image
(C) Magnetic Radio Imaging (D) Magnetic Radar Imaging
MRI stands for __________.
(a) Magnetic Resonance Imaging (b) Magnetic Running Image
(c) Magnetic Radio Imaging (d) Magnetic Radar Imaging

5. ]Á¨¦U ÷PõÒ GßÖ AøÇUP¨£kÁx :
(A) ¦uß (B) öÁÒÎ (C) §ª (D) ö\ÆÁõ´
__________ is called as Red Planet.
(a) Mercury (b) Venus (c) Earth (d) Mars

6. öÁ¨£{ø»©õÛPÎÀ £¯ß£kzu¨£k® vµÁ E÷»õP® :
(A) uõªµ® (B) £õuµ\® (C) öÁÒÎ (D) u[P®
The liquid metal used in thermometers is :
(a) Copper (b) Mercury (c) Silver (d) Gold

3 6205

7. ¤ßÁ¸ÁÚÁØÖÒ A÷\õm GÚ¨£kÁx Gx ?
(A) BUêáß (B) ø|mµáß
(C) \À£º (D) Põº£ß øh BUø\k
Which of the following is known as azote ?

(a) Oxygen (b) Nitrogen

(c) Sulphur (d) Carbon dioxide

8. }›À, øímµáß ©ØÖ® BU]áß BQ¯øÁ __________ {øÓ ÂQuzvÀ
Cøn¢xÒÍÚ.
(A) 1 : 8 (B) 8 : 1 (C) 2 : 3 (D) 1 : 3
In water, hydrogen and oxygen are combined in the ratio of __________ by mass.

(a) 1:8 (b) 8:1 (c) 2:3 (d) 1:3

9. __________ öÁ¨£{ø»°À }º £ÛUPmi¯õP ©õØÓ©øh²®.

(A) 08C (B) 1008C (C) 1028C (D) 988C
Water changes to ice at :

(a) 08C (b) 1008C (c) 1028C (d) 988C

10. ÷\õi¯® øímµõUø\k J¸ __________ BS®.
(A) Aª»® (B) Põµ® (C) BUø\k (D) µ\U P»øÁ
Sodium hydroxide is a __________.

(a) Acid (b) Base (c) Oxide (d) Amalgam

11. E°› ö\ÀPÒ __________ CÀ AÍÂh¨£kQßÓÚ.
(A) ö\.«. (B) ª.«. (C) ø©Uµõß (D) «mhº
The cells of animals are measured in __________.

(a) cm (b) mm (c) micron (d) meter

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12. Pµ¨£õß §a] Auß __________ Eu²hß |PºQÓx.
(A) PõÀ (B) G¾®¦ (C) uø\UPõÀ (D) •Ê EhÀ
Cockroach moves with the help of its :

(a) Leg (b) Bone (c) Muscular foot (d) Whole body

13. __________ ‰mkPÒ Aø\¯õuøÁ.

(A) ÷uõÒ£møh ©ØÖ® øP (B) •Ç[PõÀ ©ØÖ® PqUPõÀ
(C) ÷©À uõøh ©ØÖ® ©søh Kk (D) RÌ uõøh ©ØÖ® ÷©À uõøh
__________ joints are immovable.

(a) Shoulder and arm (b) Knee and ankle

(c) Upper jaw and skull (d) Lower jaw and upper jaw

14. ©soÀ ÂøuPøÍ Ck® ö\¯À•øÓ°ß ö£¯º __________.
(A) EÊuÀ (B) ÂøuzuÀ
(C) £°º¨ ö£¸UP® (D) £°ºa _ÇØ]
The process of placing seeds in the soil is called as :

(a) Ploughing (b) Sowing

(c) Crop production (d) Crop rotation

15. Põk AȨ¦ Gߣx __________.
(A) PõkPøÍ AÈzuÀ (B) uõÁµ[PøÍ Áͺ¨£x
(C) uõÁµ[PøÍU PÁÛ¨£x (D) CøÁ GxĪÀø»
Deforestation means __________.

(a) Clearing of forest (b) To grow plants

(c) To look after plants (d) None of these

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¤›Ä - 2 / SECTION - 2

÷Põimh Ch[PøÍ {µ¨¦P. 10x1=10
Fill in the blanks.

16. vs©U ÷Põn® __________ GßÓ A»QÀ AÍUP¨£kQÓx.
The solid angle is measured in __________.

17. AÇS {ø»¯[PÎÀ A»[Põµ® ö\´¯¨ £¯ß£k® ÷PõÍP Bi __________.
The spherical mirror used in a beauty parlour for make-up is __________.

18. J¼ __________ BÀ E¸ÁõUP¨£kQÓx.
Sound is produced by __________.

19. PÚ©õÚ C¸®¦¨ ö£õ¸ÒPøÍ E¯ºzu¨ £¯ß£kÁx __________.
__________ are used to lift heavy iron pieces.

20. E»º £Û __________ BP¨ £¯ß£kQÓx.
Dry ice is used as a __________.

21. SÍ塧 öPõkUQÀ __________ Aª»® EÒÍx.
Wasp sting contains __________ acid.

22. __________ §gø\°¼¸¢x u¯õ›UP¨£kÁx ö£Û]¼ß GßÓøÇUP¨&
£kQÓx.
Penicillin is obtained from the fungi __________.

23. "ÁøP¨£õmi¯À' GßÓ ö\õÀ __________ ö©õÈ°¼¸¢x ö£Ó¨£mhx.
The word ‘Taxonomy’ is derived from __________ language.

24. __________ Cß •møh ªP¨ö£›¯ ö\À BS®.
The largest cell is egg of an __________.

25. WWF Gߣx __________ IU SÔUQÓx.
WWF stands for __________.

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¤›Ä - 3 / SECTION - 3

ö£õ¸zxP : 10x1=10
Match the following :

26. {Ó¨¤›øP (a) vs©® Áõ²ÁõuÀ
Dispersion of light Solid to gas

27. £u[P©õuÀ (b) ÁΩsh» AÊzu®
Sublimation Atmospheric pressure

28. £õuµ\©õÛ (c) ÁõÚÂÀ
Barometer Rainbow

29. ªß E¸Q (d) uk¨§]
Fuse Vaccine

30. \¢vµ¯õß (e) }»¨ £aø\¨ £õ]
Chandrayaan Blue green algae

31. Dìm (f) \¢vµß
Yeast Moon

32. ø|mµáß (g) ªß_ØÖ AvP `hõPõ©À £õxPõUS®
Nitrogen Prevent a circuit from over heating

33. GmÁºm öáßÚº (h) Aª÷Úõ Aª»®
Edward Jenner Amino acid

34. ø\¯÷ÚõLø£] (i) Eµ®
Cyanophyceae Fertilizer

35. ¦µu® (j) E°› ÂøÚ³UQ
Protein Biocatalyst

7 6205

¤›Ä - 4 / SECTION - 4

K›¸ ÁõºzøuPÎÀ Âøh¯ÎUPÄ®. 5x1=5
Answer the following questions in one or two words.

36. JÎaö\ÔÂß SI A»S GßÚ ? Auß SÔ±k ¯õx ?
What is the SI unit of luminous intensity ? How is it denoted ?

37. E÷»õP¨ ÷£õ¼PÐUS J¸ GkzxUPõmk u¸P.
Give one example for metalloids.

38. ¤ßÁ¸® uÛ©[PÎß SÔ±kPøÍ GÊxP.
(A) u[P® (B) C¸®¦
Write the symbols for the following elements.
(a) Gold (b) Iron

39. ÂÛPº u¯õ›UP¨ £¯ß£k® £õUj›¯õÂß ö£¯øµ GÊxP.
Name the bacteria used in the production of Vinegar.

40. AÈ¢x÷£õÚ E°›Ú[PÐUS C¸ GkzxUPõmkPÒ u¸P.
Give two examples for extinct species.

£Sv - II / PART - II
H÷uÝ® £zx ÂÚõUPÐUS Âøh¯ÎUPÄ®. 10x2=20
Answer any ten of the following questions.

41. B®¤¯º – Áøµ¯ÖUPÄ®.
Define - Ampere.

42. JÎ GvöµõΨ¦ ÂvPøÍU TÖP.
State the Laws of Reflection.

6205 8

43. ªß •»õ® §_u¾US |õßS GkzxUPõmkPÒ u¸P.
Give any four uses of electroplating.

44. «ö¯õ¼ GßÓõÀ GßÚ ?
What is an Ultrasonic Sound ?

45. ö\¯ØøPU Põ¢u® GßÓõÀ GßÚ ? GkzxUPõmkPÒ u¸P.
What is artificial magnet ? Give Examples.

46. ¤ßÁ¸® SÔ±kPÍõÀ SÔUP¨ö£Ö® uÛ©[PÎß ö£¯ºPøÍ GÊxP.
(A) Na (B) W (C) Ba (D) U
Name the elements with the following symbols.

(a) Na (b) W (c) Ba (d) U

47. ø|mµáÛß £¯ßPøͨ £mi¯¼kP.
List out the uses of nitrogen.

48. ÷Áva \©ß£õk GßÓõÀ GßÚ ?
What is a chemical equation ?

49. }º J¸ \ºÁ Pøµ¨£õß – Põµn® TÖP.
Water is an Universal Solvent - Give reason.

50. uß öÁ¨£ HئzvÓß – Áøµ¯ÖUPÄ®.
Define - Specific heat capacity.

9 6205

51. \›¯õ AÀ»x uÁÓõ GÚU TÖP. uÁÖ GÛÀ TØøÓz v¸zv GÊxP.
"ö£¸®£õ»õÚ Aª»[PÒ }›À PøµÁvÀø»'.
State whether the following statement is true or false. If false correct the statement.
‘Most of the acids are not soluble in water’.

52. Põµ[PÎß H÷uÝ® |õßS ÷Áv¨£s¦PøÍ GÊxP.
Write any four chemical properties of base.

53. CNG GߣuøÚ Â›Ä£kzv AuøÚ¨ £ØÔ SÔ¨¦ GÊxP.

Expand - CNG and give a note on it.

54. Âøuzu¼ß ÁøPPøͨ £mi¯¼kP.
Name the methods of Sowing.

55. ¤.¤.Bº (PBR) GßÓõÀ GßÚ ?
What is PBR ?

£Sv - III / PART - III
¤›Ä - 1 / SECTION - 1

¤ßÁ¸ÁÚÁØÔØS £h® Áøµ¢x, £õP[PøÍU SÔUPÄ®. 2x5=10

Answer the following diagram questions.

56. A«£õÂß £h® Áøµ¢x £õP[PøÍU SÔUPÄ®.
Draw and label the parts of Amoeba.

57. »[S ö\À¼ß £h® Áøµ¢x £õP[PøÍU SÔUPÄ®.
Draw and label the parts of Animal Cell.

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¤›Ä - 2 / SECTION - 2

RÌUPõq® ÂÚõUPÐUS Âøh¯ÎUPÄ®. 6x5=30

Answer the following questions.

58. (A) Ai¨£øh AÍÄPøÍ AÁØÔß A»SPÐhß £mi¯¼kP.
AÀ»x

(B) öÁ¨£U SkøÁ ÷Áø» ö\´²® ÂuzvøÚ ÂÍUSP.
(a) List out the base quantities with their units.

OR

(b) Explain the working of thermos flask.

59. (A) ªßÚÀ GÆÁõÖ ÷uõßÖQÓx ?
AÀ»x

(B) J¼ ©õ_£õmiß ÂøÍÄPøÍU SøÓUP GßÚ |hÁiUøP GkUP
÷Ásk® ?
(a) How lightning takes place ?

OR

(b) What steps should be taken to reduce the effect of noise pollution ?

60. (A) £À÷ÁÖ {ø»PÎÀ }º ©õ_£kuø» ÂÍUSP.
AÀ»x

(B) {»UP›°ß £À÷ÁÖ ÁøPPøͨ £ØÔ ÂÍUSP.
(a) Explain the different ways by which water gets polluted.

OR

(b) Explain the different types of coal.

11 6205

61. (A) EnĨ ö£õ¸ÒPÒ GÆÁõÖ ÷Áv ÂøÚPÍõÀ £õvUP¨£kQßÓÚ Gߣøu
ÂÍUSP.
AÀ»x

(B) Põµ[PÎß £¯ßPÒ ¯õøÁ ?
(a) Explain how food items are spoiled by chemical reaction.
OR
(b) What are the uses of bases ?

62. (A) ¦÷µõ£¯õmiUì £ØÔ ÂÍUSP.
AÀ»x

(B) ©¸zxÁz uõÁµ[PÎß ö£¯ºPøÍ GÊv AÁØÔß £¯ßPøÍ ÂÁ›UPÄ®.
(a) Explain about probiotics.
OR
(b) Write the names of medicinal plants and explain their uses.

63. (A) \ÆÅk £µÁø» Euõµnzxhß ÂÍUSP.
AÀ»x

(B) }º¨£õ\Ú •øÓPøͨ £ØÔ ÂÍUSP.
(a) Explain Osmosis with an example.
OR
(b) Give a detailed account on irrigation.

-oOo-