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‚¥∑§Á‹Ã ¬⁄UˡÊÊ -

SCIENCE /ÁflôÊÊŸ

Class – IX /∑§ˇÊÊ - IX

ÁŸœÊ¸Á⁄Uà ‚◊ÿ — 3 ÉÊá≈U •Áœ∑§Ã◊ •¥∑§ — 90

Time allowed: 3 hours Maximum Marks: 90

‚Ê◊Êãÿ ÁŸŒ¸‡Ê — (i) ß‚ ¬‡Ÿ ¬òÊ ∑§Ê ÃËŸ ÷ʪʥ, ÷ʪ-•, ÷ʪ-’ •ÊÒ⁄ ÷ʪ-‚U ◊¥ ’Ê¥≈UÊ ªÿÊ „Ò– •Ê¬∑§Ê ÃËŸÊ¥ ÷ʪʥ ∑§ ¬˝‡ŸÊ¥ ∑§ ©ûÊ⁄U Á‹πŸ „Ò¥– (ii) ‚÷Ë ¬‡Ÿ •ÁŸflÊÿ¸ „Ò¥– (iii) ¬Í⁄U ¬‡Ÿ ¬òÊ ◊¥ Á∑§‚UË ¬‡Ÿ ◊¥ ∑§Ê߸ øÿŸ ¬˝Ê# Ÿ„Ë¥ „Ò – (iv) •Ê¬∑§Ê ÷ʪ-•, ÷ʪ-’ •ÊÒ⁄ ÷ʪ-‚U ∑§ ‚÷Ë ¬‡ŸÊ¥ ∑§ ©ûÊ⁄U ¬ÎÕ∑§-¬ÎÕ∑ Á‹πŸ „Ê¥ª– (v) ÷ʪ-• ∑§ ¬‡Ÿ ‚¥ïÿÊ 1 ‚ 3 ∑§ ¬˝‡Ÿ ∞∑§-∞∑§ •¥∑§ ∑§ „Ò¥– ߟ∑§ ©ûÊ⁄U ∞∑§ ‡ÊéŒ •ÕflÊ ∞∑§ flÊÄÿ ◊¥ Œ¥– (vi) ÷ʪ-• ∑§ ¬‡Ÿ ‚¥ïÿÊ 4 fl 5 ¬˝‡Ÿ ŒÊ-ŒÊ •¥∑§Ê¥ ∑§ „Ò¥– ߟ∑§ ©ûÊ⁄U ‹ª÷ª 30 ‡ÊéŒÊ¥ ◊¥ ŒŸ „Ò¥– (vii) ÷ʪ-• ∑§ ¬‡Ÿ ‚¥ïÿÊ 6 ‚ 16 ∑§ ¬‡Ÿ ÃËŸ-ÃËŸ •¥∑§Ê¥ ∑§ „Ò¥– ߟ∑§ ©ûÊ⁄U ‹ª÷ª 50 ‡ÊéŒÊ¥ ◊¥ ŒŸ „Ò¥– (viii) ÷ʪ-• ∑§ ¬‡Ÿ ‚¥ïÿÊ 17 ‚ 21 ∑§ ¬˝‡Ÿ ¬Ê°ø-¬Ê°ø •¥∑§Ê¥ ∑§ „Ò¥– ߟ∑§ ©ûÊ⁄U ‹ª÷ª 70 ‡ÊéŒÊ¥ ◊¥ ŒŸ „Ò¥– (ix) ÷ʪ- ’ ∑§ ÃËŸ ¬˝‡Ÿ, ¬‡Ÿ ‚¥ïÿÊ 22 ‚ 24 ◊ÈQ ¬Ê∆ ¬⁄ •ÊœÊÁ⁄à „¥Ò– ߟ◊¢ ¬˝‡Ÿ ‚¥ïÿÊ 22 ∑§ 2 •¥∑§, ¬‡Ÿ ‚¥ïÿÊ 23 ∑§ 3 •¥∑§

ÃÕÊ 24 ∑§ 5 •¥∑§ „Ò¥– (x) ÷ʪ-‚ ∑§ ¬‡Ÿ ‚¥ïÿÊ 25 ‚ 33 ∑§ ¬˝‡Ÿ ¬˝ÿʪÊà◊∑§ ∑§Ê҇ʋ ¬⁄U •ÊœÊÁ⁄Uà ’„ÈÁfl∑§À¬Ë ¬‡Ÿ „Ò¥– ¬àÿ∑§ ¬˝‡Ÿ ∞∑§ •¥∑§ ∑§Ê „Ò– ÁŒ∞

ªÿ øÊ⁄U Áfl∑§À¬Ê¥ ◊¥ ‚ •Ê¬∑§Ê ‚’‚ ©¬ÿÈÄà Áfl∑§À¬ øÈŸŸÊ „Ò–

(xi) ÷ʪ-‚ ∑§ ¬‡Ÿ ‚¥ïÿÊ 34 ‚ 36 ∑§ ¬˝‡Ÿ ¬˝ÿʪÊà◊∑§ ∑§Ê҇ʋ ¬⁄U •ÊœÊÁ⁄Uà ŒÊ-ŒÊ •¥∑§Ê¥ ∑§ ¬‡Ÿ „Ò¥ – ߟ∑§ ©ûÊ⁄U ‹ª÷ª 30 ‡ÊéŒÊ¥ ◊¥ ŒŸ „Ò¥ –

General Instructions : (i) The question paper comprises of three Sections, A, B and C. You are to attempt all the sections. (ii) All questions are compulsory. (iii) There is no choice in any of the questions. (iv) All questions of Section-A, Section-B and Section-C are to be attempted separately. (v) Question numbers 1 to 3 in Section-A are one mark questions. These are to be answered in one

word or in one sentence. (vi) Question numbers 4 and 5 in Section-A are two marks questions. These are to be answered in

about 30 words each. (vii) Question numbers 6 to 16 in Section-A are three marks questions. These are to be answered in

about 50 words each. (viii) Question numbers 17 to 21 in Section-A are five marks questions. These are to be answered in

about 70 words each. (ix) Section B has 3 OTBA questions. Question number 22 is two marks, Question number 23 is

three marks and Question number 24 is five marks question. (x) Question numbers 25 to 33 in Section-C are multiple choice questions based on practical skills.

Each question is a one mark question. You are to select one most appropriate response out of the four provided to you.

(xi) Question numbers 34 to 36 in section C are two marks questions based on practical skills. These are to be answered in about 30 words each.

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÷ʪ-• / SECTION-A

1 Œ˝√ÿ◊ÊŸ ‚¥⁄UˇÊáÊ ∑§ ÁŸÿ◊ ∑§Ê Œ‡ÊʸŸ ∑§ Á∑§‚Ë ¬ÿʪ ◊¥ ï‹ÊS∑§ ∑§ ◊Èπ ¬⁄U ∑§Ê∑¸§ ÄÿÊ¥ ‹ªÊà „Ò¥?

In an experiment showing law of conservation of mass why is it necessary to put a cork to the mouth of the flask ?

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2 ‚ÊŸ ∑§Ë ¬⁄Uà ∑§ ¬˝ÿʪ ◊¥ ©¬ÿʪ Á∑§∞ ª∞ •À»§Ê∑§áÊÊ¥ ( )42 He++ ◊¥ •ÊÁflC ß‹Ä≈˛UÊÚŸÊ¥, ¬˝Ê≈UÊÚŸÊ¥ ÃÕÊ ãÿÍ≈˛UÊÚŸÊ¥ ∑§Ë

‚¥ïÿÊ ôÊÊà ∑§ËÁ¡∞–

Find the number of electrons, protons and neutron possessed by the alpha particles ( )42 He++

used in the gold leaf experiment.

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3 HIV-AIDS ‚ ¬ËÁ«∏à √ÿÁÄà ¿UÊ≈U ‚¥∑˝§◊áÊÊ¥ ∑§Ê ◊È∑§Ê’‹Ê ÷Ë Ÿ„Ë¥ ∑§⁄U ‚∑§ÃÊ „Ò– ÄÿÊ¥?

A person suffering from HIV-AIDS cannot fight even minor infections. Why ?

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4 „◊¥ ◊ÄπË ∑§ Á÷ŸÁ÷ŸÊŸ ∑§Ë äflÁŸ ‚ÈŸÊ߸ Œ ¡ÊÃË „Ò ¬⁄UãÃÈ ‚⁄U‹ ‹Ê‹∑§ ∑§ ŒÊ‹Ÿ ∑§⁄UŸ ∑§Ë äflÁŸ ‚ÈŸÊ߸ ÄÿÊ¥ Ÿ„Ë¥ ŒÃË „Ò?

Why do we hear the sound produced by the humming bees but the sound of vibratons of a simple pendulum is not heard ?

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5 150 N dk cy 10 cm2 {ks=kiQy ds i"B ij yxrk gSA iz.kksn rFkk nkc ifjdfyr dhft,A A force of 150 N acts on a surface of area 10 cm2. Calculate thrust and pressure.

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6 ’„Ȭ⁄U◊ÊáÊÈ∑§ •ÊÿŸ ∑§Ë ¬Á⁄U÷Ê·Ê Á‹Áπ∞– ‚ÍòÊ ‚Á„à ŒÊ ©ŒÊ„⁄UáÊ Á‹Áπ∞– Define polyatomic ion. Write two examples along with their formulae.

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7 ∞∑§ ¬⁄U◊ÊáÊÈ ◊¥ 3 ¬˝Ê≈UÊÚŸ, 3 ß‹Ä≈˛UÊÚŸ ÃÕÊ 4 ãÿÍ≈˛UÊÚŸ „Ò¥– ß‚∑§Ë ¬⁄U◊ÊáÊÈ ‚¥ïÿÊ, Œ√ÿ◊ÊŸ ‚¥ïÿÊ ÃÕÊ ‚¥ÿÊ¡∑§ÃÊ ôÊÊà ∑§ËÁ¡∞– An atom contains 3 protons, 3 electrons and 4 neutrons. Find its atomic number, mass number and valency ?

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8 (a) Á∑§‚Ë Ãàfl ‘X’ ∑§Ë ‚¥ÿÊ¡∑§ÃÊ 3 „Ò– ‚À»§≈U •ÊÚÿŸ ∑§ ‚ÊÕ ß‚∑§Ê ⁄UÊ‚ÊÿÁŸ∑§ ‚ÍòÊ Á‹Áπ∞–

(b) ∑§Ê߸ Ãàfl ‘E’ ŒÊ ‚¥ÿÊ¡∑§ÃÊ∞¥ 2 ÃÕÊ 4 Œ‡ÊʸÃÊ „Ò– ‘E’ ∑§ ŒÊŸÊ¥ •ÊÚÄ‚Êß«UÊ¥ ∑§Ê ⁄UÊ‚ÊÿÁŸ∑§ ‚ÍòÊ Á‹Áπ∞–

(c) Á∑§‚Ë Ãàfl ‘Y’ ∑§Ë ‚¥ÿÊ¡∑§ÃÊ ∞∑§ „Ò– ∑§Ê’ʸŸ≈U •ÊÚÿŸ ∑§ ‚ÊÕ ß‚∑§Ê ⁄UÊ‚ÊÿÁŸ∑§ ‚ÍòÊ Á‹Áπ∞–

(a) An element ‘X’ has valency 3. Write its chemical formulae with sulphate ions. (b) An element ‘E’ shows two valencies 2 and 4. Write the chemical formulae of the two

oxides of ‘E’. (c) An element ‘Y’ has valency one. Write its formula with carbonate ion.

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9 fuEufyf[kr oxks± esa mifLFkr mUur y{k.k rFkk izFke ckj fn[kk;h nsus okys y{k.kksa (tSo fodkl ds

vuqlkj) dk mYys[k dhft, —

(i) VsfjMksiQkbVk (ii) ftEuksLieZ (iii) ,aft;ksLieZ State the advanced features present in and seen for the first time (according to evolution) in the following groups : (i) pteridophyta (ii) gymnosperm (iii) angiosperm

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10 ‚¥∑§Ê◊∑§ ⁄Uʪʥ ∑§Ê »Ò§‹Ÿ ‚ ⁄UÊ∑§Ÿ ∑§ Á‹ÿ •Ê¬ •¬Ÿ ÁfllÊ‹ÿ ◊¥ ∑§ÊÒŸ-∑§ÊÒŸ ‚Ë ‚ÊflœÁŸÿÊ° ‹ ‚∑§Ã „Ò¥? What precautions can you take in your school to reduce the incidence of infectious diseases ?

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11 ŸËø ÁŒ∞ ª∞ •Á÷‹ˇÊáÊÊ¥ mÊ⁄UÊ ¡ËflÊ¥ ∑§ $»§Êß‹◊Ê¥ ∑§Ë ¬„øÊŸ ∑§ËÁ¡∞ ÃÕÊ ¬˝àÿ∑§ ∑§Ê ∞∑§ ©ŒÊ„⁄UáÊ ŒËÁ¡∞ó

(a) ¡¥ÃÈ•Ê¥ ◊¥ Ám¬Ê‡fl ‚◊Á◊ÁÃ, ÁòÊ∑§Ê⁄U∑§, ’‹ŸÊ∑§Ê⁄U, ¬⁄U¡ËflË ÃÕÊ Œ„ªÈ„Ê ∑ͧ≈U‚Ë‹Ê◊ „ÊÃË „Ò–

(b) Œ„ªÈ„Ê ⁄UÄà ‚ ÷⁄UË „ÊÃË „Ò, ÃÕÊ ßŸ ¡¥ãÃÈ•Ê¥ ◊¥ ¡È«∏ „È∞ ¬Ò⁄U ¬Ê∞ ¡Êà „Ò¥–

(c) ßã„¥ ø¬≈U ∑ΧÁ◊ ∑§„Ê ¡ÊÃÊ „Ò ÃÕÊ ÿ Sfl¿¥UŒ ¡¥ÃÈ ÿÊ ¬⁄U¡ËflË ∑§„‹Êà „Ò¥–

Identify the phylum of animals by the given characteristics and give an example of each -

(a) The animals are bilaterally symmetrical, triploblastic, cylindrical, parasitic and has

a pseudocoelom.

(b) The coelomic cavity is blood filled and the animals have jointed legs.

(c) The animals are called the flat worms and are either free living or parasitic.

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12 (a) Œks ∑§Ê⁄U∑§ Á‹Áπ∞ Á¡Ÿ ¬⁄U Á∑§ÿ ªÿ ∑§Êÿ¸ ∑§Ê ¬Á⁄U◊ÊáÊ ÁŸ÷¸⁄U ∑§⁄UÃÊ „Ò– ∞∑§ ©ŒÊ„⁄UáÊ ŒËÁ¡∞ ¡„Ê° ’‹ ‹ªÃÊ „Ò ¬⁄UãÃÈ Á∑§ÿÊ ªÿÊ ∑§Êÿ ‡ÊÍãÿ „Ò–

(b) tc fdlh lkeku dks jLlh ds }kjk rhljs ry ls Hkwfe ry rd yk;k x;k rks dqN dk;Z fd;k

x;kA D;k ;g fd;k x;k dk;Z /ukRed gS vFkok ½.kkRed\ vius mÙkj dh iqf"V ds fy,

mi;qDr dkj.k fyf[k,A (a) Mention two factors on which amount of work done depends. Give one example

where force acts but no work is done. (b) When a luggage is lowered to ground floor with the help of rope from third floor some

work is done. Is this work done positive or negative ? Give suitable reason to support your answer.

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13 3 cm ÷È¡Ê ∑§ Á∑§‚Ë ÉÊŸ ∑§Ê ¬„‹ ¡‹ ◊¥ ÃÕÊ Á»§⁄U ‚¥ÃÎ# ‹fláÊËÿ Áfl‹ÿŸ ◊¥ «ÈU’ÊÿÊ ¡ÊÃÊ „Ò– Á∑§‚ ÁSÕÁà ◊¥

•Áœ∑§ ©àå‹ÊflŸ ’‹ ‹ªªÊ ? ÿÁŒ ÉÊŸ ∑§Ë ¬˝àÿ∑§ ÷È¡Ê ∑§Ê 2 cm ∑§◊ ∑§⁄U ÁŒÿÊ ¡Ê∞ •ÊÒ⁄U Ã’ ¡‹ ◊¥ «ÈU’ÊÿÊ ¡Ê∞

ÃÊ ¬ÊŸË mÊ⁄UÊ ‹ªŸ flÊ‹ ©àå‹ÊflŸ ’‹ ¬⁄U ¬˝Õ◊ ÁSÕÁà ∑§Ë ÃÈ‹ŸÊ ◊¥ ÄÿÊ ¬˝÷Êfl

¬«∏ªÊ ? ¬˝àÿ∑§ ÁSÕÁà ∑§ Á‹∞ ∑§Ê⁄UáÊ S¬C ∑§ËÁ¡∞–

A cube of side 3 cm is immersed in water and then in saturated salt solution. In which case

will it experience a greater buoyant force. If each side of the cube is reduced to 2 cm and then

immersed in water, what will be the effect on the buoyant force experienced by the cube as

compared to the first case for water. Give reason for each case.

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14 (a) ml HkkSfrd jkf'k dk uke fyf[k, ftldk ek=kd gV~Zt (hertz) gSA

(b) bldh ifjHkk"kk fyf[k,A

(c) ml HkkSfrd jkf'k dk uke fyf[k, ftldks fdlh ekè;e esa ewy fLFkfr ds

nksuksa vksj vfèkdre fo{kksHk ds ifjek.k }kjk le>k;k tkrk gSA •ŸÈŒÒäÿ¸ Ã⁄¥Uª ∑§ Á‹∞ ©Ÿ ÁSÕÁÃÿÊ¥ ∑§Ê ŸÊ◊ Á‹Áπÿ ¡„Ê° ß‚ ⁄UÊÁ‡Ê ∑§Ê ¬Á⁄U◊ÊáÊ •Áœ∑§Ã◊ „ÊÃÊ „Ò–

(a) Name the physical quantity whose unit is hertz. (b) Defin it. (c) Name the physical quantity which is described by the magnitude of the maximum

disturbance in the medium on either side of the mean value. Name the positions in a longitudinal wave where the magnitude of this quantity is maximum.

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15 fuEu izdj.kksa esa ÅtkZ :ikUrj.k ds izdkj igpkudj fyf[k,µ

(a) tc Å"eh; 'kfDr la;a=k esa dks;ys dk ngu gksrk gSA

(b) tc ,d 'kq"d lsy VkWpZ tykus ds fy, folftZr gksrk gSA

(c) ty fo|qr 'kfDr la;a=k esaA Identify and state the type of transformation of energy in the following cases : (a) when coal is burnt in a thermal power plant (b) when a dry cell discharges to light a torch (c) in a hydroelectric power plant.

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16 ⁄Uß •¬Ÿ ŒÊŒÊ¡Ë ∑§ ÉÊ⁄U ªÿÊ fl„Ê° ‚◊ˬ „Ë ∞∑§ ¤ÊË‹ ÕË– ©‚Ÿ ŒπÊ Á∑§ „flÊ ∑§Ë •¬ˇÊÊ ¤ÊË‹ ∑§ ¬ÊŸË ◊¥ ø‹ŸÊ

ÿÊ ¬Ò⁄U ©∆UÊŸÊ ’«∏Ê •Ê⁄UÊ◊ŒÊÿ∑§ ÕÊ– fl„ ß‚∑§Ê ∑§Ê⁄UáÊ Ÿ ‚◊¤Ê ‚∑§Ê– ©‚∑§ ’«∏ ÷Ê߸ ‡ÿÊ◊ Ÿ ’ÃÊÿÊ Á∑§ ÿ„

©àå‹Êfl∑§ÃÊ ∑§ ∑§Ê⁄UáÊ „Ò–

(i) ©àå‹ÊflŸ ’‹ ÄÿÊ „ÊÃÊ „Ò? ∑§ÊÒŸ ‚ ∑§Ê⁄UáÊ ß‚ ¬÷ÊÁflà ∑§⁄Uà „Ò¥?

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(ii) ⁄Uß mÊ⁄UÊ ∑§ÊÒŸ ‚ ªÈáÊ Œ‡ÊÊ∞ ª∞? ÃÕÊ ‡ÿÊ◊ mÊ⁄UÊ ∑§ÊÒŸ ‚ ◊ÍÀÿ ¬˝ŒÁ‡Ê¸Ã „Êà „Ò¥?

Ratan went to his grandparent’s house which had a lake nearby. He observed that it was easy

and enjoyable to move and raise his legs inside water of lake than when in air. He could not

understand the cause. His elder brother shyam told him that it was due to buoyancy.

(i) What is buoyant force? What are the factors affecting it ?

(ii) What quality was shown by Ratan ? What quality was depicted by Shyam ?

17 (a) ‚ïÊSÕÊÁŸ∑§Ê¥ ∑§Ë ¬Á⁄U÷Ê·Ê Á‹Áπ∞– ÁøÁ∑§à‚Ê ∑§ ˇÊòÊ ◊¥ ‚◊SÕÊÁŸ∑§Ê¥ ∑§ ∑§Êß ŒÊ •ŸÈ¬˝ÿʪ Á‹Áπ∞–

(b) Ä‹Ê⁄UËŸ ∑§Ê ‚ʬˇÊ ¬⁄U◊ÊáÊÈ Œ√ÿ◊ÊŸ ‚fl¸ŒÊ 35.5.u ÄÿÊ¥ „ÊÃÊ „Ò, √ÿÊïÿÊ ∑§ËÁ¡∞– (a) Define isotopes. Give any two uses of isotopes in the field of medicine. (b) Explain why chlorine always has relative atomic mass of about 35.5. u.

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18 ø¬≈U ∑ΧÁ◊, ªÊ‹ ∑ΧÁ◊ ÃÕÊ πá«UÿÈÄà ∑ΧÁ◊ ◊¥ ¬˝àÿ∑§ ∑§Ê ∞∑§-∞∑§ ©ŒÊ„⁄UáÊ Á‹πà „È∞ Áfl÷ŒŸ ∑§ËÁ¡∞–

Differentiate between flatworm, round worm and segmented worms, giving an example of each.

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19 ““◊ÊÃÊ-Á¬ÃÊ ∑§Ê Á‡ÊÁˇÊà ∑§⁄UŸ ‚ ⁄Uʪʥ ∑§ ¬‚¥ªÊ¥ ∑§Ê ∑§◊ ∑§⁄UŸ ◊¥ ’„Èà ‚„ÊÿÃÊ „Ê ‚∑§ÃË „Ò–”” ¬Ê°ø ∑§Ê⁄UáÊÊ¥ ‚Á„à ߂ ∑§ÕŸ ∑§Ê ‚àÿÊÁ¬Ã ∑§ËÁ¡ÿ–

“Educating parents would help a lot in reducing the incidences of diseases in children”. Justify the statement with five reasons.

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20 fuEu dks xzk»§ ij izn£'kr dhft,µ

(a) nks èofu rjaxsa ftuds vk;ke rFkk rjaxnSè;Z fHkUu gSaA

(b) ,d iuMqCch lksukj Lian mRl£tr djrh gS] tks ikuh ds vanj [kM+h ,d pV~Vku ls Vdjkdj 1.2

lsd.M ds i'pkr~ okil ykSVrk gSA ;fn [kkjs ikuh esa èofu dh pky 1530 m/s gks rks iuMqCch

ls pV~Vku dh nwjh Kkr dhft, A (c) ‚ÊŸÊ⁄U ∑§Ê ¬Í⁄UÊ ŸÊ◊ Á‹Áπ∞– Represent on a graph : (a) Two sound waves having different amplitudes and also different wavelengths. (b) A submarine emits a sonar pulse, which returns from an underwater cliff in 1.2 sec. If

the speed of sound in sea water is 1530 m/s how far is the cliff from the submarine. (c) Write full form of SONAR.

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21 (a) ©àå‹Êfl∑§ÃÊ ÄÿÊ „ÊÃË „Ò ? 5

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(b) Á∑§‚Ë flSÃÈ ∑§Ê Œ˝fl ∑§Ë ‚Ä ¬⁄U ⁄UπŸ ¬⁄U fl„ «ÍU’ÃË •ÕflÊ ÃÒ⁄UÃË ÄÿÊ¥ „Ò ?

(c) ÃÒ⁄UÊ∑§Ê¥ ∑§Ê „flÊ ‚ ÷⁄UË ⁄U’«∏ ∑§Ë ¡Ò∑§≈UU ÿÊ ≈˜ÿÍ’ ÄÿÊ¥ ŒË ¡ÊÃË „Ò¥ ?

(a) What is buoyancy ?

(b) Why does an object float or sink when placed on the surface of a liquid ?

(c) Why are swimmers provided with inflated rubber jackets or tubes ?

÷ʪ-’ (◊ÈQ ¬Ê∆ ) /SECTION – B (OTBA)

(* Please ensure that open text of the given theme is supplied with this question paper.)

(*∑§Î¬ÿÊ ‚ÈÁŸÁ‡øà ∑§⁄U ‹¥ Á∑§ ◊ÈQ ¬Ê∆ Áfl·ÿ ∑§Ë ¬Ê∆K‚Ê◊ªË ß‚ ¬‡Ÿ¬òÊ ∑§ ‚ÊÕ ‚¥‹ÇŸ „Ò)

Theme : Clean India – We mean it !

fo"k; % Sflë¿ ÷Ê⁄à - „◊ ß‚ ∑ ⁄∑ ⁄„¢ª !

22 “√ÿÁÄêà SflÊSâÿ ∑§ Á‹∞ ‚Êfl¡ÁŸ∑§ Sflë¿UÃÊ •Êfl‡ÿ∑§ „Ò”– Á≈Uå¬áÊË ∑§ËÁ¡∞–

‘Public cleanliness is important for individual health'. Comment.

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23 ÁfllÊ‹ÿ ∑§ ¿UÊòÊÊ¥ ∑§ Á‹∞ ’ÊÿÊ ªÒ‚ ‚¥ÿ¥òÊ ∑§ •ŸÈ¬˝ÿʪʥ ∑§Ê ©ÀÀÊπ ∑§ËÁ¡∞– ‚¥ÿ¥òÊ ∑§ •fl‡Ê· (S‹⁄UË) ∑§Ê ©¬ÿʪ

Á∑§‚ ¬∑§Ê⁄U Á∑§ÿÊ ¡Ê ‚∑§ÃÊ „Ò?

Mention the applications of the bio-gas plant for school children. How can the slurry be used

?

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24 •Ê¬∑§ ÁfllÊ‹ÿ ◊¥ •¬Á‡Êc≈U ¬˝¥’œŸ ∑§ ∑ȧ¿U •ïÿÊ‚Ê¥ ∑§Ê ∑§ÊÿʸÁãflà ∑§⁄UŸ ∑§Ë ÁflfløŸÊ ∑§ËÁ¡∞–

Discuss some of the waste management practices implemented in your school.

5

÷ʪ- ‚ /Section – C

25 äflÁŸ ∑§ ¬⁄UÊflß ∑§ ÁŸÿ◊Ê¥ ∑§Ë ‚¥¬ÈÁC ∑§Ê ¬˝ÿʪ ∑§⁄Uà ‚◊ÿ ÿÁŒ ¬⁄UÊflÃ∑§ ¬Îc∆U ∑§Ê …UË‹ ™§ŸË ∑§¬«∏ ‚ …U∑§ ÁŒÿÊ ¡Ê∞ ÃÊ ¬Ê߬ B ‚ ‚ÈŸË ¡ÊŸ flÊ‹Ë ¬⁄UÊflÁÃà äflÁŸ „ÊªË —

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(a) •Áœ∑§ ¬˝’‹ (b) ©ÃŸË „Ë ¬˝’‹ÃÊ ∑§Ë „ÊªË (c) ∑§◊ ¬˝’‹ (d) ‚ÈŸÊ߸ Ÿ„Ë¥ ŒªË While doing an experiment to verify the laws of reflection of sound if the reflecting surface is covered with loose woollen cloth, the reflected sound heard through pipe B will: (a) be more loud (b) be of same loudness (c) be less loud (d) not be heard

26 ∞∑§ ¿UÊòÊ ‚◊ÈŒ Ã≈U ¬⁄U ≈U„‹Ÿ ∑§ Á‹∞ ¡ÊŸÊ øÊ„ÃÊ „Ò, ©‚ ¬„ŸŸ ∑§ Á‹∞ Á∑§‚ ¬˝∑§Ê⁄U ∑§ ¡ÍÃÊ¥ ∑§Ê ¬ÊÕÁ◊∑§ÃÊ ŒŸË øÊÁ„∞ — (a) S∑§≈U (¡ÍÃ) (b) ŒÊÒ«∏Ÿ ∑§ Á‹∞ ¡Íà (c) ∑§Ê°≈UŒÊ⁄U ¡Íà (d) ™°§øË „Ë‹ ∑§ ¡Íà If a student wants to go for a beach walk, what kind of shoes he/she should prefer to wear : (a) Skates ( shoes ) (b) Shoes used for running (c) Spike shoes (d) High heels shoes

1

27 fl„ ÷ÊÒÁÃ∑§ ⁄UÊÁ‡Ê ¡Ê ÁS‹¥∑§Ë mÊ⁄UÊ ©à¬ÛÊ Ã⁄¥Uª ◊¥ ŒÊ‹Ÿ ∑§⁄UÃË „Ò fl„ „Ò —

(a) Œ˝√ÿ◊ÊŸ (b) ™§¡Ê

(c) •ÊÿÊ◊ (d) •ÊflÎÁûÊ The physical quantity which oscillates in a wave formed by slinky is : (a) mass (b) energy (c) amplitude (d) frequency

1

28 ¬Êߟ‚ ∑§Ë ¬ÁàÃÿÊ° „ÊÃË „Ò¥ -

(a) ‚Èß ¡Ò‚Ë (b) ‡ÊÀ∑§ ¡Ò‚Ë

(c) ø¬≈UË (d) øÊÒ«∏Ë In pinus leaves are (a) Needle like (b) Scale like (c) Flat (d) Broad shaped

1

29 Œ˝√ÿ◊ÊŸ ‚¥⁄UˇÊáÊ ∑§ ÁŸÿ◊ ‚ ‚¥’h Á‚Àfl⁄U ŸÊß≈˛U≈U ∑§Ê Œ˝√ÿ◊ÊŸ ¡Ê 11.70g ‚ÊÁ«Uÿ◊ Ä‹Ê⁄UÊß«U ‚ •Á÷Á∑§ÿÊ ∑§⁄U∑§

28.70g Á‚Àfl⁄U Ä‹Ê⁄UÊß«U ÃÕÊ 17g ‚ÊÁ«Uÿ◊ ŸÊß≈˛U≈U ©à¬ãŸ ∑§⁄UªÊ fl„ „Ò—ó

(a) 17g

(b) 34g

(c) 45.70g

(d) 17.0g

The mass of silver nitrate which will react with 11.70g of sodium chloride to produce 28.70g of

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silver chloride and 17g of sodium nitrate, in accordance with law of conservation of mass is:

(a) 17g

(b) 34g

(c) 45.70g

(d) 17.0g

30 ¡’ 30g ∑§ÊÚ¬⁄U ‚À»§≈U Áfl‹ÿŸ 30g ‚ÊÁ«Uÿ◊ „Êß«UÊÚÄ‚Êß«U Áfl‹ÿŸ ‚ •Á÷Á∑§ÿÊ ∑§⁄UÃÊ „Ò ÃÊ 20g ∑§ÊÚ¬⁄

„Êß«˛UÊÚÄ‚Êß«U Áfl‹ÿŸ ÃÕÊ 40g ‚ÊÁ«Uÿ◊ ‚À»§≈U •flˇÊ¬ ¬˝Ê# „ÊÃÊ „Ò– ÿ„ ∑§ÕŸ Á¡‚ ÁŸÿ◊ ∑§ •ŸÈ‚Ê⁄U „Ò fl„

„Ò—ó

(a) ÁSÕ⁄U •ŸÈ¬Êà ∑§Ê–

(b) ⁄UÊ‚ÊÿÁŸ∑§ ‚¥ÿÊ¡Ÿ ∑§Ê–

(c) Œ˝√ÿ◊ÊŸ ‚¥⁄UˇÊáÊ ∑§Ê–

(d) ™§¬⁄U ÁŒ∞ ª∞ ◊¥ ‚ ∑§Ê߸ Ÿ„Ë¥–

When 30g of copper sulphate solution reacts with 30g of sodium hydroxide solution, 20g of

copper hydroxide solution and 40g of sodium sulphate precipitate was formed. This

statement is in accordance with:

(a) The law of constant proportions

(b) The law of chemical combinations

(c) The law of conservation of mass

(d) None of the above

1

31 fuEufyf[kr esa ls dkSu&lk vfHky{k.k f}chti=kh ikS/ksa dk ugha gS —

(a) iapHkkxh iwQy

(b) ifÙk;ksa esa tkfydkor~ f'kjkfoU;kl

(c) js'ksnkj tM+ra=k

(d) nks chti=k mifLFkr

Which of the following is not a feature of dicotyledonous plants : (a) pentamerous flowers

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(b) leaves with reticulate venation (c) fibrous root system (d) two cotyledons

32 fuEufyf[kr esa dkSu&lk vfHky{k.k ,dchti=kh ikni dk gS —

(a) ifÙk;ksa esa tkfydkor~ f'kjkfoU;kl

(b) f=kr;h iwQy

(c) ewlyk tM+

(d) iapHkkxh iwQy

Which of the following is a feature of monocotyledonous plant :

(a) reticulate venation in leaf

(b) trimerous flowers

(c) tap root

(d) pentamerous flowers

1

33 Á∑§‚ Áfl∑§Ê‚Ë •flSÕÊ ◊¥ ◊ë¿U⁄U ÷Ê¡Ÿ ª„áÊ Ÿ„Ë¥ ∑§⁄UÃÊ ?

(a) ‹Êflʸ •flSÕÊ (b) åÿͬÊU •flSÕÊ (c) •¥«U •√ÊSÕÊ (d) ŒÊŸÊ¥ (b) ÃÕÊ (c)

During which developmental stage the mosquito does not feed ? (a) larva stage (b) pupa stage (c) egg stage (d) both (b) and (c)

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34 (i) ÿÁŒ „◊ Á∑§‚Ë flSÃÈ ∑§Ê ¡‹ ◊¥ ¬Íáʸ M§¬ ‚ «ÈU’Ê∑§⁄U ©‚∑§Ê •Êÿß ôÊÊà ∑§⁄UŸÊ øÊ„Ã „Ò¥ ÃÊ ∆UÊ‚ Á∑§‚ ¬˝∑§Ê⁄U ∑§Ê „ÊŸÊ øÊÁ„∞?

(ii) ÿÁŒ ∑§Ê߸ flSÃÈ Œ˝fl ∑§Ë ‚Ä ¬⁄U ÃÒ⁄UÃË „Ò ÃÊ ©‚∑§ mÊ⁄UÊ ÁflSÕÊÁ¬Ã Œ˝fl ∑§Ê ÷Ê⁄U, flSÃÈ ∑§ ÷Ê⁄U ∑§Ë ÃÈ‹ŸÊ ◊¥ Á∑§ÃŸÊ „ʪÊ?

(i) If we want to determine the volume of a solid by immersing it in water, then what kind of solid should we take ?

(ii) If a body floats on the surface of a liquid, then how much is the weight of the liquid displaced as compared to weight of body ?

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35 Œ˝fl ◊¥ «ÈU’ÊŸ ¬⁄U ∆UÊ‚ ∑§ ÷Ê⁄U ◊¥ •ÊÿË ∑§◊Ë ∑§Ê ôÊÊà ∑§⁄UŸ ∑§ ¬˝ÿʪ ◊¥, ∆UÊ‚ ¬⁄U ‹ªŸ flÊ‹Ê ’‹ Á∑§Ÿ ∑§Ê⁄U∑§Ê¥ ¬⁄U 2

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ÁŸ÷¸⁄U ∑§⁄UÃÊ „Ò ?

In an experiment to determine the loss weight of an object when immersed in a liquid, on

what factors the force acting on an object depends ?

36 ŸËø ÁŒ∞ ª∞ ÁøòÊ ◊¥ ¡¥ÃÈ ∑§Ê ¬„øÊÁŸÿ ÃÕÊ ©‚∑§Ê ∞∑§ ÁflÁ‡Êc≈U ‹ˇÊáÊ ∞fl¥ ∞∑§ •ŸÈ∑ͧ‹Ÿ ‹ˇÊáÊ Á‹Áπÿ–

Identify the given organism in the picture given below and write its one specific feature and one adaptive feature

2

-o0o0o0o-

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Marking Scheme

Science (Class–IX)

General Instructions:

1. The Marking Scheme provides general guidelines to reduce subjectivity and maintain uniformity.

The answers given in the marking scheme are the best suggested answers.

2. Marking be done as per the instructions provided in the marking scheme. (It should not be done

according to one’s own interpretation or any other consideration).

3. Alternative methods be accepted. Proportional marks be awarded.

4. If a question is attempted twice and the candidate has not crossed any answer, only first attempt be

evaluated and ‘EXTRA’ be written with the second attempt. 5. In case where no answers are given or answers are found wrong in this Marking Scheme,

correct answers may be found and used for valuation purpose.

Öæ»-¥ / SECTION-A

1 When a chemical reaction takes place some of the mass may escape out in the form of gas or vapours.

1

2 Electrons, protons and neutron possessed by the particles used in the gold leaf experiment, 42 He .

Enil, P2, N2 (½ mark to be deducted for one error)

1

3 In HIV infection, the virus goes to the immune system and damages its function.

1

4 Humming bees produce waves of frequency greater than 20 Hz which are audible to us. On the other hand, frequency of vibration of a simple pendulum is less than 20 Hz which is not

audible to us.

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5 Area = 10 square cm = 10/10000 = 103 m3 Thrust = 150 N

Pressure = thrust/area

Pressure = 150 N/103 = 150 × 1000 = 150000 pascal

2

6 A group of atoms carrying a charge is called a polyatomic ion.

e.g. 4NH Ammonium Ion ; 23CO Carbonate Ion

3

7 Atomic number3, mass number347, Valency1

3

8 (a) X2(SO4)3

(b) EO, E2O4(EO2)

(c) Y2CO3

3

9 (i) Pteridophyta—vancular bundles/specialised tissue for conduction of water and other substances/body differentiated into stem, root and leaves

(ii) Gymnosperm—bear seeds (iii) Angiosperm—seeds enclosed in fruits/development of flowers/fruits

3

10 (a) Prevent water logging to avoid mosquito breeding

(b) Clean hygienic surroundings (c) Provision of safe drinking water (d) Consuming healthy food (e) Periodic cleaning of toilets and use of disinfectants (f) Wearing of full sleeve shirt and full pants to avoid mosquito bite

(g) Infected children should take leave

3

11 (a) Nematoda – eg. Ascaris 3

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(b) Arthropoda – eg. Prawn

(c) Platyhelminthes – eg. Planaria

(e.g. or any other)

12 (a) (i) Magnitude of force that acts on an object (ii) Distance moved by object Trying to push a heavy box (b) Work done is negative

As the force is acting vertically up and displacement is in downward direction.

3

13 Salt solution. Volume decreases, Buoyant force decreases.

3

14 (a) Frequency (b) No. of vibration in one second.

(c) amplitude. Compression and rarefaction

3

15 (a) chemical energy of fuel to electrical energy (b) chemical energy to light energy

(c) P.E. and K.E. of water to electrical energy

3

16 (i) Upward force acting on an object immersed in a fluid. Volume of object; density of

fluid.

(ii) Observant, inquisitive. Knowledgeable (any other)

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17 (a) Isotopes are defined as the atoms of the same element, having the same atomic number but different mass numbers. An isotope of cobalt is used in the treatment of cancer and an isotope of iodine is used in the treatment of goiter.

(b) Chlorine occurs in nature in two isotopic forms, with masses 35 u and 37 u in the ratio

of 3:1. The mass of an atom of any natural element is taken as the average mass of all the

naturally occurring atoms of that element. The average atomic mass of chlorine atom, on the basis of above data, will be = 35x ¾

+ 37x ¼ = 35.5

5

18 Flat worms Round worms Segmented worms

- Phylum Platyhelminthes

Nematoda Annelida

- Body structure

Dorsiventrally flattened

Cylindrical/Round in cross section

Segments present from head to tail

- Body cavity Absent Pseudocoelom Coelom present

- Level of

organisation

Organ level not

well differentiated

Organ level Organ system

level

- Examples tapeworm/ liver fluke

Ascasis/Wuchereria

Nereis/leech/ Earthworm

5

19 (1) Educated parents understand the importance of healthy and balanced diet for their children which will prevent nutritional deficiency disorders and also help in proper functioning of immune system.

(2) They know about modes of spread of diseases so, will maintain hygienic conditions. (3) Parents will provide only safe uncontaminated water to avoid waterborne diseases

(4) Educated parents can provide symptomatic treatment first and then go for further doctor’s consultation to kill the cause of the disease.

(5) Educated parents can inculcate a sense of social and moral responsibility in their children to maintain clean environment to prevent spread of infections

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20

(a)Am

plitu

de ®

time ®(a)

Am

plitu

de ®

time ®

(b) t = 1.2 sec. v = 1530 m/sec.

s = ? Distance traveled by the ultrasound = 2d. 2d = v × t

2d = 1530 1.2

d = 1530 1.2

2 = 918 m

(c) Sound Navigation and Ranging

5

21 (a) Definition

(b) Relative density of object and fluid

(c) Density of air in tube < Density of water. Saves from drawing

5

Öæ»-Õ (×éQ ÂæÆ ) /SECTION – B (OTBA)

(* Please ensure that open text of the given theme is supplied with this question paper.)

(*·¤ ëÂØæ â é çÙçà¿Ì ·¤Ú U Üð ´ ç·¤ ×éQ ÂæÆ çßáØ ·¤è ÂæÆKâæ×» ý è §â Âý àÙÂ˜æ ·ð ¤ âæÍ â ´Ü‚Ù ã ñ)

Theme : Clean India – We mean it !

Sß‘À ÖæÚÌ - ã× §âð · Ú·ð Úãð¢»ð !

22 Good maintenance of public toilets, no stagnant water will not allow mosquitoes and germs to

breed as a result no communicable diseases.

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23 It is used as disposal of bio waste which was the remains of mid-day meal and the lunch brought by children. a nearby hotel, run by 'kutumbashree' can also use this for its waste disposal. Slurry is used as manure for the school garden.

3

24 Comport pit in the background the exports on.

5

Öæ»- â /Section – C

25 (d) 0

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26 (b) Running shoes

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27 (b)

1

28 (a)

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29 (b) 34g

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30 (c) The law of conservation of mass

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31 (c)

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32 (b)

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33 (d) both (b) and (c)

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34 (i) The solid should be heavier than water and insoluble in it. (ii) Equal to the weight of the body.

2

35 The weight of a body acting downwards, upthrust on the body due to liquid acting vertically

upward.

2

36 Picture is - Cockroach. Specific feature - Jointed legs, compound eye. Adaptive feature - Omnivorous, body divided into head, thorax and abdomen. (any one of each)

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