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

§â ÂýàÙ-˜æ ×ð´

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ÂýàÙ ÌÍæ

¹¹

×éçÎýÌ ÂëcÆU ãñ´Ð

Roll No.

¥Ùé·ý¤×æ´·¤

^{Code No.}

·¤æðÇU Ù´. 49/HIS/1

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.

49/HIS/1-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 49/HIS/1-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. An element ‘X’ reacts with oxygen to form oxide. This oxide dissolves in water to form a solution which turns blue litmus red. This oxide also reacts with NaOH to form salt.

The element ‘X’ is :

(A) Carbon (B) Sodium

(C) Calcium (D) Magnesium

°·¤ ̈ß

^‘X’

¥æò€âèÁÙ ·ð¤ âæÍ ç·ý¤Øæ ·¤ÚU·ð¤ °·¤ ¥æò€âæ§ÇU ÕÙæÌæ ãñÐ Øã ¥æò€âæ§ÇU ÂæÙè ×𴠃æéÜ·¤ÚU çßÜØÙ ÕÙæÌæ ãñ Áæð ÙèÜð çÜÅU×â ·¤æð ÜæÜ ·¤ÚU ÎðÌæ ãñÐ ßã ¥æò€âæ§ÇU

NaOH

·ð¤ âæÍ ç·ý¤Øæ ·¤ÚU·ð¤ Ü߇æ ÕÙæÌæ ãñР̈ß

‘X’

ãñ Ñ

(A)

·¤æÕüÙ

^(B)

âæðçÇUØ×

(C)

·ñ¤çËàæØ×

^(D)

×ñ‚ÙèçàæØ×

2. Which of the following is not the characteristic of ‘Xerophytes’ ? (A) Succulent leaves and stems (B) Few or no leaves

(C) Large number of stomata (D) Deep wide spread root system

çِÙçÜç¹Ì ×ð´ âð ·¤æñÙ Ò×M¤Î÷çÖÎÓ ·¤æ ¥çÖÜÿæ‡æ Ùãè´ ãñ?

(A)

×æ¡âÜ ÌÙð ß ÂçžæØæ¡

(B)

ÂçžæØæ¡ Øæ Ìæð ·¤× ãæðÌè ãñ´ Øæ Ùãè´ ãæðÌè ãñ´

(C)

ÕǸè ⴁØæ ×ð´ SÅUæð×ðÅUæ ãæðÌð ãñ´

(D)

çß·¤çâÌ ×êÜ-Ì´˜æ

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

1

1 3. The clouds formed in the sky are an example of :

(A) Emulsion (B) Suspension (C) Foam (D) Aerosol

¥æ·¤æàæ ×ð´ ÕÙð ÕæÎÜ ©ÎæãÚU‡æ ãñ´ Ñ

(A)

ÂæØâ ·¤æ

(B)

çÙܐÕÙ ·¤æ

(C)

Ûææ» ·¤æ

(D)

°ØÚUæðâæðÜ ·¤æ

4. When the fingers of a person accidently touch a hot metal object, he withdraws fingers instantaneously. This involuntary action of the person is controlled by :

(A) Cerebrum (B) Cerebellum

(C) Medulla oblongata (D) Spinal cord

ÁÕ ç·¤âè ÃØç€Ì ·¤è ©´»çÜØæ¡ ÎéƒæüÅUÙæßàæ °·¤ »×ü ÏæÌé ·¤è ßSÌé ·¤æð ÀêU Áæ°¡ ÌÕ ßã ÃØç€Ì ©´»çÜØæ¡ Ìˆ·¤æÜ ßæÂ⠹贿 ÜðÌæ ãñÐ ÃØç€Ì ·¤è Øã ¥Ùñç‘ÀU·¤ ç·ý¤Øæ çِÙçÜç¹Ì ×ð´ âð ç·¤â·ð¤ mæÚUæ çÙØ´ç˜æÌ ãæðÌè ãñ?

(A)

Âý×çSÌc·¤

(B)

¥Ùé×çSÌc·¤

(C)

×ðÇéUÜæ ¥æòŽÜæ´»ñÅUæ

(D)

×ðM¤-ÚU’Áé

5. What will happen if two electric bulbs of 25 W and 100 W both rated at 220 V are connected to the main 220 V supply in series ?

(A) Electric bulb of 100 W will only glow

(B) Both electric bulbs will glow with equal brightness

(C) Electric bulb of 100 W will glow brighter than electric bulb of 25 W (D) Electric bulb of 25 W will glow brighter than electric bulb of 100 W

220 V

·ð¤ çÜ° ¥Ùé×Ì °ß´ oýð‡æè ·ý¤× ×ð´ ÁéǸð

25 W

¥æñÚU

100 W

·ð¤ Îæð çßléÌ ÕËÕæð´ ·¤æð

220 V

·ð¤ ×éØ dæðÌ âð ÁæðǸÙð ÂÚU €Øæ ãæð»æ?

(A)

·ð¤ßÜ

^{100 W}

·¤æ çßléÌ ÕËÕ Âý·¤æçàæÌ ãæð»æ

(B)

ÎæðÙæð´ çßléÌ ÕËÕ â×æÙ ¿×·¤ âð Âý·¤æçàæÌ ãæð´»ð

(C) 25 W

·ð¤ çßléÌ ÕËÕ ·¤è ¥Âðÿææ

^{100 W}

·¤æ çßléÌ ÕËÕ ¥çÏ·¤ ¿×·¤ âð Âý·¤æçàæÌ ãæð»æ

(D) 100 W

·ð¤ çßléÌ ÕËÕ ·¤è ¥Âðÿææ

^{25 W}

·¤æ çßléÌ ÕËÕ ¥çÏ·¤ ¿×·¤ âð Âý·¤æçàæÌ ãæð»æ

1

1

1 6. Which of the following communicable diseases is caused by virus ?

(A) Amoebiasis (B) Dengue fever

(C) Malaria (D) Tuberculosis

çِÙçÜç¹Ì ×ð´ âð ·¤æñÙ âæ â´·ý¤æ×·¤ ÚUæð» ßæØÚUâ mæÚUæ ãæðÌæ ãñ?

(A)

¥×èÕæØçââ

^(B)

Çð´U‚Øê ’ßÚU

(C)

×ÜðçÚUØæ

^(D)

ÌÂðçη¤

7. In water purifiers, which of the following form of carbon is used for adsorbing coloured impurities and foul odours from water ?

(A) Graphite (B) Coke

(C) Activated charcoal (D) Carbon black

ÂæÙè àæéh ·¤ÚUÙð ßæÜð ؋˜æ ×ð´ ÂæÙè âð Ú´U»èÙ ç×ÜæßÅU ¥æñÚU ÕéÚUè »´Ï ¥çÏàææðá‡æ ·ð¤ çÜ° çِÙçÜç¹Ì ×ð´ âð

·¤æÕüÙ ·¤æ ·¤æñÙ âæ M¤Â ©ÂØæð» ×ð´ ÜæØæ ÁæÌæ ãñ?

(A)

»ýðȤæ§ÅU

^(B)

·¤æð·¤

(C)

âç·ý¤çØÌ ¿æÚU·¤æðÜ (Ü·¤Ç¸è ·¤æ ·¤æðØÜæ)

^(D)

·¤æÕüÙ ŽÜñ·¤

8. Which of the following processes is not an exothermic reaction ? (A) The process of digestion of food by human beings

(B) The rusting of iron nails

(C) The decomposition of vegetable matter into compost (D) Burning of natural gas

çِÙçÜç¹Ì ×ð´ âð ·¤æñÙ âè Âýç·ý¤Øæ ª¤c×æÿæðÂè ¥çÖç·ý¤Øæ Ùãè´ ãñ?

(A)

×æÙß ×ð´ ÖæðÁ٠¿æÙð ·¤è Âýç·ý¤Øæ

(B)

Üæðãð ·¤è ·¤èÜæð´ ×ð´ Á´» Ü»Ùæ

(C)

ßæÙSÂçÌ·¤ ÂÎæÍü ·¤æ ¥ÂƒæÅUÙ ãæðÙð ÂÚU ¹æÎ ÕÙæÙæ

(D)

Âýæ·ë¤çÌ·¤ »ñâ ·¤æ ÁÜÙæ

1

1

9. Two spring balances A and B are being pulled apart as shown in the figure given below :

The reading in balance B is 4 N. The reading in balance A will be :

(A) zero (B) 2 N (C) 4 N (D) 8 N

Îæð ·¤×æÙèÎæÚU ÌéÜæ°¡

A

ÌÍæ

B

·¤æð °·¤ ÎêâÚðU ·ð¤ çßÂÚUèÌ ¹è´¿æ ÁæÌæ ãñ Áñâæ ç·¤ Ùè¿ð çΰ »° 翘æ ×ð´ çιæØæ

»Øæ ãñÐ

·¤×æÙèÎæÚU ÌéÜæ

^B

·¤æ ÂæÆ÷Øæ´·¤

^{4 N}

ãñÐ ·¤×æÙèÎæÚU ÌéÜæ

^A

·¤æ ÂæÆKæ´·¤ ãæð»æ Ñ

(A)

àæê‹Ø

^{(B) 2 N (C) 4 N (D) 8 N}

10. A chemical factory discharges its waste that is rich in nitrates into a water body. How does it affect the population of fishes in the water bodies ? Explain.

°·¤ ÚUæâæØçÙ·¤ ·¤æÚU¹æÙæ Ùæ§ÅþðUÅU Øé€Ì ¥ÂçàæcÅU ÂÎæÍæðZ ·¤æð ÁÜ ·é´¤ÇU ×ð´ ÂýßæçãÌ ·¤ÚU ÎðÌæ ãñÐ Øã ÁÜ ·é´¤ÇU ×ð´

×ÀUçÜØæð´ ·¤è ¥æÕæÎè ÂÚU €Øæ ÂýÖæß ÇUæÜð»æ? ÃØæØæ ·¤èçÁ°Ð

11. Why is it wrong to blame a mother only for giving birth to a female child ? Explain with the help of chromosomal basis of sex determination.

·ð¤ßÜ ×æÎæ â´ÌæÙ ©ˆÂ‹Ù ·¤ÚUÙð ·ð¤ çÜ° ×æ¡ ·¤æð ãè Îæðá ÎðÙæ €Øæð´ »ÜÌ ãñ? çÜ´» çÙÏæüÚU‡æ ·ð¤ »é‡æ âê˜æè ¥æÏæÚU

·¤è âãæØÌæ âð â×Ûæ槰Ð

12. State law of constant proportion. In magnesium oxide, magnesium and oxygen are present in the ratio of 3 : 2 by mass. In a chemical reaction 6 g magnesium powder was ignited in a container having 12 g of pure oxygen. After the completion of the chemical reaction, it was found that 8 g of oxygen was left unreacted. Show that these observations are in accordance with the law of constant proportions.

çSÍÚU ¥ÙéÂæÌ ·¤æ çÙØ× ÕÌæ§ØðÐ ×ñ‚ÙèçàæØ× ¥æò€âæ§ÇU ×ð´ ×ñ‚ÙèçàæØ× ¥æñÚU ¥æò€âèÁÙ ÎýÃØ×æÙæÙéâæÚU

3 : 2

¥ÙéÂæÌ ×ð´ ãæðÌð ãñ´Ð ç·¤âè ÚUæâæØçÙ·¤ ¥çÖç·ý¤Øæ ×ð´

^{6 g}

×ñ‚ÙèçàæØ× ·¤æð °·¤ ÕÌüÙ, çÁâ×ð´

^{12 g}

àæéh

¥æò€âèÁÙ ãñ, ÁÜæØæ »ØæÐ ¥çÖç·ý¤Øæ â×æŒÌ ãæðÙð ·ð¤ Âà¿æÌ

^{8 g}

¥æò€âèÁÙ ¥ÙçÖ·ë¤Ì ÂæØè »§üÐ Îàææü§°

ç·¤ Øð Âðýÿæ‡æ çSÍÚU ¥ÙéÂæÌ ·ð¤ çÙØ× ·ð¤ ¥ÙéâæÚU ãñ´Ð

1

2

2

2

4 13. On what factors does the buoyant force acting on a body immersed in a fluid depend ?

What will happen when the buoyant force acting on a body is equal to its own weight ?

ÌÚUÜ ×æŠØ× ×ð´ ÇéUÕæð° »° ç·¤âè ç‡ÇU ÂÚU Ü»Ùð ßæÜ𠩈ŒÜæßÙ ÕÜ ·¤æ ÂçÚU×æ‡æ ç·¤Ù ·¤æÚU·¤æð´ ÂÚU çÙÖüÚU ·¤ÚUÌæ ãñ? ØçÎ ç·¤âè ç´ÇU ÂÚU Ü»Ùð ßæÜæ ©ˆŒÜæßÙ ÕÜ ç´ÇU ·ð¤ ÖæÚU ·ð¤ ÕÚUæÕÚU ãæð Ìæð €Øæ ãæð»æ?

14. Draw symbols of the following devices used in electric circuit diagram :

(i) Battery (ii) A closed plug key

(iii) Electric fuse and (iv) An electric bulb

çßléÌ ÂçÚUÂÍ ×ð´ ÂýØé€Ì ãæðÙð ßæÜð çِÙçÜç¹Ì Øéç€ÌØæð´ ·ð¤ çÜ° ÂýÌè·¤ ÕÙ槰 Ñ

(i)

ÕñÅUÚUè

(ii)

Õ´Î ŒÜ» ·é´¤Áè

(iii)

ßñléÌ ØêÁ ÌÍæ

^(iv)

çßléÌ ÕËÕ

15. Name the part of human cell which contains network of chromosomes present as chromatin. Write one function of this part.

×æÙß ·¤æðçàæ·¤æ ·ð¤ ©â Öæ» ·¤æ Ùæ× ÕÌ槰 çÁâ×ð´ ·ý¤æð×ðçÅUÙ ·ð¤ M¤Â ×ð´ ©ÂçSÍÌ ·ý¤æð×æðâæð×â ·¤æ ÙðÅUß·ü¤ ÂæØæ ÁæÌæ ãñÐ §â Öæ» ·¤æ °·¤ ·¤æØü çÜç¹°Ð

16. What is the cause of rainbow formation during the rainy season ? Which of the seven colours seen in rainbow has

(i) maximum wavelength and (ii) minimum wavelength ?

ßáæü «¤Ìé ×ð´ §‹ÎýÏÙéá ÕÙÙð ·¤æ €Øæ ·¤æÚU‡æ ãñ? §‹ÎýÏÙéá ·ð¤ âæÌ ÚU´»æð´ ×ð´ ç·¤â Ú´U» ·¤æ ÌÚ´U»ÎñŠØü

(i)

¥çÏ·¤Ì× ãæðÌæ ãñ, ÌÍæ

⁽ⁱⁱ⁾

‹ØêÙÌ× ãæðÌæ ãñ?

17. Differentiate between base SI units and derived SI units. Derive the SI unit of weight.

×êÜ

^SI

×æ˜æ·¤æð´ ß ÃØéˆÂ‹Ù

^SI

×æ˜æ·¤æð´ ×ð´ ¥´ÌÚU ·¤èçÁ°Ð ÖæÚU ·¤æ

^SI

×æ˜æ·¤ ÃØéˆÂ‹Ù ·¤èçÁ°Ð

2

2

2

2

4

4

4 18. Give reasons for the following :

(i) Treaded tyres are used in a car instead of flat tyres.

(ii) When we shake a wet piece of cloth after washing, water droplets come out of it.

çِÙçÜç¹Ì ·ð¤ çÜ° ·¤æÚU‡æ ÕÌ槰 Ñ

(i)

ÜñÅU ÅUæØÚUæð´ ·¤è ¥Âðÿææ ·¤æÚUæð´ ×𴠹桿ðÎæÚU ÅUæØÚU ©ÂØæð» ×ð´ Üæ° ÁæÌð ãñ´Ð

(ii)

ÏæðÙð ·ð¤ Âà¿æÌ ÁÕ ã× Öè»ð ·¤ÂǸ𠷤æð ÛæÅU·¤Ìð ãñ´ Ìæð ©â×ð´ âð ÂæÙè ·¤è Õê´Îð´ ÕæãÚU çÙ·¤ÜÌè ãñ´Ð

19. Draw the chemical structure of Butane and Isobutane. Justify that they are isomers.

ŽØêÅðUÙ ¥æñÚU ¥æ§âæðŽØêÅðUÙ ·¤è ÚUæâæØçÙ·¤ â´ÚU¿Ùæ ÕÙ槰РÎàææü§° ç·¤ Øð ÎæðÙæð´ Øæñç»·¤ â×æßØßè ãñ´Ð

20. List the raw materials required for the manufacture of bleaching powder. Describe the method to manufacture it with the help of a labelled diagram. Write the chemical equation for the reaction involved.

ŽÜèç¿´» Âæ©ÇUÚU ·ð¤ çÙ×æü‡æ ×ð´ ©ÂØæð» ·¤è ÁæÙð ßæÜè ¥æßàØ·¤ âæ×»ýè (·¤‘¿ð ×æÜ) ·¤è âê¿è ÕÙ槰РÙæ×æ´ç·¤Ì ç¿˜æ ·¤è âãæØÌæ âð §â·¤è çÙ×æü‡æ çßçÏ ·¤æ ߇æüÙ ·¤èçÁ°Ð §â çßçÏ ×ð´ ãæðÙð ßæÜè ¥çÖç·ý¤Øæ ·¤æ ÚUæâæØçÙ·¤ â×è·¤ÚU‡æ çÜç¹°Ð

21. Write Darwin’s two major contributions with regard to evolution. What is the function of ‘Natural Selection’ ? With which group of animals do humans share their immediate ancestors ?

çß·¤æâ â´Õ´Ïè ÇUæçßüÙ ·ð¤ Îæð Âý×é¹ Øæð»ÎæÙ çÜç¹°Ð ÒÂýæ·ë¤çÌ·¤ ßÚU‡æÓ ·¤æ €Øæ ·¤æØü ãñ? Âàæé¥æð´ ·ð¤ ç·¤â â×êã ·ð¤ çÙ·¤ÅUÌ× ÂêßüÁ ×ÙécØ ·ð¤ çÙ·¤ÅUÌ× ÂêßüÁæð´ ·ð¤ çÕÚUæÎÚU Íð?

22. (a) Can a bimetallic strip made of silver and brass be used as thermostat in heating and cooling devices ? Give reasons for your answer.

(Given a for brass and silver 5 18310²⁶ per degree Celsius)

(b) All other conditions remaining identical which will cause more severe burns steam at 1008C or water at 1008C ? Give reasons for your answer.

(a)

»×ü ß ÆU‡ÇUæ ·¤ÚUÙð ßæÜð ©Â·¤ÚU‡ææð´ ×𴠀Øæ ¿æ¡Îè ¥æñÚU ÂèÌÜ ·¤è ÕÙè çmÏæÌé Â^è ·¤æ ©ÂØæð» ÌæÂSÍæ·¤

·ð¤ M¤Â ×ð´ ç·¤Øæ Áæ â·¤Ìæ ãñ? ¥ÂÙ𠩞æÚU ·ð¤ çÜ° ·¤æÚU‡æ ÕÌ槰Ð

(

çÎØæ ãñ; ÂèÌÜ ¥æñÚU ¿æ¡Îè ·ð¤ çÜ°

a

·¤æ ×æÙ

18310²⁶ 8C²¹

ãñ

)

(b)

¥‹Ø âÖè Îàææ°¡ â×æÙ ãæð Ìæð

^{1008 C}

·ð¤ ßæc ÌÍæ

^1008C

·ð¤ ÁÜ âð ÁÜÙð ÂÚU ·¤æñÙ ¥çÏ·¤ »´ÖèÚU

ƒææß ÎðÌæ ãñ? ¥ÂÙ𠩞æÚU ·ð¤ çÜ° ·¤æÚU‡æ ÕÌ槰Ð

4

4

23. What is meant by ozone hole ? Explain the causes for its formation over Antarctic regions. Why is the formation of ozone hole a cause of worry for human beings ? Give two important reasons in support of your answer.

¥æð$ÁæðÙ çÀUÎý âð €Øæ ¥çÖÂýæØ ãñ? ¥´ÅUæç€ÅüU·¤ ÿæð˜æ ×ð´ ¥æð$ÁæðÙ çÀUÎý ÕÙÙð ·ð¤ ·¤æÚU‡ææð´ ·¤è ÃØæØæ ·¤èçÁ°Ð ×æÙßæð´

·ð¤ çÜ° ¥æð$ÁæðÙ çÀUÎý ·¤æ ÕÙÙæ €Øæð´ ç¿´Ìæ ·¤æ çßáØ ãñ? ¥ÂÙ𠩞æÚU ·ð¤ â×ÍüÙ ×ð´ Îæð ×ãˆßÂê‡æü ·¤æÚU‡æ ÕÌ槰Ð

24. Describe the unique property of water in respect of its thermal expansion as compared to other liquids. Explain, why aquatic animals living in a lake of very cold region do not die in severe winter despite of frozen surface of lake ?

¥‹Ø Îýßæð´ ·¤è ÌéÜÙæ ×ð´ ÂæÙè ×ð´ ª¤c×èØ ÂýâæÚU ·ð¤ ¥âæ×æ‹Ø »é‡æ ·¤æ ߇æüÙ ·¤èçÁ°Ð ¥ˆØçÏ·¤ Æ´UÇðU ÿæð˜æ ×ð´

çSÍÌ °·¤ ÛæèÜ ×ð´ ÚUãÙð ßæÜð ÁÜèØ Á‹Ìé ¥ˆØçÏ·¤ Æ´UÇU ·ð¤ ÎæñÚUæÙ ª¤ÂÚUè âÌã ·¤æ ÂæÙè Á×Ùð ÂÚU Öè €Øæð´ Ùãè´

×ÚUÌð ãñ´?

25. Three elements ‘X’, ‘Y’ and ‘Z’ have atomic number 17, 01 and 11. ‘X’ reacts with ‘Y’

and ‘Z’ separately. What type of bond will be formed between ‘X’ and ‘Y’, and ‘X’ and ‘Z’ ? Write the formulae of the compounds formed by the reaction between

‘X’, ‘Y’ and ‘X’, ‘Z’. Compare the electrical conductivities of these two compounds and mention the causes for difference.

Ìè٠̈ß

^{‘X’, ‘Y’}

¥æñÚU

^‘Z’

·¤è ÂÚU×æ‡æé ⴁØæ ·ý¤×àæÑ

^{17, 01}

¥æñÚU

¹¹

ãñÐ

^‘X’

¥Ü»-¥Ü»

^‘Y’

ÌÍæ

^‘Z’

âð ¥çÖç·ý¤Øæ ·¤ÚUÌæ ãñÐ

^‘X’

¥æñÚU

^‘Y’

ÌÍæ

^‘X’

¥æñÚU

^‘Z’

·ð¤ Õè¿ ç·¤â Âý·¤æÚU ·ð¤ ¥æÕ´Ï ÕÙð´»ð?

^‘X’

¥æñÚU

^‘Y’

ÌÍæ

^‘X’

¥æñÚU

^‘Z’

·¤è ¥çÖç·ý¤Øæ âð ÕÙÙð ßæÜð Øæñç»·¤æð´ ·¤æ âê˜æ çܹð´Ð §Ù ÎæðÙæð´ Øæñç»·¤æð´ ·¤è çßléÌ

¿æÜ·¤Ìæ¥æð´ ·¤è ÌéÜÙæ ·¤èçÁ° ÌÍæ ç֋ÙÌæ ·ð¤ çÜ° ·¤æÚU‡æ ÕÌ槰Ð

26. Now-a-days why are farmers being encouraged to use organic manure as a major alternative to fertilizers. Name any three organic manures. Describe how can we use waste vegetable peels, rotten vegetable, leaves and grass etc. to prepare organic manure ?

¥æÁ·¤Ü ç·¤âæÙæð´ ·¤æð ©ßüÚU·¤æð´ ·ð¤ SÍæÙ ÂÚU Áñçß·¤ ¹æÎæð´ ·¤æð Âý×é¹ çß·¤Ë ·ð¤ M¤Â ×ð´ âÌÌ÷ ÂýØæð» ·¤ÚUÙð ·ð¤

çÜ° €Øæð´ ÂýæðˆâæçãÌ ç·¤Øæ Áæ ÚUãæ ãñ? ç·¤‹ãè´ ÌèÙ Áñçß·¤ ¹æÎæð´ ·ð¤ Ùæ× ÕÌ槰Р߇æüÙ ·¤èçÁ° ç·¤ ¥æ Õð·¤æÚU âçŽÁØæð´ ·ð¤ çÀUÜ·¤æð´, âǸè-»Üè âçŽÁØæð´, ÂçžæØæð´ ÌÍæ ƒææâ-Èê¤â ·¤æ ©ÂØæð» Áñçß·¤ ¹æÎ ÕÙæÙð ×ð´ ç·¤â Âý·¤æÚU

·¤Úð´U»ð?

4

4

4

4

4 27. (a) Consider the following chemical reaction between iron and sulphur :

Fe (s) S (s) 1 →heat Fe S (s)

In terms of loss and gain of electrons, explain to which type of reaction is this.

(b) Why do the potato chips manufacturers usually flush in nitrogen gas bags of fried potato chips ? Explain.

(a)

Ùè¿ð çΰ »° ¥æØÚUÙ °ß´ âËȤÚU ·ð¤ Õè¿ ÚUæâæØçÙ·¤ ¥çÖç·ý¤Øæ ÂÚU çß¿æÚU ·¤èçÁ° Ñ

Fe (s) S (s) 1 →heat Fe S (s)

Øã ç·¤â Âý·¤æÚU ·¤è ÚUæâæØçÙ·¤ ¥çÖç·ý¤Øæ ãñ? ¥ÂÙ𠩞æÚU ·¤æ ¥æñç¿ˆØ ÕÌ槰Ð

(b)

翌â çÙ×æüÌæ ¥çÏ·¤ÌÚU ÌÜð ãé° ¥æÜê 翌⠷ð¤ Õñ» ×ð´ Ùæ§ÅþæðÁÙ »ñ⠀Øæð´ ÂýßæçãÌ ·¤ÚUÌð ãñ´? ÃØæØæ

·¤èçÁ°Ð

28. Draw a simple diagram of human excretory system and label (i) kidneys (ii) ureters (iii) urinary bladder and (iv) urethra on it. Write the functions of kidneys. Why is it possible to survive even with one kidney ? Name any one technique which can be used to save a patient whose both kidneys are damaged.

×æÙß ©ˆâÁüÙ Ì´˜æ ·¤æ °·¤ âÚUÜ ¥æÚðU¹ ÕÙ槰 ÌÍæ §â×ð´

⁽ⁱ⁾

ß뀷¤

⁽ⁱⁱ⁾

×ê˜æßæçãÙè

⁽ⁱⁱⁱ⁾

×ê˜ææàæØ ¥æñÚU

(iv)

×ê˜æ ×æ»ü ·¤æð Ùæ×æ´ç·¤Ì ·¤èçÁ°Ð ß뀷¤ ·ð¤ ·¤æØü ÕÌ槰Р·ð¤ßÜ °·¤ ß뀷¤ ·ð¤ âãæÚðU ÁèçßÌ ÚUãÙæ €Øæð´

â´Öß ãñ? °·¤ °ðâæ ÚUæð»è çÁâ·ð¤ ÎæðÙæð´ ß뀷¤ ÿæçÌ»ýSÌ ãñ´, ©â·¤æð Õ¿æÙð ·ð¤ çÜ° ç·¤âè °·¤ Ì·¤Ùè·¤æð´ ·¤æ Ùæ×

ÕÌ槰Ð

29. Explain three reasons of accidents that may be caused in our household circuits using electricity. Describe the role of the following safety devices in preventing these accidents.

Explain.

(i) Electrical fuse (ii) Earthing of electrical appliance

ƒæÚðUÜê çßléÌ ÂçÚUÂÍæð´ ×ð´ çßléÌ ·ð¤ ©ÂØæð» ·ð¤ ÎæñÚUæÙ ãæðÙð ßæÜè ÎéƒæüÅUÙæ¥æð´ ·ð¤ ÌèÙ ·¤æÚU‡ææð´ ·¤è ÃØæØæ ·¤èçÁ° Ð çِÙçÜç¹Ì âéÚUÿææ Øéç€ÌØæð´ ·¤è §Ù ÎéƒæüÅUÙæ¥æð´ ·¤æð ÚUæð·¤Ùð ×𴠀Øæ Öêç×·¤æ ãñ? ÃØæØæ ·¤èçÁ°Ð

(i)

çßléÌ ØêÁ

⁽ⁱⁱ⁾

çßléÌ ©Â·¤ÚU‡ææð´ ·¤æ ÖêâÂ·ü¤Ù

6

6

6 30. (a) State the postulates of Bohr’s model of atom. How could it solve the problem of

stability of atom faced by Rutherford model of atom ?

(b) The atomic number of sulphur is 16. Draw its structure according to Bohr model of atom. What is the number of electrons in its M and N shells ? Write valency of sulphur atom.

(a)

ÕæðÚU ·ð¤ ÂÚU×æ‡æé ×æòÇUÜ ·¤è ¥ßÏæÚU‡ææ°´ ÕÌ槰РÚUÎÚUȤæðÇüU ÂÚU×æ‡æé ×æòÇUÜ ×ð´ ¥æ§ü ÂÚU×æ‡æé ·¤è çSÍÚUÌæ

·¤è â×SØæ ·¤æð §â·ð¤ mæÚUæ ç·¤â Âý·¤æÚU ãÜ ç·¤Øæ »Øæ?

(b)

âËȤÚU ·¤è ÂÚU×æ‡æé ⴁØæ

¹⁶

ãñÐ ÕæðÚU ×æòÇUÜ ·ð¤ ¥ÙéâæÚU §â·¤è â´ÚU¿Ùæ ¹è´ç¿ØðÐ §â·ð¤

^M

¥æñÚU

^N

·¤æðàæ ×ð´ §Üð€ÅþUæÙæð´ ·¤è ⴁØæ ç·¤ÌÙè-ç·¤ÌÙè ãñ? âËȤÚU ÂÚU×æ‡æé ·¤è â´ØæðÁ·¤Ìæ ÕÌ槰Ð

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