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CBSE Class X 2007 : SCIENCE & TECHNOLOGY PRACTICAL SKILLS [Set 2]

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CBSE 10
Kendriya Vidyalaya (KV), Kamla Nehru Nagar, Ghaziabad

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Test Booklet Number Series RKM Test Booklet Code (FOR BLIND CANDIDATES ONLY) ijh{kk iqfLrdk ladsr This booklet contains 24 pages. dsoy us=kghu ijh{kkfFk;ksa ds fy, C bl iqfLrdk esa 24 i`"B gSaA PRACTICAL SKILLS IN SCIENCE AND TECHNOLOGY foKku ,oa izkS|ksfxdh esa iz;ksxkRed dkS'ky Time allowed : 1 hours fu/kkZfjr le; % 1 TEST BOOKLET ?k.Vs General Instructions ijh{kk iqfLrdk Maximum Marks : 20 vf/kdre vad % 20 lkekU; funsZ'k % lkekU; 1. Attempt all questions. lHkh iz'u vfuok;Z gSaA 2. There are 30 multiple choice questions in total. Only one of the options in every question is correct. bl iz'u i=k esa dqy 30 cgqfodYih iz'u gSaA izR;sd iz'u esa dsoy ,d gh fodYi lgh gSA 3. The question paper consists of two sections - Section A and Section B. Each of the 20 questions in Section A carries half mark and each of the 10 questions in Section B carries one mark. bl iz'u i=k ds nks [k.M gSa & [k.M d rFkk [k.M [kA [k.M d ds lHkh 20 iz'u vk/ks vad ds gSa rFkk [k.M [k ds lHkh 10 iz'u ,d vad ds gSaA 4. 15 minutes additional time will be given to you to read the questions. i'u i<+us ds fy, vkidks 15 feuV dk vfrfj le; fn;k tk,xkA 5. The Answer Sheet is inside this Test Booklet. When you are directed to open the Test Booklet, take out the Answer Sheet and fill in the particulars on SIDE-2 carefully with blue/black ball point pen only. In no case, pencil is to be used. Read General Instructions for Candidates on SIDE-1 carefully. m kj i=k bl ijh{kk iqfLrdk ds vUnj j[kk gSA tc vkidks ijh{kk iqfLrdk [kksyus dks dgk tk,] rks m kj i=k fudky dj i` " B&2 ij dsoy uhys@dkys ckWy ikWbaV isu ls fooj.k HkjsaA fdlh Hkh fLFkfr esa isafly dk mi;ksx u djsaA i`"B&1 ij fyf[kr ^^ijh{kkfFkZ;ksa ds fy, lkekU; funsZ'k** /;kuiwoZd i<+saA 6. Use Blue/Black Ball Point Pen only for writing particulars on this page/writing particulars and marking responses on SIDE-2 of the Answer Sheet. bl i`"B ij ,oa m kj i=k ds i`"B&2 ij fooj.k vafdr djus ,oa fu'kku yxkus ds fy, dsoy uhys@dkys ckWy ikWbaV isu dk iz;ksx djsaA 7. On completion of the test, the candidate must hand over the Answer Sheet to the Invigilator in the Room/Hall. The candidates are allowed to take away this Test Booklet with them. ijh{kk lEi gksus ij] ijh{kkFkhZ d{k@gkWy NksM+us ls iwoZ m kj i=k d{k fujh{kd dks vo'; lkSai nsaA ijh{kkFkhZ vius lkFk bl ijh{kk iqfLrdk dks ys tk ldrs gSaA 8. The CODE for this Test Booklet is C. Make sure that the CODE printed on SIDE-2 of the Answer Sheet is the same as that on this booklet. In case of discrepancy, the candidate should immediately report the matter to the Invigilator for replacement of both the Test Booklet and the Answer Sheet. bl ijh{kk iqfLrdk dk ladsr C gSA ;g lqfuf'pr dj ysa fd bl iqfLrdk dk ladsr] m kj i=k ds i` " B&2 ij Nis ladsr ls feyrk gSA vxj ;g fHk gks rks ijh{kkFkhZ nwljh ijh{kk iqfLrdk vkSj m kj i=k ysus ds fy, d{k fujh{kd dks rqjUr voxr djk, A 9. The candidates should ensure that the Answer Sheet is not folded. Do not make any stray marks on the Answer Sheet. Do not write your Roll Number anywhere else except in the specified space in the Test Booklet/Answer Sheet. ijh{kkFkhZ lqfuf'pr djsa fd bl m kj i=k dks eksM+k u tk, ,oa ml ij dksbZ vU; fu'kku u yxk, A ijh{kkFkhZ viuk vuq ekad ijh{kk iqfLrdk@m kj i=k esa fu/kkZfjr LFkku ds vfrfj vU;=k uk fy[ksaA 10. Use of white fluid for correction is not permissible on the Answer Sheet. m kj i=k ij fdlh izdkj ds la'kks/ku gsrq lQsn yqbM ds iz;ksx dh vuqefr ugha gSA u gha Name of the Candidate (in Capitals): _________________________________________________ ijh{kkFkhZ dk uke cM+s v{kjksa esa % Roll Number : vuq ekad in figures vadksa esa _________________________________________________ : in words 'kCnksa esa _________________________________________________ SECTION A [k.M d 1. A student obtained a sharp image of the grill of a window on a screen, using a convex lens. For getting better results, the teacher suggested focussing of a distant tree instead of the grill. In which direction should the lens be moved for this purpose ? (1) Away from the screen (2) Very far away from the screen (3) Behind the screen (4) Towards the screen fdlh fo|kFkhZ us m ky ysal }kjk insZ ij f[kM+dh esa yxh fxzy dk Li"V izfrfcEc izkIr fd;kA vPNs ifj.kke ds fy, f'k{kd us ;g lq>ko fn;k fd mls fxzy ds LFkku ij fdlh nwjLFk o`{k dks Qksdflr djuk pkfg,A bl dk;Z ds fy, ysal dks fdl fn'kk esa foLFkkfir fd;k tkuk pkfg, \ (1) (2) insZ ls vR;f/kd nwj (3) insZ ds ihNs (4) 2. insZ ls nwj insZ dh vksj The image of a distant object is obtained on a screen by using a concave mirror. The focal length of the mirror can be determined by measuring the distance between (1) the object and the mirror (2) the object and the screen (3) the mirror and the screen (4) the mirror and the screen as well as that between the object and the screen 31(P)/C 2 vory niZ.k }kjk fdlh nwjLFk oLrq dk Li"V izfrfcEc insZ ij izkIr fd;k x;kA niZ.k dh Qksdl nwjh Kkr djus ds fy, fuEufyf[kr esa ls fdls ekiuk pkfg, \ (1) (2) oLrq rFkk insZ ds chp dh nwjh (3) niZ.k rFkk insZ ds chp dh nwjh (4) 3. oLrq rFkk niZ.k ds chp dh nwjh niZ.k rFkk insZ ds chp dh nwjh ds lkFk&lkFk oLrq rFkk insZ ds chp dh nwjh Hkh Which one of the following is the best set-up for tracing the path of a ray of light through a rectangular glass slab ? (1) I (2) II (3) III (4) IV 31(P)/C 3 P.T.O. fdlh dk p dh vk;rkdkj flYyh ls xqt+jus okyh izdk'k fdj.k dk iFk vkjsf[kr djus ds fy, fuEufyf[kr esa dkSulh izk;ksfxd O;oLFkk loksZ ke gS \ (1) (2) (3) (4) 4. I II III IV The following circuit diagram shows the experimental set-up for the study, of dependence of current on potential difference. Which two circuit components are connected in series ? (1) Battery and voltmeter (2) (3) Ammeter and voltmeter Ammeter and rheostat (4) Resistor and voltmeter 31(P)/C 4 fuEufyf[kr fo|qr~ ifjiFk vkjs[k esa ^fo|qr~ /kkjk dh foHkokUrj ij fuHkZjrk* dk v/;;u djus ds fy, izk;ksfxd O;oLFkk n'kkZ;h x;h gSA blesa ls dkSuls nks ifjiFk vo;o Js.kh e esa la;ksftr gSa \ (1) (2) ,sehVj rFkk oksYVehVj (3) ,sehVj rFkk /kkjk fu;a=kd (4) 5. cSVjh rFkk oksYVehVj izfrjks/kd rFkk oksYVehVj In a voltmeter, there are 20 divisions between the 0 mark and 0-5 V mark. The leas count of the voltmeter is (1) 0.020 V (2) 0.025 V (3) 0.050 V (4) 0.250 V fdlh oksYVehVj ds iSekus ij 0 fpg~u rFkk 0.5 V fpg~u ds chp 20 Hkkx gSaA oksYVehVj dh vYire eki D;k gS \ (1) 0.020 V (2) 0.025 V (3) 0.050 V (4) 0.250 V 31(P)/C 5 P.T.O. 6. For the circuits shown in figures I and II, the voltmeter reading would be (1) 2 V in circuit I and 0 V in circuit II (2) 0 V in both circuits (3) 2 V in both circuits (4) 0 V in circuit I and 2 V in circuit II fp=k I rFkk II esa n'kkZ, x, fo|qr~ ifjiFkksa ds fy, oksYVehVj ds ikB~;kad D;k gksaxs \ (1) ifjiFk I esa 2 V rFkk ifjiFk II esa 0 V (2) nksuksa ifjiFkksa esa 0 V (3) nksuksa ifjiFkksa esa 2 V (4) ifjiFk I esa 0 V rFkk ifjiFk II esa 2 V 31(P)/C 6 7. Which of the circuit components in the following circuit diagram are connected in parallel ? (1) R1 and R2 only (2) R2 and V only (3) R1 and V only (4) R1, R2 and V fuEufyf[kr fo|qr~ ifjiFk esa dkSu ls ifjiFk vo;o ik'oZ e esa la;ksftr gSa \ (1) (2) dsoy R2 rFkk V (3) dsoy R1 rFkk V (4) 8. dsoy R1 rFkk R2 R1, R2 rFkk V Which one of the following is not required to find the pH of a solution ? (1) pH paper (2) Litmus paper (3) Universal indicator (4) Standard pH value chart 31(P)/C 7 P.T.O. fdlh foy;u dk pH Kkr djus ds fy, fuEufyf[kr esa ls fdldh vko';drk ugha gksrh \ u gha (1) (2) fyVel i=k (3) lkoZf=kd lwpd (4) 9. pH i=k ekud pH eku pkVZ A drop of a liquid sample was put on the pH paper. The colour of the pH paper turned blue. The liquid sample could be that of (1) Lemon juice (2) Hydrochloric acid (3) Sodium bicarbonate solution (4) Ethanoic acid fdlh nzo ds uewus dh ,d cw n pH i=k ij Mkyh xbZA pH i=k dk jax uhyk gks x;kA ;g nzo dk uewuk fdldk gks ldrk gS \ (1) (2) gkbM ksDyksfjd vEy (3) lksfM;e ckbdkcksZusV foy;u (4) 10. uhacw dk jl ,FksukWbd vEy Dilute hydrochloric acid is added to solid sodium carbonate. It is observed that (1) no change takes place (2) a loud sound is produced (3) brisk effervescence occurs (4) the solution turns blue Bksl lksfM;e dkcksZusV esa ruq gkbM ksDyksfjd vEy feyk;k x;kA ;g ik;k x;k fd (1) dksbZ ifjorZu ugha gqvk gS (2) rhoz /ofu mRi gqbZ gS (3) rhoz cqncqnkgV gks jgh gS (4) foy;u uhyk gks x;k gS 31(P)/C 8 11. Which one of the following combinations of substances would you take to prepare sulphur dioxide gas ? (1) Concentrated Sulphuric acid and Zinc (2) Dilute Sulphuric acid and Zinc (3) Dilute Sulphuric acid and Copper (4) Concentrated Sulphuric acid and Copper lYQj MkbvkWDlkbM xSl cukus ds fy, fuEufyf[kr inkFkks ds la;kstuksa esa ls vki fdls ysaxs \ (1) (2) ruq lY ;wfjd vEy rFkk ftad+ (3) ruq lY ;wfjd vEy rFkk dkWij (4) 12. lkanz lY ;wfjd vEy rFkk ftad+ lkanz lY ;wfjd vEy rFkk dkWij A teacher gave two test tubes, one containing water and the other containing sodium hydroxide solution, to the students and asked them to identify the test tube containing sodium hydroxide solution. Which one of the following can be used for correctly identifying the test tube containing sodium hydroxide solution ? (1) Blue litmus (2) Red litmus (3) Sodium carbonate solution (4) Dilute hydrochloric acid ,d f'k{kd us nks ij[kufy;k ] ftuesa ,d esa ty Fkk Hkjk Fkk] fo|kfFkZ;ksa dks nsdj muls ml ij[kuyh dh gkbM kWDlkbM foy;u Hkjk FkkA lksfM;e gkbM kWDlkbM fy, fuEufyf[kr esa ls fdldk mi;ksx fd;k tk (1) uhyk fyVel (2) yky fyVel (3) lksfM;e dkcksZusV foy;u (4) rFkk nwljh esa lksfM;e gkbM kWDlkbM foy;u igpku djus ds fy, dgk ftlesa lksfM;e foy;u Hkjh ij[kuyh dh lgh igpku ds ldrk gS \ ruq gkbM ksDyksfjd vEy 31(P)/C 9 P.T.O. 13. Sodium bicarbonate solution is added to dilute ethanoic acid. It is observed that (1) a gas evolves (2) a solid settles at the bottom (3) the mixture becomes warm (4) the colour of the mixture becomes light yellow lksfM;e ckbdkcksZusV foy;u dks ruq ,FksukWbd vEy esa feykus ij ;g ik;k x;k fd (1) (2) ,d Bksl inkFkZ ryh esa cSB x;k gS (3) feJ.k xje gks x;k gS (4) 14. ,d xSl fudyrh gS feJ.k dk jax gYdk ihyk gks x;k gS The odour of acetic acid resembles that of (1) rose (2) burning plastic (3) vinegar (4) kerosene ,slhfVd vEy dh xa/k fuEufyf[kr esa ls fdldh xa/k ds leku gksrh gS \ (1) xqykc (2) tyrk IykfLVd (3) fljdk (4) fe h dk rsy 31(P)/C 10 15. A student soaked 5 grams of raisins in 25 mL of distilled water in each of two beakers A and B. Beaker A was maintained at 25 C and beaker B at 50 C. After one hour, the student observed that the water absorbed by the raisins was (1) (2) (3) (4) same in case of A and B less in case of A than in B exactly double in A, of that in B exactly four times in A, of that in B fdlh fo|kFkhZ us nks chdjksa A rFkk B esa izR;sd esa 25 mL vklqr ty Hkjdj buesa ik p&ik p xzke fd'kfe'k MqcksbZA chdj A dks 25 C rFkk chdj B dks 50 C ij j[kk x;kA ,d ?k.Vs ds i'pkr~] ml fo|kFkhZ us ;g izs{k.k fd;k fd fd'kfe'kksa }kjk vo'kksf"kr ty dh ek=kk (1) A rFkk B nksuksa esa leku gS (2) (3) B dh rqyuk esa A esa Bhd nqxquh gS (4) 16. A esa B dh rqyuk esa de gS B dh rqyuk esa A esa Bhd pkj xquh gS Given below are the stages of binary fission in amoeba. Which one out of the following would you select as the correct sequence of these stages ? (1) A, B, C, D (2) D, C, A, B (3) B, D, A, C (4) C, A, D, B uhps fp=k esa vehck esa f}&fo[k.Mu ds fofHk pj.k n'kkZ, x, gSaA fuEufyf[kr esa ls fdlesa bu pj.kksa dks lgh e esa j[kk x;k gS \ (1) A, B, C, D (2) D, C, A, B (3) (4) B, D, A, C C, A, D, B 31(P)/C 11 P.T.O. 17. In the following sketch of the stomatal apparatus, the parts I, II, III and IV were labelled differently by four students. The correct labelling, out of the following, is (1) (I) guard cell, (II) stoma, (III) starch granule, (IV) nucleus (2) (I) cytoplasm, (II) nucleus, (III) stoma, (IV) chlorpplast (3) (I) guard cell, (II) starch, (III) nucleus, (IV) stoma (4) (I) cytoplasm, (II) chloroplast, (III) stoma, (IV) nucleu uhps n'kkZ, x, ja/kzh ra=k ds pkj Hkkxksa I, II, III rFkk IV dk pkj fo|kfFkZ;ksa }kjk fHk &fHk ukekadu fd;k x;kA fuEufyf[kr esa ls dkSulk ukekadu lgh gS \ (1) (I) }kj dksf'kdk] (II) ja/kz] (III) LVkpZ d.k] (IV) dsUnzd (2) (I) dksf'kdknzO;] (II) dsUnzd] (III) ja/kz] (IV) gfjryod (3) (I) }kj dksf'kdk] (II) LVkpZ] (III) dsUnzd] (IV) ja/kz (4) (I) dksf'kdknzO;] (II) gfjryod] (III) ja/kz] (IV) dsUnzd 31(P)/C 12 18. A portion of each of four destarched leaves of a plant was covered with paper strips of various kinds. The plant was exposed to sunlight for 5 hours. Thereafter, the strips were removed and the leaves tested for starch in the covered portion. Which one out of the four leaves gave the starch test in the covered portion ? (1) That covered with black paper strip (2) That covered with green paper strip (3) That covered with white paper strip (4) That covered with a transparent paper strip fdlh ikS/ks dh pkj LVkpZjfgr if k;ksa esa ls izR;sd i kh ds fdlh Hkkx dks fofo/k izdkj ds dkxt dh if ;ksa ls vyx&vyx <ddj ikS/ks dks 5 ?k.Vs rd /kwi esa [kqyk NksM+ fn;k x;kA blds i'pkr~ dkxt dh if ;k gVk yh x;ha rFkk izR;sd i kh ds <ds Hkkx dk LVkpZ ijh{k.k fd;k x;kA pkjksa if k;ksa esa ls dkSulh i kh dk <dk gqvk Hkkx LVkpZ ijh{k.k nsxk \ (1) (2) tks gjh i h ls <dh Fkh (3) tks lQsn i h ls <dh Fkh (4) 19. tks dkyh i h ls <dh Fkh tks ikjn'khZ dkxt dh i h ls <dh Fkh The following experiment was set up to show that a gas is given out during respiration. But there was no rise in the level of water. This was because (1) germinating seeds have not been kept under water in the flask (2) water is kept in the beaker instead of lime water (3) the cork on the flask is made of rubber (4) no substance is kept in the flask to absorb the gas given out by the seeds 31(P)/C 13 P.T.O. ;g n'kkZus ds fy, fd 'olu esa dksbZ xSl fudyrh gS] uhps n'kkZ, vuqlkj izk;ksfxd O;oLFkk dh xbZA ijUrq ty ds ry esa dksbZ o`f) ugha gqbZA bldk dkj.k ;g gS fd (1) (2) chdj esa pwus ds ikuh ds LFkku ij ty Hkjk x;k gS (3) ykLd ij yxh MkV jcM+ dh cuh gS (4) 20. vadqfjr chtksa dks ykLd esa ty esa ugha j[kk x;k gS chtksa ls fudyus okyh xSl dks vo'kksf"kr djus ds fy, ykLd esa fdlh inkFkZ dks ugha j[kk x;k gSA A well stained leaf peel preparation when focussed under high power of the microscope would show (1) epidermal cells, stomata, guard cells each with one nucleus and many chloroplasts (2) epidermal cells, stomata, guard cells with many nuclei and one chloroplast each (3) stomata and guard cells without nuclei or chloroplasts (4) stomata but no guard cells or epidermal cells fdlh vPNh vfHkjaftr vf/kpehZ f>Yyh dks lw{en'khZ dh mPp {kerk esa Qksdflr djus ij D;k fn[kkbZ nsuk pkfg, \ (1) vf/kpeZ dksf'kdk, ] ja/kz LVksesVk ] }kjk dksf'kdk, izR;sd ds lkFk ,d dsUnzd rFkk dbZ gfjryod DyksjksIykLV (2) vf/kpeZ dksf'kdk, ] ja/kz] }kjk dksf'kdk, izR;sd ds lkFk dbZ dsUnzd rFkk ,d gfjryod (3) ja/kz rFkk }kjk dksf'kdk, dsUnzd vFkok gfjryod ds fcuk (4) ja/kz] ijUrq dksbZ }kj dksf'kdk, vFkok vf/kpeZ dksf'kdk, ugha 31(P)/C 14 SECTION B [k.M [k 21. A student was asked to demonstrate the following two properties of sulphur dioxide gas : (i) It is heavier than air, and (ii) It is highly soluble in water. Which two of the following four arrangements would the student use to demonstrate these properties ? (1) (2) (3) (4) I and II II and III I and III II and IV fdlh fo|kFkhZ ls lYQj MkbvkWDlkbM xSl ds fuEufyf[kr nks xq.kksa dks funsZf'kr djus ds fy, dgk x;k % (i) ;g xSl ok;q ls Hkkjh gS] rFkk (ii) ;g xSl ty esa vR;f/kd foys; gSA uhps nh xbZ pkj O;oLFkkvksa esa ls og fo|kFkhZ] bu xq.kksa dks funf'kZr djus ds fy,] fdu nks dk mi;ksx djsxk \ (1) (2) II vkSj III (3) I vkSj III (4) 22. I vkSj II II vkSj IV Iron filings were added to a solution of copper sulphate. After 10 minutes, it was observed that the blue colour of the solution changes and a layer gets deposited on iron filings. The colour of the solution and that of the coating would, respectively, be : (1) yellow and green (2) brown and blue (3) red and greenish-blue (4) green and reddish-brown 31(P)/C 15 P.T.O. dkWij lYQsV foy;u esa yksg pw.kZ feyk;k x;kA 10 feuV ds i'pkr~ ;g ik;k x;k fd foy;u dh uhyk jax ifjofrZr gks x;k gS rFkk yksg pw.kZ ij ,d ijr te xbZ gSA foy;u rFkk yksg pw.kZ ij teh ijr ds jax e'k% D;k gSa \ (1) ihyk rFkk gjk (2) Hkwjk rFkk uhyk (3) yky rFkk gfjr&uhyk (4) gjk rFkk j kHk&Hkwjk 23. Given below are certain chemical properties of substances. (a) It turns blue litmus red. (b) It turns red litmus blue. (c) It reacts with zinc and a gas evolves. (d) It reacts with solid sodium carbonate to give brisk effervescence. Which out of these properties are shown by dilute hydrochloric acid ? (1) (a) and (b) only (2) (a) and (c) only (3) (a), (c) and (d) only (4) (b), (c) and (d) only uhps inkFkks ds dqN jklk;fud xq.k fn, x, gSaA (1) ;g uhys fyVel dks yky dj nsrk gSA (2) ;g yky fyVel dks uhyk dj nsrk gSA (3) ;g ftad ls vfHkf ;k djrk gS vkSj xSl fudyrh gSA (4) ;g Bksl lksfM;e dkcksZusV ls vfHkf ;k djds rhoz cqncqnkgV mRi djrk gSA buesa ls dkSu&dkSu ls xq.kksa dks ruq gkbM ksDyksfjd vEy n'kkZrk gS \ (1) dsoy (a) vkSj (b) (2) dsoy (a) vkSj (c) (3) dsoy (a), (c) vkSj (d) (4) dsoy (b), (c) vkSj (d) 24. The following instruments are available in a laboratory : Milliammeter A1 of range 0 - 300 mA and least count 10 mA Milliammeter A2 of range 0 - 200 mA and least count 20 mA Voltmeter V1 of range 0 - 5 V and least count 0.2 V Voltmeter V2 of range 0 - 3 V and least count 0.3 V Out of the following pairs of instruments, which pair would be the best choice for carrying out the experiment to determine the equivalent resistance of two resistors connected in series ? (1) Milliammeter A1 and voltmeter V1 (2) Milliammeter A2 and voltmeter V2 (3) Milliammeter A1 and voltmeter V2 (4) Milliammeter A2 and voltmeter V1 31(P)/C 16 fdlh iz;ksx'kkyk esa fuEufyf[kr midj.k miyC/k gSa % feyh,sehVj A1 ifjlj 0 - 300 mA rFkk vYire eki = 10 mA feyh,sehVj A2 ifjlj 0 - 200 mA rFkk vYire eki = 20 mA oksYVehVj V1 ifjlj 0 - 5 V rFkk vYire eki = 0.2 V oksYVehVj V2 ifjlj 0 - 3 V rFkk vYire eki = 0.3 V Js.kh e esa la;ksftr nks izfrjks/kdksa dk rqY; izfrjks/k Kkr djus ds iz;ksx esa bu midj.kksa esa ls fdu nks midj.kksa dk ;qxy lcls m ke p;u gksxk \ (1) feyh,sehVj A1 rFkk oksYVehVj V1 (2) feyh,sehVj A2 rFkk oksYVehVj V2 (3) feyh,sehVj A1 rFkk oksYVehVj V2 (4) feyh,sehVj A2 rFkk oksYVehVj V1 25. In an experiment to determine equivalent resistance of two resistors R1 and R2 in series, which one of the following circuit diagrams shows the correct way of connecting the voltmeter in the circuit ? (1) I (2) II (3) III (4) IV 31(P)/C 17 P.T.O. Js.kh e esa la;ksftr nks izfrjks/kdksa R1 rFkk R2 ds rqY; izfrjks/k dks Kkr djus ds iz;ksx esa ftl izdkj ls fo|qr~ ifjiFk esa oksYVehVj dks la;ksftr fd;k tkrk gS] uhps fn, x, fdl ifjiFk vkjs[k esa mls lgh <ax ls n'kkZ;k x;k gS \ (1) I (2) II (3) III (4) IV 31(P)/C 18 26. The current flowing through a conductor and the potential difference across its two ends are as per readings of the ammeter and the voltmeter shown below. The resistance of the conductor would be (1) 0.02 (2) 0.024 (3) 20.0 (4) 24.0 fdlh pkyd esa izokfgr fo|qr~ /kkjk rFkk mlds nks fljksa ds chp foHkokUrj ds eku uhps fp=k esa ,sehVj rFkk oksYVehVj esa n'kkZ, ikB~;kadksa ds vuqlkj gSaA pkyd dk izfrjks/k fdruk gksxk \ (1) (2) 0.024 (3) 20.0 (4) 27. 0.02 24.0 Which one of the following is the combination of relevant materials required for setting up an experiment to show that light is necessary for photosynthesis ? (1) Destarched leaves, strips of black paper, starch solution and iodine crystals (2) A potted plant, strips of coloured paper, starch solution, iodine and potassium iodide (3) Destarched leaves, strips of black paper, starch solution and potassium iodide (4) Destarched leaves, strips of black paper and iodine solution izdk'k la'ys"k.k ds fy, izdk'k vko';d gS] bls iz;ksx }kjk n'kkZus ds fy, fuEufyf[kr la;kstu esa ls fdl la;kstu esa iz;ksx ds fy, vko';d izklafxd lkexzh n'kkZ;h xbZ gS \ (1) LVkpZjfgr if k;k ] dkys dkxt dh if ;k ] LVkpZ foy;u rFkk vk;ksMhu f LVy (2) xeys esa ikS/kk] jaxhu dkxt dh if ;k ] LVkpZ foy;u] vk;ksMhu rFkk iksVSf'k;e vk;ksMkbM (3) LVkpZjfgr if k;k ] dkys dkxt dh if ;k ] LVkpZ foy;u rFkk iksVSf'k;e vk;ksMkbM (4) LVkpZjfgr if k;k ] dkys dkxt dh if ;k rFkk vk;ksMhu foy;u 31(P)/C 19 P.T.O. 28. Which one out of the following sets of diagrams correctly depicts reproduction in amoeba and yeast ? 31(P)/C 20 vehck rFkk ;hLV esa tuu dks n'kkZus okys uhps fn, x, pkj fe=kksa esa ls dkSulk lgh gS \ 31(P)/C 21 P.T.O. 29. A student was asked to focus a permanent slide under the high power of a microscope. This involved the following steps which have not been written in a correct sequence : A. Place the slide on the stage. B. Clean the microscope and lenses. C. Focus the material with the help of coarse adjustment. D. Place the low power objective lens above the slide. E. Sharpen the focus with fine adjustment. F. Bring high power objective lens over the slide. Which one of the following is the correct sequence of steps for focussing the slide under high power ? (1) A, B, C, D, E, F (2) B, A, C, D, E, F (3) A, B, F, C, D, E (4) B, A, D, C, F, E fdlh fo|kFkhZ ls ,d LFkk;h LykbM dks lw{en'khZ dh mPp {kerk esa Qksdflr djus ds fy, dgk x;kA bl izf ;k ds fuEufyf[kr pj.k gksrs gSa ftUgsa eokj ugha fy[kk x;k gS % A. LykbM dks eap ij jf[k,A B. lw{en'khZ o mlds ysalksa dks lkQ dhft,A C. LFkwy leatd ispksa dh lgk;rk ls LykbM dks Qksdflr dhft,A D. fuEu {kerk dk vfHkn`';d ysal LykbM ds ij jf[k,A E. lw{e leatd isap }kjk Qksdlu dks ifj" r dhft,A F. mPp {kerk ds vfHkn`';d ysal dks LykbM ds ij ykb,A fdlh LykbM dks mPp {kerk esa Qksdflr djus ds fy, fuEufyf[kr esa ls fdlesa fofHk pj.kksa dk e lgh gS \ (1) A, B, C, D, E, F (2) B, A, C, D, E, F (3) A, B, F, C, D, E (4) B, A, D, C, F, E 31(P)/C 22 30. While performing an experiment to determine the percentage of water absorbed by raisins, the following data was obtained : Mass of water taken in the beaker = 50 g Mass of raisins before soaking them in water = 5 g Mass of raisins after soaking in water for 2 hours = 8 g The percentage of water absorbed by raisins would be (1) (2) (3) (4) fd'kfe'kksa }kjk vo'kksf"kr ty dh izfr'krrk Kkr djus ds iz;ksx esa fuEufyf[kr vk dM+s izkIr gq, % chdj esa fy, x, ty dk nzO;eku = 50 g ty esa fHkxksus ls igys fd'kfe'kksa dk nzO;eku = 5 g ty esa 2 ?k.Vs fHkxksus ds i'pkr~ fd'kfe'kksa dk nzO;eku = 8 g fd'kfe'kksa }kjk vo'kksf"kr ty dh izfr'krrk gksxh (1) (2) (3) (4) 31(P)/C 23 P.T.O. SPACE FOR ROUGH WORK jQ dk;Z ds fy, txg 31(P)/C 24

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