TN 10th Question Paper 2026 Science

FOR TN 10TH EXAM PREPARATION

TN 10th 2026
Question Paper ·
Science
EXAM YEAR TYPE SUBJECT

TN 10th 2026 Question Paper Science

Notes · Sample Papers · Previous Year Papers · Mock Tests

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Part - III
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Time Allowed : 3.00 Hours ] [ Maximum Marks : 75

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Instructions : (1)
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Check the question paper for fairness of printing.

inform the Hall Supervisor immediately.
If there is any lack of fairness,

(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.

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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

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9219 2

1. {øÓ ©v¨¦ ©õÓõ©À ¦Â¯õÚx uÚx BµzvÀ 50% _¸[QÚõÀ ¦Â°À
ö£õ¸mPÎß Gøh¯õÚx :
(A) 50% SøÓ²® (B) 50% AvP›US®
(C) 25% SøÓ²® (D) 300% AvP›US®
If the earth shrinks to 50% of its real radius its mass remaining the same, the weight of a

body on the Earth will :

(a) decrease by 50% (b) increase by 50%

(c) decrease by 25% (d) increase by 300%

2. S ö»ß]ß E¸¨ö£¸UP©õÚx G¨÷£õx® __________ ©v¨¦øh¯x.
(A) ÷|ºUSÔ (B) GvºUSÔ
(C) ÷|ºUSÔ (A) GvºUSÔ (D) _È
Magnification of a convex lens is :

(a) Positive (b) Negative

(c) Either positive or negative (d) Zero

3. J¸ Gί ªß_ØÔÀ \õÂø¯ ‰i¯Ähß ªßÂÍUS JκÁx Hß ?
(A) \õ ªß\õµzøu u¯õ›UQÓx
(B) \õ ‰i°¸US® ÷£õx ªß_ØÔß _ØÖ¨ £õøuø¯ ‰i ÂkQÓx.
(C) \õ ‰i°¸US® ÷£õx ªß_ØÔß _ØÖ¨ £õøu vÓUQÓx.
(D) ªßÂÍUS ªß÷ÚØÓ©øh²®
In a simple circuit, why does the bulb glow when you close the switch ?

(a) The switch produces electricity

(b) Closing the switch completes the circuit

(c) Closing the switch breaks the circuit

(d) The bulb is getting charged

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(A) 8, 6

(B)
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(C) 4, 8

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(D) öPõkUP¨£mh uµÄPμ¸¢x Põn C¯»õx
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In the nuclear reaction
6
X
12
→
α decay
Z
Y
A
, the value of A and Z is :

(a) 8, 6

(b) 8, 4

(c) 4, 8

(d) Cannot be determined with given data

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(C) I÷\õ÷hõ¨¤ß {øÓ (D) {³mµõÛß GsoUøP
The basis of modern periodic law is _____________.

(a) Atomic number (b) Atomic mass

(c) Isotopic mass (d) Number of neutrons

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a (A) 12 Q (B) 11 Q (C) 16 Q (D) 20 Q
Solubility of NaCl in 100 ml water is 36 g. If 25 g of salt is dissolved in 100 ml of water how

much more salt is required for Saturation ?

(a) 12 g (b) 11 g (c) 16 g (d) 20 g

[ v¸¨¦P / Turn over

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9219 4

7. yÍõUP¨£mh CaCO ,
3
Pmi¯õÚ CaCO
3
&I Âh wµ©õP ÂøÚ¦›QÓx. Põµn® :

(A) AvP ¦Ó¨£µ¨£ÍÄ (B) AvP AÊzu®

(C) AvP ö\ÔÂÚõÀ (D) AvP öÁ¨£{ø»

Powdered CaCO reacts more rapidly than flaky CaCO because of __________.
3 3

(a) large surface area (b) high pressure

(c) high concentration (d) high temperature

8. ¤ßÁ¸® £iÁ›ø\ ÷\º©[PÎÀ öuõhºa]¯õP Á¸® Cøn Gx ?

(A) C H
3 8
©ØÖ® C H
4 10
(B) C H
2 2
©ØÖ® C H
2 4

(C) CH
4
©ØÖ® C H
3 6
(D) C H OH
2 5
©ØÖ® C H OH
4 8

Which of the following pairs can be the successive members of a homologous series ?

(a) C H and C H (b) C H and C H
3 8 4 10 2 2 2 4

(c) CH and C H (d) C H OH and C H OH
4 3 6 2 5 4 8

9. EÒ÷|õUQ¯ ø\»® Gߣx Guß ]Ó¨¦¨ £s£õS® ?

(A) ÷Áº (B) usk (C) Cø»PÒ (D) ©»ºPÒ

The endarch condition is the characteristic feature of :

(a) root (b) stem (c) leaves (d) flowers

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10. £ß©¯ {ø»°À JßÖ AÀ»x AuØS ÷©Ø£mh S÷µõ÷©õ÷\õ®PøÍ CÇzuÀ
GÚ AøÇUP¨£kQÓx.
__________

(A) |õß©¯ {ø» (B) Aß³¤Íõ´i
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The loss of one or more Chromosome in a ploidy is called __________.

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Tetraploidy (b) Aneuploidy

(c) Euploidy (d) Polyploidy

AÍÄUS ªg]¯ ©x¨£ÇUPzvÚõÀ E¸ÁõÁx :
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(B) PÀ½µÀ
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(C) ©õ¯z ÷uõØÓ® ag ‰øÍa ö\¯À£õk SøÓuÀ

Excessive consumption of alcohol leads to :

(a) Loss of memory (b) Cirrhosis of liver

(c) State of hallucination (d) Suppression of brain function

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a (A) Inkscape (B) script editor (C) stage (D) sprite

Which is used to edit programs ?

(a) Inkscape (b) script editor (c) stage (d) sprite

[ v¸¨¦P / Turn over

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9219 6

£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. £õ°À Âvø¯U TÖP.

State Boyle’s Law.

14. J¨¦ Aq{øÓ & Áøµ¯ÖUPÄ®.

Define : Relative atomic mass.

15. x¸ Gߣx GßÚ ? x¸ E¸ÁõSÁuß \©ß£õmøh u¸P.

What is rust ? Give the equation for formation of rust.

16. Gί Rm÷hõÛß ö£¯øµ²®, ‰»UTÖ Áõ´£õmøh²® GÊxP.

Name the simplest Ketone and give its structural formula.

17. ©ÛuºPÎß _Ø÷Óõmh©õÚx Cµmøha _Ø÷Óõmh® GÚ AøÇUP¨£kQÓx.
Hß ?

Why is the circulation in man referred to as double circulation ?

18. |õÍ•ÒÍa _µ¨¤US®, |õͪÀ»õa _µ¨¤US® EÒÍ ÷ÁÖ£õkPøÍ GÊxP.

Write the differences between endocrine and exocrine gland.

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 6 of 12

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19. ©õuÂhõ°ß ÷£õx ©õuÂhõ´ _Põuõµ® GÆÁõÖ £µõ©›UP¨£kQÓx ?

How can menstrual hygiene be maintained during menstrual days ?

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BºUQ¯õ¨öh›Uì Cøn¨¦ E°›¯õP Hß P¸u¨£kQÓx ?
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Why is Archaeopteryx considered to be a connecting link ?
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21. ö£õ¸zxP.

(1) E°› Áõ² & BØÓÀ ÷\ª¨¦

(2) C¯ØøP Áõ² & CO
2

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(3) £_ø© CÀ» Áõ² & ¦x¨¤UPzuUP BØÓÀ

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(4) CFL £À¦PÒ &
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Match the following :
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(1) Bio gas - energy saving

(2) Natural gas - CO
2

(3) Green House gas - Renewable energy

(4) CFL Bulbs - Non-renewable energy
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s e 22. AvºöÁsøn Eøh¯ J¼‰»©õÚx,
500 Hz 30
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«Â ÷ÁPzvÀ
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÷PmS|øµ
g la ÷|õUQ |PºQÓx. PõØÔÀ J¼°ß ÷ÁP® «Â a GÛÀ, ÷PmS|µõÀ
−1

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330

Enµ¨£k® J¼°ß AvºöÁs GßÚ ?

A source producing a sound of frequency 500 Hz is moving towards a listener with a velocity

−1 −1
of 30 ms . The speed of the sound is 330 ms in air. What will be the frequency heard by

the listener ?

[ v¸¨¦P / Turn over

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9219 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. (A) J롧 H÷uÝ® Cµsk £s¦PøÍU TÖP.
(B) SÂö»ß_ JßÔÀ ©ØÖ® ¦ÒÎPÐUS Cøh÷¯ ö£õ¸Ò øÁUP¨£k®
F 2F

÷£õx E¸ÁõUP¨£k® ¤®£zvØPõÚ Pvº £h® ÁøµP.
(a) List any two properties of light.

(b) Draw a ray diagram to show the image formed by a convex lens when the object is

placed between F and 2F.

24. (A) }Ò öÁ¨£ Â›Ä ©ØÖ® £µ¨¦ öÁ¨£ Â›Ä & ÷ÁÖ£kzxP.
(B) Esø© öÁ¨£ Â›Ä SnP® GßÓõÀ GßÚ ?
(a) Distinguish between Linear and Areal expansion.

(b) What is co-efficient of Real expansion ?

25. Áõ²UPÎÀ J¼°ß vø\÷ÁPzøu¨ £õvUS® PõµoPÒ GøÁ ?
What are the factors that affect the velocity of sound in gases ?

26. (i) ᨣõÛÀ Cµshõ® E»P¨ ÷£õ¸US¨ ¤ÓS ¦vuõP¨ ¤ÓUS® ]»
SÇ¢øuPÐUS¨ ¤ÓÂU SøÓ£õkPÒ Põn¨£kÁx Hß ?
(ii) ÷ÁÍõsø©z xøÓ°À Pv›¯UP I÷\õ÷hõ¨¦PÎß £¯ßPÒ H÷uÝ®
CµsiøÚ GÊxP.
(i) In Japan, after the Second World War some of the new born children are having

congenital diseases. Why ?

(ii) Give any two uses of radio isotopes in the field of agriculture.

27. (A) ‰»UTÔÀ EÒÍ ©ØÖ® &US Cøh°À EÒÍ ¤øn¨¦ Gx ?
HF H F

(B) C¨¤øn¨ø£ AÔ¯ EuÄ® BÁºzuÚ £s¦ Gx ?
(C) C¨£s¦ öuõh›¾®, öuõSv°¾® GÆÁõÖ ÷ÁÖ£kQÓx ?
(a) Identify the bond between H and F in HF molecule.

(b) What property forms the basis of identification ?

(c) How does the property vary in Periods and in Groups ?

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 8 of 12

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28. GzuÚõ°U Aª»® GzuÚõ¼À C¸¢x GÆÁõÖ u¯õ›UP¨£kQÓx ?
AÆÂøÚUPõÚ \©ß£õmøh GÊxP.

How is ethanoic acid prepared from ethanol ? Give the chemical equation.

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(ii)
g la Põn¨£k® Jmkso uPÁø©¨¦PøÍ GÊxP. (H÷uÝ®
Amøh°À a
a
Cµsk)

(i) Why are the rings of cartilages found in trachea of Rabbit ?

(ii) List out any two parasitic adaptations in Leech.

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30. {³µõßPÒ, AÁØÔß Aø©¨¤ß Ai¨£øh°À GÆÁõÖ ÁøP¨£kzu¨
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£mkÒÍx ?
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Classify Neurons based on its structure.

a

31. PõkPÎß •UQ¯zxÁ® £ØÔ TÖP.

Enumerate the importance of Forest.

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70 ª.¼ vµÁ® {µ¨£¨£mkÒÍx. vµÁ® 50

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s e Ah[Q¯ öPõÒP»øÚ öÁ¨£¨£kzx® ÷£õx vµÁzvß {ø» öPõÒP»ÛÀ
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g la 50ª.¼ &¼¸¢x ª.¼ BP SøÓQÓx. ÷©¾® öÁ¨£¨£kzx® ÷£õx
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a öPõÒP»ÛÀ vµÁzvß {ø» ª.¼ BP E¯¸QÓx GÛÀ, vµÁzvß Esø©
öÁ¨£ Â›Ä ©ØÖ® ÷uõØÓ öÁ¨£ ›øÁU PnUQkP.
51.2

A container whose capacity is 70 ml is filled with a liquid up to 50 ml. Then, the liquid in the

container is heated. Initially, the level of the liquid falls from 50 ml to 48.5 ml. Then we heat

more, the level of the liquid rises to 51.2 ml. Calculate the apparent and real expansion.

[ v¸¨¦P / Turn over

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9219 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) {ø»©zvß £À÷ÁÖ ÁøPPøÍ GkzxUPõmkPÐhß ÂÍUSP.
(ii) Q›UöPm ÂøͯõmiÀ ÷©¼¸¢x ÂÊ® £¢vøÚ ¤iUS® ÷£õx,
Âøͯõmk õº, u® øP°øÚ ¤ß÷ÚõUQ Cʨ£x Hß ?
AÀ»x
(B) (i) 1Ω, ©ØÖ®
2Ω BQ¯ ªßuøhPøÍU öPõsh ‰ßÖ
4Ω

ªßuøh¯õUQPÒ J¸ ªß_ØÔÀ Cøn¯õP CønUP¨£mkÒÍx. 1Ω

ªßuøh öPõsh ªßuøh¯õUQ ÁȯõP ªß÷Úõmh® ö\ßÓõÀ 1A

©ØÓ C¸ ªßuøh¯õUQPÒ ÁȯõP ö\À¾® ªß÷Úõmhzvß
©v¨¤øÚU PõsP.
(ii) K® Âv – Áøµ¯Ö.
(a) (i) What are the types of inertia ? Give an example for each type.

(ii) While catching a cricket ball, the fielder lowers his hands backwards. Why ?

OR

(b) (i) Three resistors of 1Ω , 2Ω and 4Ω are connected in parallel in a circuit. If a 1Ω
resistor draws a current of 1A, find the current through the other two resistors.

(ii) State Ohm’s Law.

34. (A) (i) C¸©iU Pøµ\À GßÓõÀ GßÚ ?
(ii) RÌPshÁØÖUS u»õ J¸ GkzxUPõmk u¸P.
(1) vµÁzvÀ Áõ² vµÁzvÀ vs©® (2)

(3) vs©zvÀ vs©® Áõ²ÂÀ Áõ² (4)

(iii) }ºUPøµ\À ©ØÖ® }µØÓ Pøµ\À GßÓõÀ GßÚ ? GkzxUPõmk u¸P.
AÀ»x
(B) (i) Cµmøh Ch¨ö£¯ºa] ÂøÚ°ß ÁøPPøÍ uS¢u GkzxUPõmkhß
ÂÍUSP.
(ii) 1.0×10 ÷©õ»õº ö\ÔÄÒÍ
−4
Pøµ\¼ß ©v¨ø£ PnUQkP.
HNO
3
pH

(a) (i) What is meant by binary solution ?

(ii) Give an example each for.

(1) Gas in liquid (2) Solid in liquid

(3) Solid in solid (4) Gas in gas

(iii) What is aqueous and non-aqueous solution ? Give an example.

OR

(b) (i) Explain the types of double displacement reactions with examples.

−4
(ii) Calculate the pH of 1.0×10 molar solution of HNO
3

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 10 of 12

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35. (A) (i) ©»¸® uõÁµ[PÎÀ Põn¨£k® ‰ßÖ ÁøP¯õÚ v_z öuõS¨¦PøÍ
SÔ¨¤kP.
(ii) JÎa÷\ºUøP GßÓõÀ GßÚ ? Cx ö\À¼À G[S |øhö£ÖQÓx ?
(iii) _Áõ\ DÄ GßÓõÀ GßÚ ?
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ö©shÀ uß B´ÂØS Hß ÷uõmh¨ £mhõoa ö\iø¯z
s e m
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(i)

s l a
ag
÷uº¢öukzuõº ?
g a xskPÒ GßÓõÀ GßÚ ?
lJP\õQ
a J¸ i.Gß.H Cµsk
(ii)

(iii) CøÇPÍõÀ BÚx. __________

(a) (i) Name the three basic tissues system in flowering plants.

(ii) What is Photosynthesis and where in a cell does it occur ?

(iii) What is Respiratory Quotient ?

OR

(b) (i) Why did Mendel select pea plant for his experiments ?
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(ii) What are Okazaki fragments ?

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DNA consists of two __________ chains.

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[ v¸¨¦P / Turn over

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