Secondary School Examination 2025 Science PDF

SECONDARY SCHOOL EXAMINATION-2025 ek/;fed Ldwy ijh{kk&2025 ( ANNUAL / okf"kZd ) SCIENCE (Compulsory) foKku ¼vfuok;Z½...

SECONDARY SCHOOL EXAMINATION-2025 ek/;fed Ldwy ijh{kk&2025 ( ANNUAL / okf"kZd ) SCIENCE (Compulsory) foKku ¼vfuok;Z½ fo"k; dksM % 112 dqy la[;k : 80+24+6 = 110 Subject code: 112 Total Questions : 80+24+6 = 110 ¼ le; % 2 ?kaVs 45 feuV ½ ¼ iw.kkZad % 80 ½ [ Time : 2 Hours 45 Minutes ] [ Full Marks:80 ] ijh{kkfFkZ;ksa ds fy, funsZ'k% Instructions for the candidates: 1. ijh{kkFkhZ 𝑂𝑀𝑅 mÙkj&i=d ij viuk ç'u iqfLrdk Øekad ¼10 vadks dk½ vo'; fy[ksaA Candidates must enter his/her Question Booklet Serial No. (10 Digits) in the OMR Answer Sheet. 2. ijh{kkFkhZ ;FkklaHko vius 'kCnksa esa gh mÙkj nsaA Candidates are required to give their answers in their own words as far as practicable. 3. nkfguh vksj gkf”k;s ij fn;s gq, vad iw.kkaZd fufnZ"V djrs gSaA Figures in the right hand margin indicate full marks. 4. ç'uksa dks /;kuiwoZd ik,¡A 6 Page 27 of 31  Explain the first and second principle focus of convex and concave lenses with the help of ray diagram. 10. Mk;ueks D;k gS\ blds fl)kar vkSj fØ;k dk LoN fp= ds lgkjs o.kZu djsaA 6 What is dynamo? Describe its principles and working with the help of a neat diagram. jlk;u 'kkL=@Chemistry y?kq mÙkjh; ç'u @Short Answer Type Questions ç'u la[;k 11 ls 18 rd y?kq mÙkjh; gSa A buesa ls fdUgha 4 ç'uksa ds mÙkj nsaA çR;sd ç’u ds fy, 2 vad fu/kkZfjr gSA 𝟒×𝟐=𝟖 Question Nos. 11 to 18 are Short Answer Type. Answer any 4 questions. Each question carries 2 marks. 4×2= 8 11. mnkgj.k lfgr fdlh vo{ksi.k vfHkfØ;k dk o.kZu djsaA 2 Describe a precipitation reaction with an example. 12. vk;ksfMu ;qDr ued ds mi;ksx dh lykg D;ksa nh tkrh gS\ 2 Why is the use of iodised salt recommended? 13. euq’; ds mnj esa L=kfor gksus okys 𝐻𝐶𝑙 vEy dh dk;Z&i)fr dk o.kZu djsaA 2 Describe the functioning of 𝐻𝐶𝑙 acid secreted in the human stomach. 14. lar`Ir vkSj vlar`Ir gkMªksdkcZu esa varj fy[ksaA izR;sd dk ,d mnkgj.k nsaA 2 Differentiate between saturated and unsaturated hydrocarbons. Give one example for each. 15. la;kstu vfHkfØ;k dks ifjHkkf’kr djsaA m’ek{ksih la;kstu vfHkfØ;k dk ,d mnkgj.k nhft,A 2 Define a combination reaction. Give one example of an exothermic combination reaction. Page 28 of 31  16. fljdk D;k gS\ blds mi;ksxksa dks crk,aA 2 What is vinegar? Explain its uses. 17. ,’Vhdj.k dh fØ;k fdls dgrs gS\ lehdj.k }kjk le>k,¡A 2 What is the process of esterification? Explain with the help of equation. 18. fMªi flapkbZ O;oLFkk D;k gS\ 2 What is drip irrigation system? nh?kZ mÙkjh; ç'u @Short Answer Type Questions ç'u la[;k 19 ls 20 rd nh?kZ mÙkjh; ç'u gSa A buesa ls fdUgha 1 ç'uksa ds mÙkj nsaA çR;sd ç’u ds fy, 5 vad fu/kkZfjr gSA 𝟓×𝟏=𝟓 Question Nos. 19 to 10 are Short Answer Type. Answer any 4 questions. Each question carries 5 marks. 5×1= 5 19. jklk;fud ca/ku fdls dgrs gS\ ;g fdrus izdkj dk gksrk gS\ mnkgj.k ds lkFk mYys[k djsaA 5 What is chemical bond? How many types of it? Explain with examples. 20. dkcZu ds dqN foy{k.k xq.kksa dk mYys[k djsa rFkk crk,¡ fd dkcZu ds ;kSfxdksa dh la[;k vla[; D;ksa gS\ 5 Mention some unique properties of carbon and explain why the number of compounds of carbon is innumerable? tho foKku@ Biology y?kq mÙkjh; ç'u @Short Answer Type Questions ç'u la[;k 21 ls 28 rd y?kq mÙkjh; gSa A buesa ls fdUgha 4 ç'uksa ds mÙkj nsaA çR;sd ç’u ds fy, 2 vad fu/kkZfjr gSA 𝟒×𝟐=𝟖 Page 29 of 31 Question Nos. 21 to 28 are Short Answer Type. Answer any 4 questions. Each question carries 2 marks. 4×2= 8 21.vek'k; esa ikpd jl dh D;k Hkwfedk gS\ What is the role of digestive juices in the stomach? 22. eNyh] dsapqvk] ePNj vkSj euq’; ds eq[; “olu vaxksa ds uke fy[ksA 2 Write the names of main respiratory organs of fish, earthworm, mosquito and human being. 23. euq"; esa jDr dk f}xq.k ifjlapj.k D;k gS\ 2 What is double circulation of blood in humans? 24. Mk;fyfll dk fl)kar D;k gS\ 2 What is the principle of dialysis? 25. raf=dk ra= ds D;k dk;Z gSa\ 2 What are the functions of nervous system? 26. euq’; esa gksus okys lkekU; ySafxd lapkfjr jksxksa ds uke fy[ksaA 2 Write the names of common sexually transmitted diseases in human. 27. letkr vax ,oa le:i vax ls vki D;k le>rs gSa\ 2 What do you understand by homologous organs and analogous organs? 28. D;k gksxk ;fn ge ,d iks’kh&Lrj ds lHkh thoksa dks lekIr dj nsa\ 2 What would happen if we eliminate all organisms at a trophic level? nh?kZ mÙkjh; ç'u @Short Answer Type Questions ç'u la[;k 29 ls 30 rd nh?kZ mÙkjh; ç'u gSa A buesa ls fdUgha 1 ç'uksa ds mÙkj nsaA çR;sd ç’u ds fy, 5 vad fu/kkZfjr gSA 𝟓×𝟏=𝟓 Question Nos. 29 to 30 are Short Answer Type. Answer any 4 questions. Each question carries 5 marks. 5×1= 5 Page 30 of 31 29. fxYl }kjk “olu fdl izdkj gksrk gS\ lfp= le>k,\ 5 How does respiration take place through gills? Explain with diagram? 30. ikfjfLFkfrd ra= esa mTkkZ dk izokg dSls gksrk gS\ 5 How does energy flow in an ecosystem? Page 31 of 31