
	Trending ▼ ICSE CBSE 10th ISC CBSE 12th CTET GATE UGC NET Vestibulares ResFinder

CBSE Class X 2007 : SCIENCE & TECHNOLOGY (NE) [Set 2]

7 pages, 88 questions, 0 questions with responses, 0 total responses,

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

+Fave Message

Profile Timeline Uploads Q & A

Home > CBSE - main folder >

Instantly get Model Answers to questions on this ResPaper. Try now!
NEW ResPaper Exclusive!

Formatting page ...

Roll No. jksy uaCode No. Series RKM/NE dksM ua- NE 31/1 Please check that this question paper contains 7 printed pages. Code number given on the right hand side of the question paper should be written on the title page of the answer-book by the candidate. Please check that this question paper contains 24 questions. Please write down the serial number of the question before attempting it. i;k tk p dj ysa fd bl iz'u&i=k esa eqfnzr i`"B 7 gSaA iz'u&i=k esa nkfgus gkFk dh vksj fn, x, dksM uEcj dks Nk=k m kj&iqfLrdk ds eq[k&i`"B ij fy[ksaA i;k tk p dj ysa fd bl iz'u&i=k esa 24 iz'u gSaA i;k iz'u dk m kj fy[kuk 'kq: djus ls igys] iz'u dk ekad vo'; fy[ksaA SCIENCE AND TECHNOLOGY (Theory) foKku ,oa izkS|ksfxdh lS)kfUrd Time allowed : 2 hours Maximum Marks: 60 fu/kkZfjr le; % 2 ?k.Vs vf/kdre vad % 60 General Instructions : (i) The question paper comprises of two sections, A and B. You have to attempt both the sections. (ii) You are advised to attempt all the questions of Section A and Section B separately. (iii) All questions are compulsory. (iv) There is no overall choice. However, internal choice has been provided in some questions. You are to attempt only one option in such questions. (v) Marks allocated to every question are indicated against it. (vi) Questions number 1-4 in Section A and 17, 18 in Section B are very short answer questions. These are to be answered in one word or one sentence. (vii) Questions number 5-8 in Section A and 19, 20 in Section B are short answer questions. These are to be answered in 30 - 40 words each. (viii) Questions number 9-14 in Section A and 21 - 23 in Section B are also short answer questions. These are to be answered in 40 - 50 words each. (ix) Questions number 15, 16 in Section A and 24 in Section B are long answer questions. These are to be answered in 70 words each. 31/1/NE 1 P.T.O. lkekU; funsZ'k % (i) bl iz'u&i=k ds nks [k.M] v ,oa c gSaA vkidks nksuksa [k.Mksa ds iz'uksa ds m kj nsus gSaA (ii) vkidks fdlh ,d [k.M ds lHkh iz'uksa ds m kj ,d lkFk fy[kus ds i'pkr~ gh nwljs [k.M ds iz'uksa ds m kj nsus gSaA (iii) lHkh iz'u vfuok;Z gSaA (iv) bl iz'u&i=k esa dksbZ O;kid p;u ugha gSA rFkkfi dqN iz'uksa esa oSdfYid vUr% p;u miyC/k gSaA ,sls iz'uksa esa vkidks fn, x, p;u esa ls dsoy ,d iz'u gh djuk gSA (v) izR;sd iz'u ds fy, fu;r vad mlds lkeus n'kkZ, x, gSaA (vi) [k.M v ds iz'u la[;k 1&4 rFkk [k.M c ds iz'u la[;k 17] 18 vfr y?kq m kj izdkj ds iz'u gSaA bu iz'uksa ds m kj ,d 'kCn rFkk ,d okD; esa nsus gSaA (vii) [k.M v ds iz'u la[;k 5&8 rFkk [k.M c ds iz'u la[;k 19] 20 y?kq m kj izdkj ds iz'u gSaA buesa izR;sd ds m kj 30&40 'kCnksa esa nsus gSaA (viii) [k.M v ds iz'u la[;k 9&14 rFkk [k.M c ds iz'u la[;k 21&23 Hkh y?kq m kj izdkj ds iz'u gSaA buesa izR;sd ds m kj 40&50 'kCnksa esa nsus gSaA (ix) [k.M v ds iz'u la[;k 15] 16 rFkk [k.M c dk iz'u la[;k 24 nh?kZ m kj izdkj ds iz'u gSaA buesa izR;sd ds m kj 70 'kCnksa esa nsus gSaA SECTION A [k.M v 1. The pH of three acids A, B and C having equimolar concentrations are 40, 50 and 3.5 respectively, at 298 K. Arrange these acids in order of their increasing acidity. 1 le&v.kqd lkanzrkvksa okys rhu vEyksa A, B vkSj C ds pH eku 298 K ij e'k% 4.0, 5.0 vkSj 3.5 gSaA bu vEyksa dks mudh vEy izcyrk ds c<+rs gq, e esa O;ofLFkr dhft,A 2. What chemical process is used to obtain a metal from its oxide ore ? 1 vkWDlkbM v;Ld ls /kkrq izkIr djus ds fy, dkSulk jklk;fud iz e mi;ksx esa ykrs gSa \ 3. For a plane mirror, magnification is m = +1. What does the positive sign of m signify ? lery niZ.k ds fy,] vko/kZu] m = +1 gSA m dk /kukRed fpg~u D;k n'kkZrk gS \ 1 4. Why does the pole star appear fixed in the sky ? 1 vkdk'k esa /kzqo rkjk fLFkj D;ksa fn[kkbZ nsrk gS \ 5. What is gypsum ? Name the main product formed when gypsum is heated to 373 K. Write two uses of the product. ftIle D;k gS \ bldks 373 K rki rd xje djus ij izkIr izeq[k mRikn dk uke fyf[k,A bl 2 mRikn ds nks mi;ksx fyf[k,A 6. Differentiate between roasting and calcination. Give one example of each. HktZu ,oa fuLrkiu esa Hksn dhft,A izR;sd dk ,d&,d mnkgj.k nhft,A 31/1/NE 2 2 7. Two thin lenses of power + 4.5 D and 2.5 D are placed in contact. Find the power and focal length of the lens combination. 2 nks irys ysal ftudh {kerk + 4.5 D vkSj 2.5 D gS] ,d&nwljs ds lEidZ esa j[ks gSaA bl ysal la;kstu dh {kerk rFkk Q+ksdl nwjh Kkr dhft,A 8. Distinguish between polar and equatorial orbits for artificial satellites. Illustrate the two orbits through a diagram. 2 f=ke mixzgksa dh /kzqoh; rFkk fo"kqorh; d{kkvksa esa varj dhft,A bu nksuksa d{kkvksa dks ,d vkjs[k }kjk n'kkZb,A 9. (a) Define the term, rate of a reaction . (b) Name any two factors which affect the rate of a reaction. (c) What will be the effect of increase in temperature on the concentration of product(s) of an exothermic reversible reaction carried out in a closed container ? 3 v ^vfHkf ;k&nj* dh ifjHkk"kk fyf[k,A c fdUgha nks dkjdksa ds uke fyf[k, tks vfHkf ;k dh nj dks izHkkfor djrs gSaA l can ik=k esa lai ,d "ek{ksih mR e.kh; vfHkf ;k ds mRikn mRiknksa dh lkanzrk ij rki ds c<+kus dk D;k izHkko gksxk \ 10. Explain giving reasons : 3 (i) The surface of some metals acquires a dull appearance when exposed to air for a long time. (ii) Non-metals do not replace hydrogen from dilute acids. (iii) Sulphuric acid is known as the king of chemicals . dkj.k crkrs gq, Li"V dhft, % (i) dqN /kkrqvksa dks dkQ+h le; ds fy, ok;q esa [kqyk NksM+ nsus ij muds i`"Bksa dh ped de gks tkrh gSA (ii) v/kkrq, ruq vEyksa ls gkbM kstu foLFkkfir ugha djrh gSaA (iii) lY +;wfjd vEy dks ^jlk;uksa dk jktk* dgk tkrk gSA 11. What is formalin ? What is it used for in the school laboratory ? Name the main product formed when formalin is treated with Fehling s reagent. 3 Q+kWesZfyu D;k gksrk gS \ bldk mi;ksx fo|ky; dh iz;ksx'kkyk esa fdl dke ds fy, gksrk gS \ bldh Q+sfyax vfHkdeZd ds lkFk vfHkf ;k }kjk cus izeq[k mRikn dk uke fyf[k,A 12. What is meant by refractive index of a transparent medium ? Trace the path of a ray of light to show that the emergent ray is laterally displaced when it passes through a rectangular slab. 3 fdlh ^ikjn'khZ ek/;e ds viorZukad* dk D;k vFkZ gS \ izdk'k tc fdlh vk;rdkj dk p ds LySc flYyh ls gksdj tkrk gS rks fuxZr fdj.k dk ikf'Zod foLFkkiu gks tkrk gSA bl lR; dks n'kkZus ds fy, ,d izdk'k fdj.k vkjs[k [khafp,A 31/1/NE 3 P.T.O. 13. In the circuit shown in the figure below, calculate (i) the current flowing through the arms AB, CDE and BH, (ii) the potential difference across AB, CD and DE. 3 fp=k esa fn, x, ifjiFk esa (i) AB, CDE rFkk BH Hkqtkvksa esa izokfgr gks jgh /kkjk] (ii) AB, CD rFkk DE ds fljksa ds chp foHkokarj] ifjdfyr dhft,A 14. What are magnetic field lines ? How is the direction of a magnetic field at a point determined ? List two important properties of magnetic field lines. 3 pqacdh; {ks=k js[kk, D;k gksrh gSa \ fdlh fcUnq ij pqacdh; {ks=k dh fn'kk dSls fu/kkZfjr dh tkrh gS \ pqacdh; {ks=k js[kkvksa ds nks izeq[k xq.k/keks dks lwphc) dhft,A 15. (a) Name the ore from which iron is extracted. Write its chemical formula. (b) Name the raw materials required for extracting iron. (c) Which reducing agent reduces the iron ore in the blast furnace ? (d) Write the chemical reactions that take place in the blast furnace for the extraction of iron from its ore. 5 OR (a) What does Fountain Experiment demonstrate about ammonia ? Describe with a labelled diagram, the Fountain Experiment. (b) Describe the changes you would observe when (i) NH4OH is gradually added to CuSO4 solution till it is in excess. (ii) SO2 gas is passed through acidified potassium dichromate solution. 31/1/NE 4 5 v ml v;Ld dk uke fyf[k, ftlls yksgs dk fu"d"kZ.k djrs gSaA bldk jklk;fud lw=k fyf[k,A c yksgs ds fu"d"kZ.k ds fy, mi;ksx esa vkus okys dPps inkFkks ds uke fyf[k,A l ml vipk;d dk uke crkb, tks okR;k Hk h esa yksg v;Ld dks vipf;r djrk gSA n okR;k Hk h esa yksg ds v;Ld ls fu"d"kZ.k ds le; gksus okyh jklk;fud vfHkf ;kvksa dks fyf[k,A vFkok v veksfu;k ds lanHkZ esa ^Q+Ookjk iz;ksx* D;k n'kkZrk gS \ ukekafdr fp=k dh lgk;rk ls Q+Ookjk iz;ksx dk o.kZu dhft,A c o.kZu dhft,] vki D;k ifjorZu izsf{kr djsaxs tc (i) NH4OH dks /khjs&/khjs CuSO4 foy;u esa mlds vkf/kD; gksus rd Mkyrs gSaA (ii) SO2 xSl dks vEyh; iksVSf'k;e Mkb ksesV foy;u esa izokfgr djrs gSaA 16. What is Myopia ? Write two causes for this defect to occur. With the help of ray diagrams illustrate how this defect can be corrected. A person with a myopic eye cannot see objects beyond 1.5 m distinctly. What should be the power of the corrective lens used to restore proper vision ? 5 OR (a) (i) Why are fossil fuels classified as non-renewable sources of energy ? (ii) Mention any two differences between the two common designs of solar cookers. (iii) Why is tidal energy not likely to be a potential source of energy ? (b) (i) State the roles of moderator and coolant fluid in a nuclear reactor. (ii) Name one moderator and one coolant employed widely. 5 fudV&n`f"V nks"k D;k gksrk gS \ bl nks"k ds gksus ds nks dkj.k fyf[k,A fdj.k vkjs[kksa }kjk n'kkZb, fd bl nks"k dk la'kks/ku fdl izdkj fd;k tk ldrk gSA fudV&n`f"V nks"k dk dksbZ O;f 1.5 m ls vf/kd nwjh ij j[kh oLrqvksa dks lqLi"V ugha ns[k ldrkA bl nks"k dks nwj djus ds fy, iz;q la'kks/kd ysal dh {kerk D;k gksuh pkfg, \ vFkok v (i) thok'e b /kuksa dks tkZ ds vuohdj.kh; lzksrksa ds :i esa D;ksa oxhZ r fd;k tkrk gS \ (ii) lkSj&dqdjksa ds nks lkekU; fMt+kbuksa ds chp dksbZ nks varj fyf[k,A (iii) Tokjh;& tkZ laHkkO; tkZ lzksr D;ksa ugha gks ldrh \ c (i) fdlh ukfHkdh; fj,DVj esa eand rFkk rjy 'khryd dh D;k Hkwfedk gksrh gS \ (ii) O;kid :i esa mi;ksx esa vkus okys ,d eand rFkk ,d 'khryd dk uke fyf[k,A 31/1/NE 5 P.T.O. SECTION B [k.M c 17. Define eutrophication 1 ^lqiks"k.k* dh ifjHkk"kk fyf[k,A 18. What is a neuron ? 1 raf=kdksf'kdk D;k gS \ 19. How is respiration different from breathing ? Distinguish between aerobic and anaerobic respiration. OR 2 Describe an activity to show that carbon dioxide is necessary for photosynthesis. 'olu vkSj 'okl ysus esa D;k vUrj gS \ ok;oh; vkSJ vok;oh; 'olu ds chp varj crkb,A vFkok ,d f ;kdyki }kjk ;g n'kkZb, fd izdk'k&la'ys"k.k ds fy, dkcZu MkbvkWDlkbM vfuok;Z gSA 20. Suggest any four practices which may help in protecting our environment. 2 gekjs i;kZoj.k laj{k.k esa lgk;d dksbZ pkj vkpj.k lq>kb,A 21. Define evolution . Describe Darwin s theory of evolution. 3 OR What is a gene ? Where are the genes located ? What is the nature of gene ? ^fodkl* dh ifjHkk"kk fyf[k,A MkfoZu ds fodkl ds fl)kUr dk o.kZu dhft,A vFkok thu D;k gS \ thu dgk fLFkr gksrs gSa \ thu dh iz fr D;k gS \ 22. (a) Define the terms unisexual and bisexual, giving one example of each. (b) List the reproductive parts of a flower. 3 v ,dfyaxh rFkk f}fyaxh 'kCnksa dh ifjHkk"kk ,d&,d mnkgj.k lfgr fyf[k,A c ,d iq"i ds tuu vaxksa ds uke fyf[k,A 23. Nervous and hormonal system together perform the function of control and coordination in human beings. Justify the statement. ^^euq";ksa esa raf=kdk ra=k vkSj gkWeksZu ra=k ,d lkFk feydj fu;a=k.k ,oa leUo; dk dk;Z djrs gSaA** bl dFku dks izekf.kr dhft,A 31/1/NE 6 3 24. (a) Draw a diagram of the human heart. Label Aorta, Pulmonary trunk, Right atrium and Left ventricle on it. (b) What is the meaning of the term, double circulation ? (c) List the components of blood. 5 v ekuo n; dk vkjs[k [khafp,A ml ij egk/keuh] QqIQql egkokfguh] nkfguk vfyUn o ck;k fuy; vafdr dhft,A c ^nksgjs ifjlapj.k* dk D;k vFkZ gS \ l #f/kj ds fofHk vo;oksa dks lwphc) dhft,A 31/1/NE 7 P.T.O.

Formatting page ...

Additional Info : Solved CBSE Class 10 Board exam paper study guide - CBSE 2007 :SCIENCE & TECHNOLOGY NE - C.B.S.E. Free Online Question Paper
Tags : science and technology, 2007, cbse class 10, c.b.s.e. class X, central board of secondary education, solved cbse class 10 board exam papers, free sample question papers, online model answers, students, teachers, cbse schools, india, cbse class X examination results, INDIA - OUTSIDE DELHI, cbse class x, cbse 10, cbse 10th standard, cbse papers, cbse sample papers, cbse books, portal for cbse india, cbse question bank, central board of secondary education, cbse question papers with answers, prelims preliminary exams, pre board exam papers, cbse model test papers, solved board question papers of cbse last year, previous years solved question papers, free online cbse solved question paper, cbse syllabus, india cbse board sample questions papers, last 10 years cbse papers, cbse question papers 2017, cbse guess sample questions papers, cbse important questions, specimen / mock papers 2018.

cbse10 chat

Horizontal lines at:
Guest Horizontal lines at:
AutoRM Data:
Box geometries: