TN 10th Model Question Paper Science

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Part - III
AÔ¯À / SCIENCE
( uªÌ ©ØÖ® B[Q» ÁÈ / Tamil & English Version)

÷|µ® : 2½ ©o ] [ ö©õzu ©v¨ö£sPÒ : 75
Time Allowed : 2½ Hours ] [Maximum Marks : 75

AÔÄøµ : (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 ©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¨¦ : CÆÂÚõzuõÒ ‰ßÖ ¤›ÄPøÍU öPõshx.
Note : This question paper contains three sections.

¤›Ä & I / SECTION - I
(©v¨ö£sPÒ : 15) / (Marks : 15)

SÔ¨¦ : (i) C¨¤›ÂÀ EÒÍ 15 ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 15x1=15
(ii) Aøh¨¦U SÔ°ÝÒ öPõkUP¨£mkÒÍ ©õØÖ ÂøhPÎÀ
ªPÄ® \›¯õÚ Âøhø¯z ÷uº¢öukzx GÊuÄ®.
Note : (i) Answer all the 15 questions.
(ii) Choose the correct answer from the alternatives given in the brackets.

[ v¸¨¦P / Turn over

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1. {¯õshºuÀ ©Ûuß £ØÔ¯ \›¯õÚ TØÖ __________ .
(©ÛuøÚ Jzu •uÀ ÷íõªÛmkPÒ, ÷ÁÍõsø© öuõhUP®, CøÓa]PøÍ
EsquÀ ©ØÖ® {ªº¢u |øh²®, CÓ¢uÁºPøͨ ¦øuzuÀ)
The correct statement about Neanderthal man is :
(the first human like hominid, started agriculture, ate meat and walked erectly, buried
the dead)

2. øÁµ\õÀ EshõS® ÷|õ´ __________ .
(øhL£õ´k, öuõÊ÷|õ´, öÁÔ|õ´UPi, £hºuõ©øµ)
__________ is a viral disease.
(Typhoid, Leprosy, Rabies, Ringworm)

3. PÊzx¨ £Sv°À Põn¨£k® J¸ |õͪÀ»õa _µ¨¤ __________ .
(AmŸÚÀ _µ¨¤, ¤m³mh›a _µ¨¤, øuµõ´k _µ¨¤, Pøn¯®)
An endocrine gland found in the neck is __________.
(adrenal gland, pituitary gland, thyroid gland, pancreas)

4. §US® uõÁµ[PÎÀ £õ¼Ú¨ ö£¸UP •øÓ°À |øhö£Ö® •uÀ {PÌÄ
__________ .
(P¸ÄÖuÀ, •øÍzuÀ, «sk® E¸ÁõuÀ, ©Pµ¢ua ÷\ºUøP)
In sexual reproduction of flowering plants, the first event involved is __________.
(fertilization, germination, regeneration, pollination)

5. Enº«ø\ E÷µõ©[PÒ Põn¨£k® »[S __________ .
(öÁÍÁõÀ, ¯õøÚ, ©õß, §øÚ)
Sensitive whiskers are found in __________.
(Bat, Elephant, Deer, Cat)

6. ö|¨µj¯õUPÒ GߣøÁ __________ &ß PÈÄ }UP EÖ¨£õS®.
(¦÷µõm÷hõ÷\õÁõ, ^»sm÷µmhõ, umøh¨ ¦ÊUPÒ, ÁøÍzuø\¨ ¦ÊUPÒ)
Nephridia are the excretory organ of __________.
(Protozoans, Coelenterates, Flatworms, Annelids)

7. }›ÚõÀ £µÄ® ÷|õ´US GkzxUPõmk __________ .
(ö\õÔ ]µ[S, QÛ¯õ ¦Ê÷|õ´, £õºøÁ SøÓ£õk, Põ»µõ)
An example of water-borne disease is __________.
(scabies, dracunculiasis, trachoma, cholera)

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8. }øµU Pøµ¨£õÚõPU öPõsh Pøµ\À }ºUPøµ\À BS®. Põº£ß &øh&
\Àø£øhU Pøµ¨£õÚõPU öPõsh Pøµ\À __________ BS®.
(}ºUPøµ\À / }µØÓ Pøµ\À)
A solution that contains water as the solvent is called an aqueous solution. If
carbon-di-sulphide is a solvent in a given solution, then the solution is called __________.
(aqueous solution, non-aqueous solution)

9. G¾ªaø\°À ]m›U Aª»® EÒÍx. B¨¤ÎÀ EÒÍ Aª»® __________
(»õUiU Aª»®, ©õ¼U Aª»®, hõºhõ›U Aª»®, BUéõ¼U Aª»®)
Citric acid is present in lemon. Apple contains __________.
(Lactic acid, Malic acid, Tartaric acid, oxalic acid)

10. öuõSv 16 &À EÒÍ uÛ©[PÒ __________ GÚ¨£k®.
(Põº£ß Sk®£®, \õÀ÷Põöáßì Sk®£®, ÷í÷»õáß Sk®£®, ø|mµáß
Sk®£®)
Group 16 elements are called __________.
(Carbon family, Chalcogen family, Halogen family, Nitrogen family)

11. AÀøPß Sk®£zvÀ EÒÍ •uÀ ÷\º©zvß IUPAC ö£¯º __________ .
(Dzwß / Dzøuß)
IUPAC name of the first member of alkyne is _________.
(ethene/ethyne)

12. v¸S AÍ __________ &ß Âmhzøu AÍUP¨ £¯ß£kQÓx.
(Ph¨£õøµ, ö©À¼¯P®¤, Q›UöPm £¢x)
The Screw Gauge is used to measure the diameter of a _________.
(Crowbar, Thin wire, Cricket ball)

13. ¦Â°ß {øÓ ©õÓõ©À uØ÷£õøu¯ ©v¨¤¼¸¢x ¦Â°ß Bµ® £õv¯õP
SøÓ²©õÚõÀ ¦ÂDº¨¦ •kUPzvß ©v¨¦ __________ .
(uØ÷£õøu¯ {ø»ø¯Âh Cµmi¨£õS®, uØ÷£õøu¯ {ø»ø¯Âh |õßS
©h[PõS®, ©õÓõx, uØ÷£õøu¯ {ø»ø¯Âh £õv¯õPU SøÓ²®)
If the radius of the earth is reduced to half of its present value, with no change in the
mass, the acceleration due to gravity will be :
(doubled to that of its original value, four times that of its original value, remains same,
reduced to half of its original value)

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14. 30 £À¦PÒ öuõhº Cøn¨¤À CønUP¨£mkÒÍx. AvÀ J¸ £À¤ß ªß
E¸S CøÇ E¸Q¯ ¤ß «u•ÒÍ 29 ªß £À¦PЮ A÷u ªß ‰»zxhß
öuõh›øn¨¤À CønUP¨£mhõÀ A¢u AøÓ°À öÁÎa\® __________ .
(AvP›US®, SøÓ²®, ©õÓõ©À C¸US®)
30 bulbs are connected in series. If one bulb is fused and the remaining 29 bulbs are
joined in series and connected to the same supply, the light in the room will be :
(increased, decreased, remained same)

15. E÷»õPU Phzv°À £õ²® ªß÷Úõmh® AuøÚa _ØÔ __________ &I
E¸ÁõUS®.
(Põ¢u¨¦»®, G¢vµÂø\, ysk® ªß÷Úõmh®)
An electric current passing through a metallic conductor produces __________ around
it.
(magnetic field, mechanical force, induced current)

¤›Ä - II / SECTION & II
(©v¨ö£sPÒ : 40) / (Marks : 40)
SÔ¨¦ : GøÁ÷¯Ý® C¸£x ÂÚõUPÐUS Âøh¯ÎUPÄ®. 20x2=40
Note : Answer any twenty questions.

16. |õ´PÎß SøµUS® £s¦ Aø©v¯õÚ £s¤ØS K[S ußø©²øh¯x.
¦ßÚm Pmhzøu¨ £¯ß£kzv (Rr) ã÷Úõøh¨ öPõsh C¸ SøµUS®
|õ´PÒ ‰»® ¤ÓUP Áõ´¨¦ÒÍ |õ´USmiPÎß £s¦PøÍU TÖP.
In dogs the barking trait is dominant over the silent trait. Using Punnet Square, work
out the possible puppies born to two barking parents with genotype (Rr).

17. C¯ØøPz ÷uºÄU öPõÒøPø¯ öÁΰmhÁº ¯õº ? Auß Cµsk
÷Põm£õkPøÍU SÔ¨¤kP.
Who proposed the theory of Natural Selection ? Mention the two principles of this
theory.

18. ©õ÷ÚõS÷ÍõÚÀ Gvº¨¦¨ ö£õ¸ÒPÒ GßÓõÀ GßÚ ? AÁØÔß £¯ß
¯õx ?
What are monoclonal antibodies ? Mention its use.

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19. EÖv¨£kzxuÀ (A) : h¯õ£miì ö©¼mhì ÷|õ¯õÎPÎß CµzuzvÀ
Põn¨£k® TkuÀ \ºUPøµ £¯ß£kzu¨£hõ©À
]Ö}º ÁȯõP öÁÎ÷¯ØÓ¨£k®.
Põµn® (R) : Pøn¯® ÷£õx©õÚ Cß_¼øÚa _µ¨£vÀø».
(A) (A) ©ØÖ® (R) \›¯õÚøÁ. (R) Gߣx (A) & ÄUPõÚ \›¯õÚ ÂÍUP®.
(B) (A) ©ØÖ® (R) \›¯õÚøÁ. (R) Gߣx (A) & ÄUPõÚ \›¯õÚ ÂÍUP® AÀ».
(C) (A) \› BÚõÀ (R) uÁÖ.
(D) (A) uÁÖ BÚõÀ (R) \›.
Assertion (A) : Expulsion of excess unused glucose in the blood through urine
is observed in a diabetic mellitus person.
Reason (R) : Insulin is not produced in sufficient quantity by pancreas.
(a) Both (A) and (R) are true and (R) explains (A).
(b) Both (A) and (R) are true but (R) doesn’t explain (A).
(c) Only (A) is true but (R) is false.
(d) (A) is false but (R) is true.

20. öPõkUP¨£mkÒÍ {³µõßPÎß £h® Áøµ¢x AÁØøÓ CÚ® PõsP.

(A) (B)

Copy and identify the types of neurons given below :

(a) (b)

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21. öPõkUP¨£mkÒÍ £hzøu Áøµ¢x £õP[PøÍU SÔUPÄ®.
Draw the given diagram and label the parts.

22. £õ¿miPÐUS›¯ uÛ¨ £s¦PÒ CµsiøÚU SÔ¨¤kP.
Mention the two unique characteristics of Mammals.

23. (A) ]Ö}µPzvß Aø©¨¦ ©ØÖ® ö\¯À A»SPÒ ¯õøÁ ?
(B) ]Ö}º öÁÎ÷¯Ö® £õøu°ß Ai¨£øh°À ©ÛuPÈÄ }UP
©sh»zv¾ÒÍ ¤ßÁ¸® EÖ¨¦PøÍ Á›ø\¨£kzxP.
]Ö}º |õÍ®, ]Ö}º ¦Ó ÁÈ, ]Ö}µP®, ]Ö }º¨ø£
(a) What are the structural and functional units of a kidney ?
(b) Arrange the organs of the human excretory system in the correct order, based on
the passage of urine.
ureter, urethra, kidney, urinary bladder

24. (A) £õ¿miPÎÀ Põn¨£k® £À Aø©¨¦ ¯õx ?
(B) ¯õøÚ°ß u¢u® Guß ©õÖ£õk ?
(a) What type of dentition is seen in mammals ?
(b) What are modified as tusks in elephants ?

25. \ºUPøµU Pøµ\À BÀPíõ»õP ©õØÓ©øhQÓx.
(A) ÷©ØPsh ö\¯¼À GzuøP¯ {PÌa] |øhö£ÖQÓx ?
(B) G¢u ~sq°› Dk£kQÓx ?
Sugar is converted into alcohol.
(a) In the above reaction what kind of process takes place ?
(b) Which micro - organism is involved ?

26. }›¼¸¢x öÁÎ÷¯ GkUP¨£mh «ßPÒ }sh ÷|µ® E°¸hß C¸UP
•i¯õx. Hß ?
A fish taken out of water cannot survive for a long time. Why ?

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27. A, B GßÖSÔ±mkz uõÁµz usiß ÁõìS»õº v_UPÎß £h®
öPõkUP¨£mkÒÍx.
Types of vascular tissues in the plant stem are given which are labelled as A and B.

(A) AB &Cß ö£¯ºPÒ
(B) A &°ß ÁȯõP¨ ö£õ¸ÒPÒ GÆÁõÖ Cø»PÐUSU Phzu¨
£kQßÓÚ ?
(a) Name A and B
(b) How do the materials in A move upwards to the leaves ?

28. ¤ßÁ¸® E°º÷Áv¯ _ÇØ]ø¯U PshÔ¢x ¤ßÁ¸® ÂÚõUPÐUS
Âøh¯ÎUPÄ®.

(A) GÆÁøP Fmh¨ö£õ¸Ò £›©õÖQÓx ?
(B) A •uÀ D Áøµ |øhö£Ö® ö\¯ÀPÒ ¯õøÁ ?
Observe the following Bio-geo chemical cycle.

(a) Mention the nutrient in the given cycle.
(b) Write the activities from ‘A’ to ‘D’

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29. BØÓÀ ÷©»õsø© GßÓõÀ GßÚ ?

What is energy management ?

30. RÊÒÍ TØÖPÒ uÁÓõP C¸¨¤ß \›¯õÚ TØÔøÚ GÊxP.

(A) C¢v¯õ "PõØÖPÎß |õk' GßÖ AøÇUP¨£kQÓx.

(B) C¯ØøP Áõ²ÂÀ Põn¨£k® •ußø©¯õÚ ö£õ¸Ò ¦÷µõ÷£ß.

Correct the statements, if they are wrong.

(a) India is called the ‘country of winds’.

(b) Propane is the chief component of natural gas.

31. v¸®£ ö£Ó C¯¾® ©ØÖ® v¸®£¨ ö£Ó C¯»õu ÁÍ[PøÍ •øÓ¯õP
ö£õ¸zxP.

ÁÍ[PÒ A B C

v¸®£ ö£Ö®
P› PõØÖ ö£m÷µõ¼¯®
ÁÍ[PÒ
v¸®£ ö£Ó C¯»õu `›¯ JÎ
øímµáß C¯ØøP Áõ²
ÁÍ[PÒ BØÓÀ

Match the suitable renewable and non-renewable sources.

Sources A B C
Renewable Coal Wind Petroleum
Non-Renewable Hydrogen Natural gas Solar energy

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32. 30 Qµõ® \õuõµn E¨ø£ 70 Q. }›À PøµUS®÷£õx E¸ÁõÚ Pøµ\¼ß
ö\ÔøÁ {øÓ \uÃuzvÀ PnUQkP.
Take 30g of common salt and dissolve it in 70g of water. Find the concentration of
solution in terms of weight percent.

33. Cµõuõ ÁiPmkuÀ ‰»® ¤›UP¨£k® J¸ Pøµ\ø»z u¯õ›UQÓõº.
(A) AUPøµ\À GÆÁøPø¯a \õº¢ux ?
(B) AUPøµ\À JÎø¯z uß ÁÈ÷¯ AÝ©vUS©õ ? AÝ©vUPõuõ ?
(C) AUPøµ\¼ß C¯À¤øÚ GÊxP.
(D) Pøµö£õ¸Ò xPÎß E¸ÁÍÄ ¯õx ?
Radha prepared a solution which could be separated by filtration.
(a) Name the type of solution.
(b) Is the solution transparent or opaque ?
(c) Mention the nature of the solution.
(d) Mention the size of the solute particle.

34. ¤ßÁ¸® AmhÁønø¯ {µ¨¦P.

uÛ©® Aq{øÓ ‰»UTÖ {øÓ AqUPmk Gs

S÷Íõ›ß 35.5 71 -

K÷\õß - 48 3

\À£º 32 - 8

ø|mµáß 14 - 2

Complete the table given below :

Element Atomic mass Molecular mass Atomicity Number
Chlorine 35.5 71 -
Ozone - 48 3
Sulphur 32 - 8
Nitrogen 14 - 2

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35. \© AÍÄ ö\ÔÄ öPõsh A]miU Aª»® ©ØÖ® øím÷µõ S÷Íõ›U
Aª»zøu GkzxU öPõshõÀ, CµsiÀ Gx AvP Û¯•ÒÍ
Aª»® ? Hß ?
If acetic acid and hydrochloric acid of same concentration are taken, which among the
two is a stronger acid and why ?

36. |ßS öu›¢u ]» ö£õ¸ÒPÎß pH ©v¨¦ R÷Ç öPõkUP¨£mkÒÍx.

ö£õ¸Ò pH ©v¨¦

G¾ªaø\a \õÖ 2.2 - 2.4

uUPõÎa \õÖ 4.1

Põ¤ 4.4 - 5.5

Ãmk¨ £¯ß£õmk 12.0

A®÷©õÛ¯õ

AmhÁønø¯ £S¨£õ´Ä ö\´x R÷Ç EÒÍ ÷PÒÂPÐUS
Âøh¯ÎUPÄ®.
(A) G¢öu¢u¨ ö£õ¸mPÒ Aª»zußø© Eøh¯øÁ ?
(B) G¢öu¢u¨ ö£õ¸mPÒ Põµzußø© Eøh¯øÁ ?
The pH values of certain familiar substances are given below :

Substance pH value
Lemon juice 2.2 - 2.4
Tomato juice 4.1
Coffee 4.4 - 5.5
Household ammonia 12.0

Analyse the data in the table and answer the following questions.
(a) Which substances are acidic in nature ?
(b) Which substances are basic in nature ?

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37. ö£õ¸zxP :
uõx Áõ´£õk
(A) £õUø\m & Fe2O3
(B) S¨øµm & Cu 2 O
(C) ÷í©øhm & CuFeS2
(D) Põ¨£º ø£øµmì & Al2O3. 2H2O
Match the following :
Ore Formula
(a) Bauxite - Fe2O3
(b) Cuprite - Cu 2 O
(c) Haematite - CuFeS2
(d) Copper pyrites - Al2O3. 2H2O

38. EÖv¨£kzxuÀ : öÁ¨£zuõÀ Jmi Cønzu¼À (öuºø©m
£ØÓøÁ¨£õÛÀ) A¾ªÛ¯zyÐhß Fe 2 O 3
£¯ß£kQÓx.
Põµn® : A¾ªÛ¯zyÒ J¸ Á¼ø©¯õÚ JkUS®
P µ o . EÖv¨£kzxuø» ÂÍUS® ÁøP°À
Põµn® \›¯õP EÒÍuõ ?
Assertion : In thermite welding, aluminium powder and Fe2O3 are used.
Reason : Aluminium powder is a strong reducing agent. Does the reason
satisfy the assertion ?

39. R÷Ç öPõkUP¨£mkÒÍ ÂÍUP[PÎÀ GzuÚõÀ AÀ»x GzuÚõ°U
Aª»zvØS ö£õ¸zu©õÚÁØøÓU PÁÛzxU TÖP.
(A) Cx {Ó©ØÓ G›_øÁ öPõsh J¸ }º©®.
(B) Cx B´ÁPzvÀ E°› ©õv›Pøͨ £õxPõUP¨ £¯ß£kQÓx.
(C) Cx EnÄ, £Ça\õÖPøͨ £õxPõUP¨ £¯ß£kQÓx.
(D) Cx Sε øÁUS®÷£õx £ÛUPmi ÷£õßÓ £iP[PøÍ
E¸ÁõUSQÓx.
Read each description given below and say whether it fits for ethanol or ethanoic acid.
(a) It is a clear liquid with a burning taste.
(b) It is used to preserve biological specimens in laboratories.
(c) It is used to preserve food and fruit juices.
(d) On cooling, it is frozen to form ice flakes which look like a glacier.

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40. v¸SUSÓkÂß (Spanner) øP¨¤i }Í©õP C¸¨£x Hß ?
Why does a spanner have a long handle ?

41. 20 «. Bµ•® 104 Q.Q. {øÓ²® öPõsh B 612 GßÓøÇUP¨£k® ]Ö÷PõÒ
JßøÓ ÷uÁøu £õºøÁ°kQÓõº GÛÀ, B 612 &À Dº¨¦ •kUPzvß ©v¨¦
GßÚ ?
If an angel visits an asteroid called B 612 which has a radius of 20 m and mass of
104 kg, what will be the acceleration due to gravity in B 612 ?

42. £hzvÀ AC •øÚPÐUS Cøh÷¯ EÒÍ öuõS£¯ß ªßuøh ©v¨ø£U
PõsP.
Find the effective resistance across the end AC.

43. Aøh¨¦U SÔUSÒ öPõkUP¨£mkÒÍ ö\õØPÎÀ E›¯ÚÁØøÓz
÷uº¢öukzx¨ ¤ßÁ¸® AmhÁønø¯ {µ¨¦P.
(xzu|õP®, uõªµ®, Põº£ß, PõŸ¯®, PõŸ¯&øh&BUøék, A¾ªÛ¯®)

÷|º ªßÁõ´ PõŸ¯ Aª» ÷\©UP»ß -

Gvº ªßÁõ´ ö»U»õg] ªßP»ß -

Complete the table choosing the right terms within the brackets.
(Zinc, Copper, Carbon, Lead, Lead Dioxide, Aluminium)

+ve electrode Lead acid accumulator -
−ve electrode Lechlanche -

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44. ö£õ¸zxP :
(A) ªßÞmh® (Q) – I2×R×t

(B) ö\´¯¨£mh ÷Áø» (W) – I×t

(C) öÁ¨£ BØÓÀ (H) – R×I

(D) ªßÚÊzu ÷ÁÖ£õk (V) – V×Q
Match the following :
(a) Charge (Q) – I2×R×t
(b) Work done (W) – I×t
(c) Heat energy (H) – R×I
(d) Potential difference (V) – V×Q

45. ÷Põimh Ch[PøÍ {µ¨¦P.
(A) ÷©õmhõº : {ø»UPõ¢u® ; ÁõoP •øÓ°»õÚ ÷©õmhõº : __________
(B) S¯z öuõø»Ä : «mhº ; vÓß : __________ .
Fill in the blanks.
(a) Motor : a permanent magnet ; then
Commercial motor : __________
(b) Focal length of a lens : metre ;
Power of a lens : __________

46. SÂö»ß]ß •UQ¯U S¯® F 1 &À ö£õ¸Ò EÒÍ÷£õx ¤®£zvß
{ø»UPõÚ PvºÁøµ£h® ÁøµP.
If the object is placed at a principal focus F1 of a convex lens, draw the ray diagram for
the image formation.

47. JίõÚx PõØÔ¼¸¢x JλPÀ Gs 1.47 öPõsh ©sönsön´°À
~øÇQÓx. PõØÔÀ J롧 vø\÷ÁP® 3×108 «/ GÛÀ ©sönsön´°À
J롧 vø\÷ÁP® GßÚ ?
Light enters from air to kerosene having refractive index of 1.47. What is the speed of
light in kerosene, if the speed of light in air is 3×108 m/s ?

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¤›Ä - III / SECTION & III

(©v¨ö£sPÒ : 20) / (Marks : 20)

SÔ¨¦ : (i) JÆöÁõ¸ £Sv°¼¸¢x® J¸ ÂÚõ Ãu® |õßS ÂÚõUPÐUS
Âøh¯ÎUPÄ®. 4x5=20

(ii) ÷uøÁ¯õÚ Ch[PÎÀ £h® ÁøµP.

Note : (i) Answer any four questions by choosing one question from each part.

(ii) Draw diagrams wherever necessary.

£Sv - I / PART & I

48. (A) Põ\÷|õ´ GÆÁøP°À £µÄQÓx ?

(B) Põ\÷|õ°ÚõÀ HØ£k® £õv¨¦PÒ ¯õøÁ ?

(C) Põ\÷|õ°øÚ HØ£kzx® ÷|õ´ Põµo°ß ö£¯º ¯õx ?

(D) Põ\÷|õ°øÚ Pmk¨£kzx® H÷uÝ® ‰ßÖ •øÓPøÍ GÊxP.

(a) How is Tuberculosis transmitted ?

(b) How does Tuberculosis affect our body ?

(c) What is the causative agent of Tuberculosis ?

(d) How can it be prevented ? (any three)

49. ©Ûu ‰øÍ°ß £À÷ÁÖ £õP[PøÍU SÔ¨¤mk, Auß £oPøͲ®
SÔ¨¤kP.

List out the various parts of the human brain and write a note on their functions.

15 7980

£Sv - II / PART & II
50. §US® uõÁµ[PÎÀ |øhö£Ö® £õ¼Ú¨ö£¸UP •øÓ°À Dk£k® Cµsk
{PÌÄPøÍ GÊxP.
(A) •uÀ {PÌÄ ©ØÖ® Auß ÁøPPøÍ ÂÁ›UP.
(B) Auß |ßø© wø©PøÍ GÊxP.
Write the two events involved in the sexual reproduction of a flowering plant.
(a) Discuss the first event and explain its types.
(b) Mention the advantages and disadvantages of that event.

51. ¦øP, ¦øP, G[S ÷|õUQÝ® ¦øP ©sh»®. Ca`ÇÀ EhÀ|»zvØS HØÓx
Gߣøu HØÖU öPõÒQÕºPÍõ ? Põµn[PøÍ GÊxP.
We are surrounded by smoke. Is this situation good for our health ? Give reason.

£Sv - III / PART & III
52. ¤ßÁ¸® AqUPÎß ÷©õÀ GsoUøPø¯U PnUQkP.
(A) 7 Q. ø|mµáß (B) 4.6 Q. ÷\õi¯®
(C) 40 Q. PõÀ]¯® (D) 14 Q. ¼zv¯® (E) 3.2 Q. \À£º
Find how many moles of atoms are there in :
(a) 7 g of Nitrogen (b) 4.6 g of Sodium
(c) 40 g of Calcium (d) 14 g of Lithium (e) 3.2 g of Sulphur

53. P›© ÷\º©[PÒ A ©ØÖ® B BQ¯øÁ C2H6O GßÓ ‰»UTÖ Áõ´£õmøhU
öPõsh ©õØÔ¯ Aø©¨¦PÒ. ©õØÔ¯ Aø©¨¦ A ÷\õi¯® E÷»õPzxhß
øímµáß Áõ²øÁ öÁÎ÷¯ØÖQÓx. BÚõÀ B CÆÂøÚ ¦›ÁvÀø».
A BÚx A]miU Aª»zxhß Ahº H2SO4 Ehß ÂøÚ¦›¢x £Ça\õØÔß
©n•øh¯ C GßÓ ÷\º©zøuz u¸QÓx GÛÀ, ©õØÔ¯ Aø©¨¦PÒ
A, B ©ØÖ® ÷\º©® C &I PshÔP. uS¢u ÷Áv \©ß£õkPøÍ GÊxP.

Organic compounds ‘A’ and ‘B’ are the isomers with the molecular formula C2H6O.
Compound ‘A’ produces hydrogen gas with sodium metal, whereas compound ‘B’
does not. Compound ‘A’ reacts with acetic acid in the presence of concentrated H2SO4
to form compound ‘C’ with fruit flavour. What are the isomers ‘A’, ‘B’ and the
compound ‘C’ ? Write suitable chemical equations.

[ v¸¨¦P / Turn over

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£Sv - IV / PART - IV 12345
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54. E¢u AÈÂßø© Âvø¯U TÔ, ö©´¨¤UPÄ®.
State law of conservation of momentum and prove it.

55. (A) £h®, ö£õ¸Ò ‘O’ ©ØÖ® ö»ß]ÚõÀ E¸ÁõUP¨£mh Auß ¤®£®
‘I’ &I SÔUQÓx. £hzvÀ ö»ß_ ©ØÖ® Ax GÆÁõÖ ¤®£zøu
E¸ÁõUSQÓx GߣøuU Põmk® PvºÁøµ£h® ÁøµP. ö»ß]ß
•UQ¯ S¯® ‘F’ &IU SÔUP. ö»ß]ß ö£¯øµU TÖP.

(B) í¨¦Ò öuõø»÷|õUQ°ß \õuøÚPÒ Cµsk TÖP.

(a) The diagram shows an object ‘O’, and its image ‘I’ formed by a lens. In the
diagram, draw the lens and the rays to show how the image is formed. Mark
focus F, of the lens. Name the lens.

(b) Mention any two achievements of Hubble Telescope.

-o0o-