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HIMACHAL PRADESH MAR 2008 :Science And Technology

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foKku ,oa izkS|ksfxdh SCIENCE & TECHNOLOGY iw.kkZd % 60 a le; % 3 ?kaVs Time Allowed : 3 Hrs uksV & 1) 2) 3) 4) 5) 6) 7) Q. 1. Q. 2. M. Marks : 60 lHkh iz u vfuok;Z gSa A iz u la[;k 1&15 rd vfr y?kq mRrjh; iz u gSa A buds mRrj ,d kCn ;k ,d okD; ls vf/kd u gksaA iz u la[;k 16&29 rd y?kq mRrjh; iz u gSa A buds mRrj 30 kCnksa ls vf/kd u gksA a iz u la[;k 30&35 rd ds iz uksa ds mRrj 40 kCnksa ls vf/kd u gkaA s iz u la[;k 36&38 rd nh?kZ mRrjh; iz u gSa A buds mRrj 70 kCnksa ls vf/kd u gkaA s vko ;drkuqlkj ukekafdr fp= Hkh cukb,A iz u ua 1&15 rd ds iz uksa ds mRrj dkV dj fy[kus ij vad ugha fn, tk;sxA as jklk;fud lehdj.k dks larqfyr dhft,A NaCl + AgNO3 AgCl + Na NO3 Balance the equation NaCl + AgNO3 AgCl + Na NO3 ,slh /kkrq dk mnkgj.k nhft, tks m ek dh daqpkyd gksrh gSA Give an example of a metal which is a poor conductor of heat. Q. 3. 1 fdl rRo dk bysDV kfud foU;kl 2] 8] 2 gS \ s Which element has the electronic configuration 2, 8, 2 ? Q. 6. 1 gkbM ktuhdj.k D;k gS \ s What is Hydrogenation ? Q. 5. 1 ,lhfVd vEy esa mifLFkr izdk;kZRed lewg dk uke o lw= fy[kksA Name the functional group and formula present in acitic acid. Q. 4. 1 1 vk/kqfud vkorZ lkj.kh esa fdrus oxZ o fdrus vkorZ gksrs gSa \ How many groups and periods are present in Modern Periodic Table. 27 1 Q. 7. {kqnzk= esa Hkkstu ds fdu vo;oksa dk iw.kZ ikpu gksrk gS \ a Which components of food are completely digested in small intestine? Q. 8. efLr d dk dkSu lk Hkkx kjhj dh fLFkfr o larqyu dk vuqj{k.k djrk gS \ Which part of the brain maintains posture and equilibrium of the body? Q. 9. 1 ,d ikni dksf kdk esa dkSu lk gkeksZu dksf kdk foHkktu dks iszfjr djrk gS \ Which hormone promotes cell-division in a plant cell? Q. 10. 1 1 dkSu lh lajpuk Hkwz.k dks eka ls iks k.k iznku djrh gS \ Which special tissue provides nutrition to the embryo from the mother s body? 1 Q. 11. ekuo dk oSKkfud uke crkb,A Write the scientific name of human. Q. 12. 1 fdUgha nks jksxksa ds uke crkb, ftu ls ihfM+r O;fDr us=nku ugha dj ldrsA Name any two diseases, if a person is infected with, can not donate eyes. 1 Q. 13. lw;Z ds izdk k dk LisDV e izkIr djus ds fy, dkap ds fizTe dk loZizFke mi;ksx fdl + oSKkfud us fd;k Fkk \ Who was the first person to use a glass prism to obtain the spectrum of sunlight? 1 Q. 14. ml ;qfDr dk uke crkb, tks fdlh pkyd ds fljksa ij foHkokarj cuk, j[kus esa lgk;rk djrh gS\ Name a device that helps to maintain a potential difference across a conductor. 1 Q. 15. fuofr esa izdk k dh pky D;k gS \ What is the velocity of light in vacuum? Q. 16. fpIl dh FkSyh esa dkSu lh xSl Hkjh gksrh gS vkSj D;ksa \ Which gas is flushed in chips bags and why ? Q. 17. 1 mnklhuhdj.k vfHkf ;k D;k gS \ nks mnkgj.k nhft, A What is neutralisation reaction? Give two examples. Q. 18. 1 1 rkts nw/k ds pH dk eku 6 gksrk gS A ngh cu tkus ij blds pH ds eku esa D;k ifjorZu gksxk\ viuk mRrj le>kb,A 28 Fresh milk has a pH of 6. How do you think the pH of milk will change as it turns into curd? Explain your answer. 1 Q. 19. U;wySM~l dk v Vd fl)kUr D;k gS \ a What is Newland s Law of Octaves? Q. 20. gekjs vek ; esa vEy dh D;k Hkwfedk gS \ What is the role of acid in our stomach ? Q. 21. 1 ijkx.k f ;k fu kspu ls fdl izdkj fHkUu gS \ How is the process of pollination different from fertilisation? Q. 22. 1 1 vyaSfxd tuu dh vis{kk ySfxd tuu }kjk mRiUu fofHkUurk,a vf/kd LFkk;h D;ksa gksrh a gSa \ Why sexual reproduction gives rise to more viable variations than asexual reproduction? 1 Q. 23. ,d xksyh; niZ.k dh o rk f=T;k 18 lSeh0 gSA bldh Qksdl nwjh D;k gksxh \ a The radius of curvature of a spherical mirror is 18 cm. What is its focal length? 1 Q. 24. d{kk dh vafre iafDr esa cSBs fo|kFkhZ dks ;keiV~V i<+us esa dfBukbZ gksrh gSA ;g fo|kFkhZ fdl n`f V nks k ls ihfM+r gS\ bl nks k dks nwj dSls fd;k tk ldrk gS \ A student sitting in the last row finds difficulty in reading the blackboard. What could be the defect the child suffering from? How can it be corrected? 1 Q. 25. vksg~e dk fu;e D;k gS \ What is Ohm s Law? Q. 26. 1 /kkrq ds vkoj.k okys fo|qr lkf/k=ksa dks HkwlifdZr djuk D;ksa vko ;d gS \ a Why is it necessary to earth electric appliances of metallic cover? 1 Q. 27. vkstku ijr dh {kfr gekjs fy, fpUrk dk fo k; D;ksa gS \ +s Why is damage to the ozone layer a cause for concern? Q. 28. 1 ikyhFkhu dh FkSfy;ksa ds mi;ksx ij izfrcU/k vko ;d D;ksa gS \ Why the ban on use of polythene bags is necessary? 29 1 gesa ouksa ,oa oU; izkf.k;ksa dk laj{k.k D;ksa djuk pkfg, \ Q. 29. Why should we conserve forests and wild life? 1 tkZ ladV ls D;k vfHkizk; gS \ Q. 30. What is energy crisis? 2 lkcqu dh lQkbZ izf ;k dh f ;k fof/k le>kb, A Q. 31. Explain the mechanism of the cleaning action of soaps. 2 Mh0,u0,0 dh izfrd`fr dk iztuu esa D;k egRo gS\ Q. 32. What is the importance of D.N.A. copying in reproduction. 2 fdlh fcac dk vory niZ.k }kjk cuk izfrfacc vkHkklh] lh/kk rFkk facc ls cM+k gks rks oLrq a a dh fLFkfr dgka gksuh pkfg,A vkjs[k }kjk le>kb,A Q. 33. Draw a diagram to show the position of an object if the image formed by concave mirror is observed to be virtual, erect and larger than the object. 2 ?kjsyw fo|qr ifjiFkksa esa Js.kh e la;kstu dk mi;ksx D;ksa ugha fd;k tkrk gS\ Li V dhft,A Q. 34. Explain why is the series arrangement not used for domestic circuits? 2 ukfHkdh; tkZ dk D;k egRo gS \ Q. 35. What are the advantages of nuclear energy ? Q. 36. d [k /kkrq o v/kkrq esa vUrj Li V dhft,A feJ /kkrq D;ksa cuk, tkrs gSa \ a) b) Differentiate between metals and non-metals. What is the need to prepare an Alloy? 2 2, 2 ;k or dksbZ 5-0 lS0eh0 lkbt+ dk facc fdlh 16-0 lS0eh0 Qksdl nwjh ds vory niZ.k ls a 24-0 lS0eh0 nwjh ij j[kk gSA niZ.k dh fdruh nwjh ij insZ dks j[kk tk, fd Li V izfrfcac izkIr gksA izfrfcac dh izd`fr o lkbt+ Hkh Kkr djsA a An object 5.0 cm in size is placed at 24.0 cm. infront of a concave mirror of focal length 16.0 cm. At what distance from the mirror should a screen be placed in order to obtain a sharp image. Find the nature and size of the image. 4 30 ukekafdr vkjs[k [khap dj fdlh fo|qr tfu= dk ewy fl)kUr rFkk dk;Zfof/k dk o.kZu dhft,A Q. 37. Explain the underlying principle and working of an electric generator by drawing a labelled diagram. 4 Q. 38 d [k a) b) ,d raf=dk dksf kdk U;wjkWu dh lajpuk cukb, rFkk blds dk;ksZa dk o.kZu dhft,A vuSfPNd f ;k,a rFkk izfrorhZ f ;k,a ,d nwljs ls fdl izdkj fHkUu gaSA Draw the structure of a neuron and explain its functions. How are involuntary actions and reflexactions different from each other? 2+2=4 31

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