Documents

10_2005_science_and_technology_1.pdf

Description
For more previous year question papers visit : www.4ono.com Code No. dksM ua- 31/1/1 Candidates must write the code on the title page of the answer-book.
Categories
Published
of 8
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Related Documents
Share
Transcript
  1 Code No.  dks M ua- dks M ua-  dks M ua- dks M ua-  dks M ua- Candidates must write the code onthe title page of the answer-book.  ijh{kkFkhZ dks M dks mÙkj&iq fLrdk ds eq [k   i`  B ij vo'; fy[ks aA ã Please check that this question paper contains 8 printed pages. ã Code number given on the right hand side of the question paper should be written onthe title page of the answer-book by the candidate. ã Please check that this question paper contains 30questions. ã Please write down the serial number of the question before attempting it. ã  Ñi;k tk¡ p dj ys a fd bl iz'u&i=k es a eq fnz r i`  B    8    gS aA ã  iz'u&i=k es a nkfgus gkFk dh vks j fn, x, dks M uEcj dks Nk=k mÙkj&iq fLrdk ds eq[k&i`  B ij fy[ks aA ã  Ñi;k tk¡ p dj ys a fd bl iz'u&i=k esa 30  iz'u gS aA ã  Ñi;k iz'u dk mÙkj fy[kuk 'kq : djus ls igys] iz'u dk Øeka d vo'; fy[ks aA Ñi;k iz'u dk mÙkj fy[kuk 'kq : djus ls igys] iz'u dk Øeka d vo'; fy[ksaA  Ñi;k iz'u dk mÙkj fy[kuk 'kq : djus ls igys] iz'u dk Øeka d vo'; fy[ks aA Ñi;k iz'u dk mÙkj fy[kuk 'kq : djus ls igys] iz'u dk Øeka d vo'; fy[ksaA  Ñi;k iz'u dk mÙkj fy[kuk 'kq: djus ls igys] iz'u dk Øeka d vo'; fy[ks aA SCIENCE AND TECHNOLOGY (Theory)  foKku ,oa iz kS|ks fxdh ¼lS)kfUrd½ foKku ,oa iz kS|ks fxdh ¼lS)kfUrd½  foKku ,oa iz kS|ks fxdh ¼lS)kfUrd½ foKku ,oa iz kS|ks fxdh ¼lS)kfUrd½  foKku ,oa izkS|ks fxdh ¼lS)kfUrd½ Time allowed : 3 hours ][ Maximum Marks : 75 fu/kkZfjr le;  : 3  ?k.Vs  ][  vf/kdre va d  : 75 General Instructions : (i)The question paper comprises of  two  sections, A and B. You are toattempt both the sections.(ii)The candidates are advised to attempt all the questions of Section Aseparately 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)Question numbers 1-5  in Section A and  21-23  in Section B are veryshort answer questions. These are to be answered in  one word   or  one sentence. (vii)Question numbers 6-10  in Section A and  24-25  in Section B are short answer questions. These are to be answered in  30-40  words each. 31/1/1 For more previous year question papers visit : www.4ono.com  2 (viii)Question numbers 11-17   in Section A and  26-29  in Section B are alsoshort answer questions. These are to be answered in  40-50  words each.(ix)Question numbers 18-20  in Section A and  30  in Section B are longanswer questions. These are to be answered in 70  words each. lkekU; funs  Z  'k lkekU; funs  Z  'k  lkekU; funs  Z  'k lkekU; funs  Z  'k  lkekU; funsZ  'k   : (i)  bl iz'u&i=k ds nks [k.M] v ,oa c gS a A vkidks nks uksa [k.Mks a ds iz'uks a ds mÙkj ns us gS a A  (ii)  ijh{kkFkhZ fdlh ,d [k.M ds lHkh iz'uks a ds mÙkj ,d lkFk fy[kus ds i'pkr~ gh nwljs [k.M ds iz'uks a ds mÙkj ns a A  (iii)  lHkh iz'u vfuok;Z gS a A  (iv)  bl iz'u&i=k es a dks bZ O;kid p;u ugha gS A rFkkfi dqN iz'uks a es a oS dfYid vUr% p;u  miyC/k gS aA ,sls iz'uks a es a vkidks fn, x, p;u esa ls ds oy ,d iz'u gh djuk gS A  (v)  izR;s d iz'u ds fy, fu;e va d mlds lkeus n'kkZ , x, gS a A  (vi)  [k.M v ds iz'u la [;k  1 - 5  rFkk [k.M c ds iz'u la [;k   21 - 23  vfr y?kq mÙkj izdkj ds iz'u gS a A bu iz'uks a ds mÙkj   ,d 'kCn ,d 'kCn ,d 'kCn ,d 'kCn ,d 'kCn   vFkok   ,d okD; ,d okD; ,d okD; ,d okD; ,d okD;   es a ns us gS aA  (vii)  [k.M v ds iz'u la [;k  6 - 10  rFkk [k.M c ds iz'u la[;k   24 - 25  y?kq mÙkj izdkj ds iz'u gS a A bues a izR;sd ds mÙkj   30 - 40  'kCnks a es a ns us gS a A  (viii)  [k.M v ds iz'u la [;k  11 - 17   rFkk [k.M c ds iz'u la [;k   26 - 29  y?kq mÙkj izdkj ds iz'u gS a A bues a izR;s d ds mÙkj   40 - 50  'kCnks a es a ns us gS a A  (ix)  [k.M v ds iz'u la [;k  18 - 20 rFkk [k.M c dk iz'u la[;k   30  nh?kZ mÙkj izdkj ds iz'u gS a A buesa izR;sd ds mÙkj  70  'kCnks a es a ns us gS aA  SECTION - A  [k.M µ v  [k.M µ v  [k.M µ v  [k.M µ v  [k.M µ v  1. Give an example of photochemical reactions.1  izdk'k&jklk;fud vfHkfØ;kvks a dk ,d mnkgj.k fyf[k,A 2. Name a metal which offers higher resistance to the passage of electricity thancopper.1  ,d ,s lh /kkrq dk uke fyf[k, tks fo|qr~ /kkjk iz okg es a rk¡ cs ls vf/kd iz frjks/k iz nku djrh gksA 3. State a reaction in which SO 2  acts as an oxidising agent.1  ,d ,s lh vfHkfØ;k fyf[k, ftles a SO 2  ,d mipk;d ¼vkW Dlhdkjd½ dk dk;Z djrh gSA 4. Where will the image be formed by concave mirror when an object is placedbetween the pole and the focus point of the mirror ?1  ,d vory niZ.k ds /kz   qo vkS j Qks dl fcUnq ds chp j[kh fdlh oLrq dk iz frfcEc dgk¡ cus xk\  3 5. Which has a higher resistance : a 50 W lamp bulb or a 25 W lamp bulb andhow many times ?1  fdldk izfrjks/k vf/kd gks xk % 50 okW V ds yS Ei cYc dk vFkok 25 okW V ds yS Ei cYc dk vkS j   fdrus xq uk gks xk \ 6. How is plaster of Paris chemically different from gypsum ? How may they beinterconverted ? Write one use of plaster of Paris.2  IykLVj vkW Q is fjl ftIle ls D;k jklk;fud vUrj j[krk gS \ bUgs a ,d&nw  ljs es a dS ls cnyk tk   ldrk gS \ IykLVj vkWQ is fjl dk dks bZ ,d mi;ks x fyf[k,A 7. Allotropy is a property shown by which class of substances, elements,compounds or mixtures ? Give one example of allotropy.2 vij:irk fdl iz dkj ds inkFkZ iz nf'kZ r djrs gS a] rRo] ;kS fxd vFkok feJ.k \ vij:irk dk ,d   mnkgj.k fyf[k,A 8. Draw diagrams to distinguish between 'equatorial orbit' and 'polar orbit' of artificial satellites of earth.2  i`Foh ds Ñf=ke mixz gks a dh ^fo kq orh; d{kk* vkS j ^/kq  z oh; d{kk* dk Hks n Li V djus ds fy, nks uks a  izdkj dh d{kkvks a ds vkjs [k iz Lrqr dhft,A 9. With respect to air the refractive indices of water and benzene are 1.33 and 1.50respectively. Calculate the refractive index of benzene with respect to water.2  ok;q ds lkis{k ikuh dk viorZ uka d 1-33 gS rFkk cs a thu dk viorZ uka d 1-50 gSA ikuh ds lkis{k   cs a thu dk viorZukad ifjdfyr dhft,A 10. What is the cause of release of unusually large energies in unclear fissionreactions ? How is the energy per fission calculated ?2 Or What is a thermal neutron ? Draw a schematic diagram depicting fission of aU-235 necleus on absorption of a thermal neutron.  ds Unz d fo[ka Mu iz fØ;kvks a es a vlk/kkj.k :i ls vf/kd ÅtkZ ds foeq äu dk dkj.k D;k gksrk   gS \ iz fr fo[ka Mu iz kI; ÅtkZ dk ifjdyu dS ls fd;k tkrk gS \ vFkok vFkok vFkok vFkok vFkok   rkih; U;w  Vª kW u fdls dgrs gS a \ rkih; U;wVª kW u vo'kks  k.k }kjk iz kjfEHkr  U-235  ukfHkd ds fo[ka Mu  dks ,d fp=k }kjk fn[kkb,A  4 11. (a)State the relation between hydrogen ion concentration of an aqueoussolution and its pH.(b)The pH of an aqueous solution decreases from 3 to 2. Calculate how manytimes the hydrogen ion concentration of the solution will change.3 ¼v½ fdlh tyh; foy;u es a gkbMªks tu vk;uks a dh lkUnz rk rFkk foy;u ds pH  eku ds chp dk  lEcU/k lw  =k fyf[k,A¼c½ ,d foy;u dh  pH3  ls 2  gks tkrh gA ifjdyu dhft, fd mles a gkbMª ks tu vk;uks a dh   lkUnz rk fdrus xq uk cny tk,xhA 12. Explain the following regarding the manufacture of ammonia by Haber's process,the reaction being :N 2  (g) + 3H 2  (g) 2NH 3  (g) + heat(i)This reaction is carried out at a high temperature even though it is anexothermic reaction.(ii)To make ammonia, the mixture of N 2  and H 2  gases is passed over heatediron.3  gkcj fof/k }kjk veks fu;k ds mRiknu ls lEcfU/kr fuEufyf[kr ckrksa ds dkj.k Li V dhft,AvfHkfØ;k lehdj.k % N 2  (g) + 3H 2  (g) 2NH 3  (g) +  Å ek  (i)  Å ek{ks ih gks rs gq, Hkh og vfHkfØ;k mPp rki ij fu;ks ftr dh tkrh gSA (ii)  veks fu;k cukus ds fy,  N 2  vkS j  H 2  xS lksa ds feJ.k dks rIr vk;ju ij iz okfgr fd;k tkrk  gSA 13. (i)Distinguish between an addition polymer and a condensation polymer.(ii)Choose one condensation polymer and one addition polymer from amongstthe following :nylon, teflon, neoprene, polyester(iii)Write a chemical equation for the reaction involved in the formation of apolyamide.3(i)  la dyu cgq yd ,oa la ?kuu cgqyd es a Hks n iz dV dhft,A (ii)  fuEufyf[kr es a ls ,d la ?kuu cgq yd vkS j ,d la dyu cgq yd dks pq fu;s %  uk;ykWu] Vs ¶ykW u] U;w vks iz hu] iks fy,LVj  (iii)  iks fy,ekbM ds fuekZ .k ls lEcfU/kr jklk;fud vfHkfØ;k fyf[k,A
Search
Similar documents
View more...
Tags
Related Search
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks