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This Question Paper consists of 30 questions and 11 printed pages.

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×éçÎýÌ ÂëcÆU ãñ´Ð

Roll No.

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^{Code No.}

·¤æðÇU Ù´. 51/AS/3

SCIENCE AND TECHNOLOGY

(çߙææÙ °ß´ Âýæñlæðç»·¤è)

(212)

Day and Date of Examination

ÂÚUèÿææ ·¤æ çÎÙ ß çÎÙæ´·¤

Signature of Invigilators 1.

çÙÚUèÿæ·¤æð´ ·ð¤ ãSÌæÿæÚU

2.

General Instructions :

1. Candidate must write his/her Roll Number on the first page of the Question Paper.

2. Please check the Question Paper to verify that the total pages and total number of questions contained in the Question Paper are the same as those printed on the top of the first page.

Also check to see that the questions are in sequential order.

3. For the objective type of questions, you have to choose any one of the four alternatives given in the question i.e. (A), (B), (C) or (D) and indicate your correct answer in the Answer-Book given to you.

4. All the questions including objective type questions are to be answered within the allotted time and no separate time limit is fixed for answering objective type questions.

5. Making any identification mark in the Answer-Book or writing Roll Number anywhere other than the specified places will lead to disqualification of the candidate.

6. Write your Question Paper code No.

51/AS/3-A

on the Answer-Book.

7. (a) The Question Paper is in English/Hindi medium only. However, if you wish, you can answer in any one of the languages listed below :

English, Hindi, Urdu, Punjabi, Bengali, Tamil, Malayalam, Kannada, Telugu, Marathi, Oriya, Gujarati, Konkani, Manipuri, Assamese, Nepali, Kashmiri, Sanskrit and Sindhi.

You are required to indicate the language you have chosen to answer in the box provided in the Answer-Book.

(b) If you choose to write the answer in the language other than Hindi and English, the responsibility for any errors/mistakes in understanding the question will be yours only.

Set A

âæ×æ‹Ø ¥ÙéÎðàæ Ñ

1.

ÂÚUèÿææÍèü ÂýàÙÂ˜æ ·ð¤ ¤ÂãÜð ÂëcÆU ÂÚU ¥ÂÙæ ¥Ùé·ý¤×æ´·¤ ¥ßàØU çܹð´Ð

2

. ·ë¤ÂØæ ÂýàÙÂ˜æ ·¤æð Áæò¡¿ Üð´ ç·¤ ÂýàÙÂ˜æ ·ð¤ ·é¤Ü ÂëcÆUæð´ ÌÍæ ÂýàÙæð´ ·¤è ©ÌÙè ãè ⴁUØæ ãñ çÁÌÙè ÂýÍ× ÂëcÆ ·ð ¤âÕâ𠪤ÂÚU ÀUÂè ãñÐ §â ÕæÌ ·¤è Áæò¡¿ Öè ·¤ÚU Üð´ ç·¤ ÂýàÙ ·ý ç×·¤ UM¤Â ×ð´ ãñ´Ð

3.

ßSÌéçÙcÆU ÂýàÙæð´ ×𴠥淤æð ¿æÚU çß·¤ËÂæð´

(A), (B), (C)

ÌÍæ

(D)

×ð´ âð ·¤æð§ü °·¤ ©žæÚ ¿éÙÙæ ãñ ÌÍæ Îè »§ü

©žæÚU-ÂéçSUÌ·¤æ ×ð´ ¥æ âãè ©žæÚ çÜç¹°ÐU

4.

ßSÌéçÙcÆU ÂýàÙæð´ ·ð¤ âæÍ-âæÍ âÖè ÂýàÙæ𴠷𤠩žæÚ çÙÏæüçÚUÌ ¥ßçÏ ·ð ÖèÌÚU ãè ÎðÙð ãñ´Ð ßSÌéçÙcÆU ÂýàÙæð´ ·ð¤ çÜ°¤¥Ü»

âð â×Ø Ùãè´ çÎØæ Áæ°»æÐ

5.

¤ ©žæÚU-ÂéçSUÌ·¤æ ×ð´ Âã¿æÙ-ç¿q ÕÙæÙð ¥Íßæ çÙçÎücÅU SÍæÙæ𴠷𤤠¥çÌçÚU€Ì ·¤ãè´ Öè ¥Ùé·ý¤×æ´·¤ çܹÙð ÂÚU ÂÚUèÿææÍèü

·¤æð ¥Øæð‚Ø ÆUãÚUæØæ ÁæØð»æÐ

6.

¥ÂÙè ©žæÚU-ÂéçSUÌ·¤æ ÂÚU ÂýàÙÂ˜æ ·¤è ·¤æðÇU ⴁØæ 51/AS/3-A çܹð´Ð

7.

(·¤) ÂýàÙÂ˜æ ·ð¤ßÜ çã´Îè

^/

¥´»ýðÁè ×ð´ ãñÐ çȤÚU Öè, ØçÎ ¥æ ¿æãð´ Ìæð Ùè¿ð Îè »§ü ç·¤âè °·¤ Öæáæ ×ð´ ©žæÚ Îð â·¤Ìð ãñ´ Ñ

¥´»ýðÁè, çã´Îè, ©Îêü, ´ÁæÕè, Õ¡»Üæ, Ìç×Ü, ×ÜØæÜ×, ·¤‹ÙǸ, ÌðÜé»é, ×ÚUæÆUè, ©çǸØæ, »éÁÚUæÌè, ·¤æð´·¤‡æè,

×ç‡æÂéÚUè, ¥âç×Øæ, ÙðÂæÜè, ·¤à×èÚUè, â´S·ë¤Ì¤¥æñÚU çâ´ÏèÐ

·ë¤ÂØæ ©žæÚU-ÂéçSÌ·¤æ ×ð´ çΰ »° Õæò€â ×ð´ çܹð´ ç·¤ ¥æ 緤â Öæáæ ×ð´ ©žæÚU çܹ ÚUãð ãñ´Ð ¤

(¹) ØçÎ ¥æ çã´Îè °ß´ ¥´»ýðÁè ·ð¤ ¥çÌçÚU€Ì ç·¤âè ¥‹Ø Öæáæ ×ð´ ©žæÚU çܹÌð ãñ´ Ìæð ÂýàÙ ·¤æð â×ÛæÙð ×ð´ ãæðÙð ßæÜè

˜æéçÅUØæð´

/

»ÜçÌØæð´ ·¤è çÁ×ðUÎæÚè ·ð ßÜ ¥æ·¤è ãæð»èÐ

1. Which of the following is most appropriate reason for flushing bags of fried potato chips with nitrogen gas by the chips manufacturers ?

(A) To keep the chips dry and crisp.

(B) To prevent oxidation of oil present in chips.

(C) To prevent formation of fungus on chips.

(D) To prevent corrosion of chips.

ÌÜð ãé° ¥æÜê 翌⠷ð¤ Õñ» ×ð´ 翌â çÙ×æüÌæ mæÚUæ Ùæ§ÅþUæðÁÙ »ñâ ·¤æð ÂýßæçãÌ ·¤ÚUÙð ·¤æ çِÙçÜç¹Ì ×ð´ âð ·¤æñÙ âæ âÕâð ©ÂØé€Ì ·¤æÚU‡æ ãñ?

(A)

翌⠷¤æð âê¹æ ¥æñÚU ·é¤ÚU·é¤ÚUæ ÚU¹Ùð ·ð¤ çÜ°Ð

(B)

翌â ×ð´ ×æñÁêÎ ÌðÜ ·¤æ ¥æò€âè·¤ÚU‡æ ÚUæð·¤Ùð ·ð¤ çÜ°Ð

(C)

翌â ÂÚU Èê¤È´¤Îè (·¤ß·¤) ÕÙÙð âð ÚUæð·¤Ùð ·ð¤ çÜ°Ð

(D)

翌⠷¤æ â´ÿææÚU‡æ ÚUæð·¤Ùð ·ð¤ çÜ°Ð

2. The oil rises up in a cotton wick of a lighted lamp because of : 1

(A) its viscosity (B) capillarity

(C) polar nature of oil (D) low density of oil

°·¤ ÁÜÌð ãé° Îè·¤ ·¤è M¤§ü ·¤è ÕæÌè ×ð´ ÌðÜ ·ð¤ ª¤ÂÚU ¿É¸Ùð ·¤æ ·¤æÚU‡æ ãñ Ñ

(A)

§â·¤è àØæÙÌæ

(B)

·ð¤çàæ·¤ˆß

(C)

ÌðÜ ·¤è ÏýéßèØ Âý·ë¤çÌ

^(D)

ÌðÜ ·¤æ çِ٠ƒæوß

SCIENCE AND TECHNOLOGY

(çߙææÙ °ß´ Âýæñlæðç»·¤è)

(212)

Time : 2₂¹ Hours ] [ Maximum Marks : 85

â×Ø Ñ

²¹₂

ƒæ‡ÅðU ] [ Âê‡ææZ·¤ Ñ

⁸⁵

Note : (1) All questions are compulsory.

(2) Marks are indicated against each question.

çÙÎðüàæ Ñ

⁽¹⁾

âÖè ÂýàÙ ¥çÙßæØü ãñ´Ð

(2)

ÂýˆØð·¤ ÂýàÙ ·ð¤ ¥´·¤ ©â·ð¤ âæ×Ùð çΰ »Øð ãñ´Ð

1

3. Consider the following chain : 1 Water ® Algae ® Fish ® Pelican bird

If DDT is present in water, which of the following will have maximum concentration of DDT ?

(A) Water (B) Algae (C) Fish (D) Pelican bird

çِÙçÜç¹Ì o´ë¹Üæ ÂÚU çß¿æÚU ·¤èçÁ° Ñ ÁÜ

^®

àæñßæÜ

^®

×ÀUÜè

^®

ÂðçÜ·¤Ù ç¿çǸØæ

ØçÎ ÁÜ ×ð´ ÇUè.ÇUè.ÅUè

^(DDT)

çßl×æÙ ãñ Ìæð çِÙçÜç¹Ì ×ð´ âð ç·¤â×ð´ ÇUè.ÇUè.ÅUè ·¤è âæ´ÎýÌæ ©‘¿žæ× ãæð»è?

(A)

ÁÜ

(B)

àæñßæÜ

(C)

×ÀUÜè

(D)

ÂðçÜ·¤Ù ç¿çǸØæ

4. When there is sudden dust storm, we immediately close our eyes. This reaction is controlled by :

(A) Cerebrum (B) Cerebellum

(C) Medulla oblongata (D) Spinal cord

ÁÕ ·¤Öè ¥¿æÙ·¤ ÏêÜ ÖÚUè ¥æ´Ïè ¥æÌè ãñ ÌÕ ã× ¥ÂÙè ¥æ¡¹æð´ ·¤æð Õ´Î ·¤ÚU ÜðÌð ãñ´Ð Øã ÂýçÌç·ý¤Øæ çÙØ´ç˜æÌ ãæðÌè ãñ Ñ

(A)

Âý×çSÌc·¤ mæÚUæ

^(B)

¥Ùé×çSÌc·¤ mæÚUæ

(C)

×ðÇéUÜæ ¥æòŽÜæ´»ðÅUæ mæÚUæ

^(D)

×ðM¤-ÚU’Áé mæÚUæ

5. Sand in deserts cools faster than sea water during nights because : 1 (A) Sand is solid whereas sea water is liquid

(B) Sand is pure whereas sea water contains salts (C) Specific heat of sand is lower than sea water

(D) Sea water possesses more energy due to its motion as compared to sand

ÚUæç˜æ ·ð¤ ÎæñÚUæÙ â×éÎý ·ð¤ ÂæÙè ·¤è ÌéÜÙæ ×ð´ ÚðUç»SÌæÙ ·¤è ÚðUÌ Ìð$Áè âð Æ´UÇUè ãæðÌè ãñ €Øæð´ç·¤ Ñ

(A)

ÚðUÌ ÆUæðâ ãñ ÁÕç·¤ â×éÎý ·¤æ ÂæÙè Îýß

(B)

ÚðUÌ àæéh ãæðÌè ãñ ÁÕç·¤ â×éÎý ·ð¤ ÂæÙè ×ð´ Ü߇æ ãæðÌð ãñ´

(C)

â×éÎý ·ð¤ ÂæÙè ·¤è ÌéÜÙæ ×ð´ ÚðUÌ ·¤è çßçàæcÅU ª¤c×æ ·¤× ãæðÌè ãñ

(D)

ÚðUÌ ·¤è ÌéÜÙæ ×ð´ â×éÎý ·ð¤ ÂæÙè ·¤è ª¤Áæü ¥çÏ·¤ ãæðÌè ãñ €Øæ´ðç·¤ Øã »çÌàæèÜ ãñÐ

1

1 6. An element reacts with oxygen to form an oxide which dissolves in water to form a

solution that turns blue litmus red. The oxide dissolves in NaOH to form salt and water. The element is :

(A) Sodium (B) Sulphur (C) Magnesium (D) Aluminium

°·¤ Ìˆß ¥æò€âèÁÙ ·ð¤ âæÍ ç·ý¤Øæ ·¤ÚU·ð¤ ¥æò€âæ§ÇU ÕÙæÌæ ãñ Áæð ÂæÙè ×𴠃æéÜ ÁæÌæ ãñÐ ¥æò€âæ§ÇU ·¤æ ÁÜ ×ð´

Øã çßÜØÙ ÙèÜð çÜÅU×â ·¤æð ÜæÜ ·¤ÚU ÎðÌæ ãñÐ Øã ¥æò€âæ§ÇU

^NaOH

×𴠃æéÜ·¤ÚU Ü߇æ ÌÍæ ÂæÙè ÕÙæÌæ ãñÐ Øã Ìˆß ãñ Ñ

(A)

âæðçÇUØ×

^(B)

âËȤÚU

^(C)

×ñ‚ÙèçàæØ×

^(D)

°ËØé×èçÙØ×

7. Which of the following is not the sign of good mental health ? 1 (A) Sensitivity towards needs of others

(B) Very emotional (C) Full of confidence

(D) Abibility to cope with conflict and disagreement

çِÙçÜç¹Ì ×ð´ âð ·¤æñÙ ¥‘ÀðU ×æÙçâ·¤ SßæS‰Ø ·¤æ â´·ð¤Ì Ùãè´ ãñ?

(A)

ÎêâÚUæð´ ·¤è ¥æßàØ·¤Ìæ¥æð´ ·ð¤ ÂýçÌ â´ßðÎÙàæèÜÌæÐ

(B)

¥ˆØçÏ·¤ Öæßé·¤ ãæðÙæÐ

(C)

¥æˆ×çßàßæâ âð ÖÚUÂêÚU ãæðÙæÐ

(D)

çßÚUæðÏ ¥æñÚU ¥âã×çÌ ·¤è çSÍçÌ ãæðÙð ÂÚU ©Ù·¤æ âæ×Ùæ ·¤ÚUÙæÐ

8. What will you observe when drops of methyl orange are added in a test tube containing sour milk ?

(A) Content of the test tube will turn red (B) Content of the test tube will turn orange (C) Content of the test tube will turn yellow (D) Content of the test tube will turn blue

°·¤ ÂÚU¹ÙÜè ×ð´ ÚU¹ð ¹^ð ÎêÏ ×ð´ ×èÍæ§Ü ¥æñÚð´UÁ ·¤è Õ¡êδð ÇUæÜÙð ÂÚU ¥æ €Øæ ÂýðçÿæÌ ·¤Úð´U»ð?

(A)

ÂÚU¹ÙÜè ·¤æ ÂÎæÍü ÜæÜ Ú´U» ·¤æ ãæð Áæ°»æÐ

(B)

ÂÚU¹ÙÜè ·¤æ ÂÎæÍü ×èÍæ§Ü ¥æñÚð´UÁ ÙæÚU´»è Ú´U» ·¤æ ãæð Áæ°»æÐ

(C)

ÂÚU¹ÙÜè ·¤æ ÂÎæÍü ÂèÜð Ú´U» ·¤æ ãæð Áæ°»æÐ

(D)

ÂÚU¹ÙÜè ·¤æ ÂÎæÍü ÙèÜð Ú´U» ·¤æ ãæð Áæ°»æÐ

1

9. A body dropped from certain height falls freely under gravity. Which of the following graphs represents the relationship between velocity and time of the body during its motion ?

ç·¤âè ª¡¤¿æ§ü âð ÀUæðǸÙð ÂÚU °·¤ ßSÌé »éL¤ˆßèØ ÿæð˜æ ×ð´ ×é€Ì M¤Â âð ç»ÚUÌè ãñÐ çِÙçÜç¹Ì ×ð´ âð ·¤æñÙ âæ »ýæȤ

ßSÌé ·ð¤ ßð» ¥æñÚU â×Ø ·¤æð ©â·¤è »çÌ ·ð¤ ÎæñÚUæÙ ÎàææüÌæ ãñ?

(A) (B)

(C) (D)

10. Explain nuclear fission. Give reason for the release of huge amount of energy during nuclear fission.

ÙæçÖ·¤èØ çß¹´ÇUÙ ·¤è ÃØæØæ ·¤èçÁ°Ð ÙæçÖ·¤èØ çß¹´ÇUÙ ·ð¤ ÎæñÚUæÙ ÕǸð ÂçÚU×æ‡æ ×ð´ ª¤Áæü €Øæð´ ×é€Ì ãæðÌè ãñ?

11. Differentiate between ‘Mitosis’ and ‘Meiosis’. Give one example of each of these.

â×âê˜æè çßÖæÁÙ ÌÍæ ¥Ïüâê˜æè çßÖæÁÙ ×ð´ ¥´ÌÚU ÕÌ槰РÂýˆØð·¤ ·¤æ °·¤ °·¤ ©ÎæãÚU‡æ ÎèçÁ°Ð

12. What is meant by third degree burn ? What first aid would you give to a person who has received such burn ?

ÒÌëÌèØ SÌÚU ·¤æ ÁÜÙæÓ âð €Øæ ¥çÖÂýæØ ãñ? §â SÌÚU âð ÁÜð ÃØç€Ì ·¤æð ¥æ €Øæ ÂýæÍç×·¤ ©Â¿æÚU Îð´»ð?

13. What is haemoglobin ? Name the blood cells which contain haemoglobin. Write one important function of haemoglobin.

ãè×æð‚ÜæðçÕÙ €Øæ ãñ? ©â L¤çÏÚU ·¤æðçàæ·¤æ ·¤æ Ùæ× ÕÌ槰 çÁâ×ð´ Øã ãæðÌæ ãñ? ãè×æð‚ÜæðçÕÙ ·¤æ °·¤ ·¤æØü ÕÌ槰Ð

1

2

2

2

2

14. Explain why does a sewing needle have a sharp pointed tip ? 2

â×Ûæ槰 ç·¤ çâÜÙð ßæÜè âé§ü ·¤è Ùæð·¤ ÌðÁ Ùé·¤èÜè €Øæð´ ãæðÌè ãñ?

15. Draw a ray diagram to explain formation of small and erect image of big object in a rear view mirror of a car.

·¤æÚU ×ð´ ÂèÀðU ·ð¤ ÎëàØ Îð¹Ùð ·ð¤ çÜ° Ü»ð ÎÂü‡æ ×ð´ °·¤ ÕǸè ßSÌé ·ð¤ ÀUæðÅðU ¥æñÚU âèÏð ÂýçÌçÕÕ ·¤æ ÕÙÙæ â×ÛææÙð

·ð¤ çÜ° °·¤ ç·¤ÚU‡æ ¥æÚðU¹ ¹è´ç¿°Ð

16. An element ‘A’ has atomic number 12 and ‘B’ has atomic number 8. What type of bond will be formed between them and why ? Write the formula of the compound formed.

°·¤ ̈ß

^‘A’

·¤è ÂÚU×æ‡æé ⴁØæ

¹²

ãñ ÌÍæ ̈ß

^‘B’

·¤è ÂÚU×æ‡æé ⴁØæ

⁸

ãñÐ §Ù·ð¤ Õè¿ ç·¤â Âý·¤æÚU ·¤æ

¥æÕ´Ï ÕÙð»æ ¥æñÚU €Øæ´ð? §â Âý·¤æÚU ÕÙÙð ßæÜð Øæñç»·¤ ·¤æ âê˜æ çÜç¹°Ð

17. (a) Write the SI unit of work in terms of base units. What is the special name and symbol of this unit ?

(b) Represent the following measurements by using suitable SI prefixes : (i) Radius of Sun 5 6.9310⁸ m

(ii) Radius of hydrogen atom 5 5310²¹¹ m

(a)

·¤æØü ·¤æ

SI

×æ˜æ·¤ ×êÜ ×æ˜æ·¤ ·ð¤ ÂÎæð´ ×ð´ çÜç¹°Ð §â ×æ˜æ·¤ ·¤æ çßçàæcÅU Ùæ× ÌÍæ ÂýÌè·¤ €Øæ ãñ?

(b)

©ÂØé€Ì

SI

Âêßü܂Ùæð´ ·¤æ ÂýØæð» ·¤ÚU çِÙçÜç¹Ì ×æÂæð´ ·¤æð çÙM¤çÂÌ ·¤èçÁ° Ñ

(i)

âêØü ·¤è ç˜æ’Øæ

^{5 6.93108 m}

(ii)

ãæ§ÇþUæðÁÙ ·ð¤ °·¤ ÂÚU×æ‡æé ·¤è ç˜æ’Øæ

^{5 5310211 m}

18. Write the name and structure of the (i) simplest alkyne and (ii) simplest alkene. Also write the general formula of homologous series of alkenes.

(i)

âÕâð âÚUÜ °Ë·¤æ§Ù ÌÍæ

⁽ⁱⁱ⁾

âÕâð âÚUÜ °Ë·¤èÙ ·¤æ Ùæ× ÌÍæ â´ÚU¿Ùæ çÜç¹°Ð °Ë·¤èÙæð´ ·¤è âÁæÌèØ

Ÿæð‡æè ·ð¤ çÜ° âæ×æ‹Ø âê˜æ Öè çÜç¹°Ð

2

2

4

4

19. What is meant by ozone hole ? What are its causes ? Write two hazards of ozone hole.

Suggest two ways to prevent damage to ozone layer.

¥æðÁæðÙ çÀUÎý ·¤æ ¥Íü €Øæ ãñ? §â·ð¤ ÕÙÙð ·ð¤ €Øæ ·¤æÚU‡æ ãñ´? ¥æðÁæðÙ çÀUÎý âð ãæðÙð ßæÜð Îæð ¹ÌÚðU ÕÌ槰Ð

¥æðÁæðÙ ÂÚUÌ ·¤æð ¥ßÿæØ âð Õ¿æÙð ·ð¤ çÜ° Îæð ÌÚUè·ð¤ âéÛæ槰Ð

20. Give reasons for the following : 4

(a) An iron nail sinks in water whereas huge ship floats in water.

(b) A fielder moves his hands backward while catching a fast moving cricket ball.

çِÙçÜç¹Ì ·ð¤ çÜ° ·¤æÚU‡æ ÕÌ槰 Ñ

(a)

°·¤ Üæðãð ·¤è ·¤èÜ ÂæÙè ×ð´ ÇêUÕ ÁæÌè ãñ ÁÕç·¤ çßàææÜ ÁãæÁ ÂæÙè ×ð´ ÌñÚUÌæ ÚUãÌæ ãñÐ

(b)

ÌðÁ »çÌ âð ¥æÌè ç·ý¤·ð¤ÅU »ð´Î ·¤æð Ü·¤Ìð â×Ø ÿæð˜æ ÚUÿæ·¤ ¥ÂÙð ãæÍæð´ ·¤æð ÂèÀðU ·¤è ¥æðÚU Üð ÁæÌæ ãñÐ

21. (a) Define a gene with respect to its chemical nature. Explain the difference in the gene combination of two persons having blood group A and O.

(b) Name any one genetic disorder. Explain its cause and write its symptoms.

(a)

ÁèÙ ·¤è ÂçÚUÖæáæ §â·¤è ÚUæâæØçÙ·¤ Âý·ë¤çÌ ·ð¤ â´ÎÖü ×ð´ ·¤èçÁ°Ð ÚU€Ì â×êã

A

ÌÍæ

O

ßæÜð Îæð ÃØç€ÌØæð´ ·ð¤ ÁèÙ â´ØæðÁÙ ×ð´ ¥´ÌÚU ·¤æð â×Ûæ槰Ð

(b)

ç·¤âè °·¤ ¥æÙéß´çàæ·¤ çß·¤æÚU ·¤æ Ùæ× ÕÌ槰Р§â·ð¤ ãæðÙð ·ð¤ ·¤æÚU‡æ â×Ûæ槰 ÌÍæ §â·ð¤ Üÿæ‡æ çÜç¹°Ð

22. Give reasons for the following : 4

(i) During severe winter acquatic animals do not die even in frozen lake.

(ii) A green layer is formed on a statue made of copper after some time.

çِÙçÜç¹Ì ·ð¤ çÜ° ·¤æÚU‡æ ÕÌ槰 Ñ

(i)

¥ˆØçÏ·¤ âÎèü ·ð¤ ÎæñÚUæÙ Á×è ãé§ü ÛæèÜ ×ð´ Öè ÁÜèØ Á‹Ìé Ùãè´ ×ÚUÌð ãñ´Ð

(ii)

·é¤ÀU â×Ø Âà¿æÌ Ìæ¡Õð ·¤è ×êçÌü ÂÚU ãÚðU Ú´U» ·¤è ÂÚUÌ ÕÙ ÁæÌè ãñÐ

4

4

23. Consider the following electric circuit. 4

Calculate :

(a) The reading of ideal ammeter A in the circuit.

(b) The reading of voltmeter V connected across 3 V resistor.

Ùè¿ð çΰ »° çßléÌ ÂçÚUÂÍ ÂÚU çß¿æÚU ·¤èçÁ° Ñ

»‡æÙæ ·¤èçÁ° Ñ

(a)

ÂçÚUÂÍ ×ð´ Ü»ð ¥æÎàæü °ð×èÅUÚU

^A

·¤æ ÂæÆUKæ´·¤

(b) 3 V

ÂýçÌÚUæðÏ ·ð¤ çâÚðU âð ÁéǸð ßæðËÅU×èÅUÚU

^V

·¤æ ÂæÆUKæ´·¤

24. (a) State (i) law of constant proportion and (ii) law of multiple proportion 4 (b) Nitrogen forms three oxides : NO, NO₂ and N₂O₃.

Show that these obey law of multiple proportion.

[Given : At. mass N514 u, O516 u]

(a) (i)

çSÍÚU â×æÙéÂæÌ çÙØ× ÌÍæ

⁽ⁱⁱ⁾

»éç‡æÌ ¥ÙéÂæÌ çÙØ× ·ð¤ ·¤ÍÙ çÜç¹°Ð

(b)

Ùæ§ÅþUæðÁÙ âð ÌèÙ ÌÚU㠷𤠥æò€âæ§ÇU ÕÙÌð ãñ´ Ñ

NO, NO₂

¥æñÚU

N₂O₃

Ð çιæ§Øð ç·¤ Øð »éç‡æÌ ¥ÙéÂæÌ çÙØ× ·¤æ ¥ÙéâÚU‡æ ·¤ÚUÌð ãñ´Ð

[

çÎØð »Øð

^:

ÂÚU×æ‡æé â´ãçÌ

At. mass N514 u, O516 u]

25. Explain the postulates of Bohr’s model of atom. How does this model of atom explain the stability of the atom ?

ÕæðÚU ·ð¤ ÂÚU×æ‡æé ×æòÇUÜ ·¤è ¥ßÏæÚU‡ææ°¡ â×Ûæ槰РØã ×æòÇUÜ ÂÚ×æ‡æé ·¤è çSÍÚUÌæ ·¤è ÃØæØæ ·ñ¤âð ·¤ÚUÌæ ãñ?

26. What is the difference between multiple cropping and mixed cropping ? Explain why these two methods are considered better from the perspective of food security ?

ç×çŸæÌ ¹ðÌè ÌÍæ Õãé ȤâÜæðˆÂæÎÙ ×𴠀Øæ ¥´ÌÚU ãñ? ÃØæØæ ·¤èçÁ° ç·¤ ¹æl âéÚUÿææ ·¤è ÎëçcÅU âð Øð ÎæðÙæð´

çßçÏØæ¡ €Øæð´ ÕðãÌÚU ×æÙè ÁæÌè ãñ´?

4

4

27. Consider the following chemical reaction and answer the questions that follow : 4 H₂(g)1Cl₂(g) ® 2 HCl (g)

(i) Which substance has been oxidized and why ? (ii) Which substance has been reduced and why ?

(iii) Which substance is acting as oxidising agent and why ? (iv) Which substance is acting as reducing agent and why ? (v) Name the type of chemical reaction.

çِÙçÜç¹Ì ÚUæâæØçÙ·¤ â×è·¤ÚU‡æ ÂÚU çß¿æÚU ·¤èçÁ° ¥æñÚU ¥æ»ð çΰ »° ÂýàÙæ𴠷𤠩žæÚU ÎèçÁ° Ñ

H₂(g)1Cl₂(g) ® 2 HCl (g)

(i)

·¤æñÙ âð ÂÎæÍü ·¤æ ©Â¿ØÙ ãæðÌæ ãñ ¥æñÚU €Øæð´?

(ii)

·¤æñÙ âð ÂÎæÍü ·¤æ ¥Â¿ØÙ ãæðÌæ ãñ ¥æñÚU €Øæð´?

(iii)

·¤æñÙ âæ ÂÎæÍü ¥æ€âè·¤æÚU·¤ ãñ ¥æñÚU €Øæð´?

(iv)

·¤æñÙ âæ ÂÎæÍü ¥Â¿æØ·¤ ãñ ¥æñÚU €Øæð´?

(v)

ÚUæâæØçÙ·¤ ¥çÖç·ý¤Øæ ·¤æ Âý·¤æÚU ÕÌ槰Ð

28. List the nutrients which are part of a balanced diet. How does each of these nutrients keep us healthy ? Deficiency of which nutrient in the diet causes ‘ Kwashiorkor’ disease in the children ?

©Ù Âæðá·¤ ÂÎæÍæðZ ·¤è âê¿è ÕÙ槰 Áæð ã×æÚðU â´ÌéçÜÌ ¥æãæÚU ·¤æ Öæ» ¥ßàØ ãæðÙð ¿æçã°Ð ÕÌ槰 ç·¤ §Ù×ð´ âð ÂýˆØð·¤ Âæðá·¤ ã×ð´ SßS‰Ø ÚUãÙð ×ð´ ·ñ¤âð âãæØÌæ ·¤ÚUÌæ ãñ? ÖæðÁÙ ×ð´ ç·¤â Âæðá·¤ ÂÎæÍü ·¤è ·¤×è ·ð¤ ·¤æÚU‡æ Ց¿æð´ ×ð´ ҀßæçàæØæðÚU·¤æðÚÓU ÚUæð» ãæðÌæ ãñ?

29. (a) Explain the principle of working of an electric generator. Draw a labelled diagram showing different parts of a D.C. generator.

(b) Can electric current be generated by rotating the magnets and keeping the coil of wire stationary in a generator ? Give reason for your answer.

(a)

çßléÌ ÁçÙ˜æ ·¤è ·¤æØüçßçÏ ·ð¤ çâhæ‹Ì ·¤è ÃØæØæ ·¤èçÁ°Ð °·¤ Ùæ×æ´ç·¤Ì ÚðU¹æ翘æ ÕÙæ·¤ÚU °·¤çÎcÅU ÏæÚUæ ÁçÙ˜æ ·ð¤ çßç֋٠Öæ» Îàææü§°Ð

(b)

Áç٘æ ×𴠀Øæ ÌæÚUæð´ ·¤è ·é¤‡ÇUÜè ·¤æð çSÍÚU ÚU¹·¤ÚU ÌÍæ ¿éÕ·¤ ·¤æð ƒæé×æ·¤ÚU çßléÌ ©ˆÂ‹Ù ·¤ÚU â·¤Ìð ãñ´?

¥ÂÙ𠩞æÚU ·ð¤ çÜ° ·¤æÚU‡æ ÎèçÁ°Ð

6

6

30. Write main characteristics of the following types of elements. Where are they located in the modern periodic table ?

(i) Metalloids (ii) Transition elements

(iii) Noble gases (iv) Main group elements

çِÙçÜç¹Ì Âý·¤æÚU ·ð¤ ̈ßæð´ ·¤è Âý×é¹ çßàæðáÌæ°´ çÜç¹°Ð Øã Öè ÕÌ槰 ç·¤ Øã ¥æÏéçÙ·¤ ¥æßÌü âæÚU‡æè ×ð´

·¤ãæ¡ çSÍÌ ãñ´?

(i)

©ÂÏæÌé

⁽ⁱⁱ⁾

â´·ý¤×‡æ ̈ß

(iii)

©ˆ·ë¤cÅU »ñâ

^(iv)

×éØ ß»ü ̈ß

- o O o -

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