Physics (UP) Board Sample Paper, Class 12th, PDF

 PHYSICS (UP) BOARD SAMPLE PAPER CLASS 12th le; & 3 ?k.Vs 15 feuV iw.kk±d & 70 Time : 3:00 hours 15 minutes...

 PHYSICS (UP) BOARD SAMPLE PAPER CLASS 12th le; & 3 ?k.Vs 15 feuV iw.kk±d & 70 Time : 3:00 hours 15 minutes Total Marks : 70 uksV% çkjEHk ds 15 feuV ijh{kkfFkZ;ksa dks ç'ui= ikb,A VªkalQ‚eZj esa ÅtkZ {k; ds fdUgha nks dkj.kksa dks Li"V dhft, A What is the principle of a transformer? "Explain the working process of step-up transformer by drawing a circuit diagram. Enunciate any two reasons of energy losses in transformer. (v) ,d nwjn'khZ ds vfHk–';d o usf=dk ysl a ksa dh Qksdl nwfj;k¡ Øe'k% 15 lseh o 1-5 lseh gSa A bls vfHk–';d ls 3 ehVj nwj fLFkr ,d oLrq ds fy, Qksdflr fd;k tkrk gSA ;fn oLrq dk vfUre çfrfcEc Li"V –f"V dh U;wure nqjh ¼25 lseh½ ij cus] rc vfHk–';d o usf=dk ds chp dh nwjh Kkr dhft, A The focal lengths of objective and eyepiece lenses of a telescope are 15 cm and 1.5 cm respectively. It is focused on an object 3 m distance from the objective. If final image is formed at the least distance of the distinct vision (25 cm), then find the distance between the objective and eyepiece. 5. (i) /kkrq ds nks xksyksa ds O;kl 6 cm rFkk 4 cm gSA bUgsa leku foHko rd vkosf”kr fd;k x;k gSA xksyksa ds vkos”k ds i`’B ?kuRoksa dk vuqikr Kkr dhft,A Diameters of two spheres of metal are 6 cm and 4 cm. They are charged to the same potential. Find out the ratio of the surface densities of charge on the sphere. (ii) vory lrg ds fy, fn, x, lw= dks LFkkfir djs& a 2 − 1 2 1 = − R v u Establish the given formula for a concave surface. 2 − 1 2 1 = − R v u (iii) la/kkfj= fdls dgrs gSa\ xksyh; la/kkfj= dh /kkfjrk dk O;atd O;qRiUu dhft,A vko”;d fp= cukb,A What is capacitor? Derive an expression of capacitance of the spherical capacitor. Draw necessary diagram. (iv) fdlh /kkjkokgh o`Ùkh; dq.Myh ds v{k ij fLFkr fdlh fcUnq ij pqEcdh; {ks= dh rhozrk dk O;atd izkIr dhft,A Find the expression for intensity of magnetic field produced at a point on the axis of a current carrying circular coil. (v) fo|qr pqEcdh; izsj.k laca/kh ysat dk fu;e fyf[k, ,oa le>kb, fd dSls yst a dk fu;e ÅtkZ laj{k.k fu;e ds vuqdwy gSA Write Lenz’s law regarding electromagnetic induction and explain how Lenz’s law is equivalent to the law of conservation of energy. [k.M ^;* 6. ;ax ds f}&fyLV iz;ksx dh lgk;rk ls noha vnhIr fÝUt dh dsUnzh; fÝUt ls nwjh dk lw= izkIr dhft,A Obtain the formula for the distance of nth order dark fringe from the central fringe with the help of Young’s double-slit experiment. vFkok@OR gkbxsUl rjax fl)kar D;k gS\ bl fl)kUr dk mi;ksx djrs gq, izdk”k ds viorZu dk Lusy fu;e Li’V dhft,A What is the Huygens’ wave theory? Enunciate Snell’s law of refraction of light by using this theory. : [email protected], url : www.motion.ac.in, : 1800-212-1799, 8003899588 | Page # 4 7. p-n laf/k Mk;ksM ds vo{k; ijr ,oa foHko izkphj ij vxz vfHkufr dk D;k izHkko iM+rk gS \ laf/k Mk;ksM dk mi;ksx djds iw.kZ rjax fn’Vdkjh dk ifjiFk vkjs[k cukb, rFkk fn’Vdkjh dh dk;Zfof/k dk mYys[k la{ksi esa dhft,A What is the effect of forward biasing on the depletion layer and potential barrier of a p-n junction diode? Draw circuit diagram of a full wave rectifier using junction diode and briefly mention the working of the rectifier. vFkok@OR cksj ds ijek.kq izk:i ds vfHkx`fgrksa dks fyf[k,A blds vk/kkj ij gkbMªkstu ijek.kq ds cksj d{kk dh f=T;k ds fy, lw= fuxfer dhft,A State the postulates of Bohr’s atomic model. Derive the formula for the radius of the Bohr orbit of hydrogen atom on its basis. 8. ck;ks&lkorZ fu;e fy[ksAa bldk mi;ksx djds ,d /kkjkokgh o`Ùkkdkj dqaMyh ds v{kh; ,d fcUnq ij pqacdh; çsj.k dk O;atd çkIr djsAa State Biot-Savart law. Applying this law obtain expression of magnetic field at a point on the axis of a circular coil carrying electric current. vFkok@OR x‚l dk fu;e fy[ksAa bldk vuqç;ksx dj irys lh/ks vuar yackbZ ds ,d leku vkosf'kr rkj ds dkj.k fdlh fcUnq ij fo|qr {ks= dh rhozrk dk O;atd çkIr djsAa State Gauss law. Applying this law obtain electric field due to an infinitely long thin uniform charged straight wire. 9. la;qä lw{en'khZ dk fdj.k vkjs[k [khafp, rFkk vko/kZu {kerk ds fy, O;atd O;qRiUu dhft, tcfd vafre çfrfcac Li"V –f"V dh U;wure nwjh ij cusAa Draw the ray diagram to show the formation of image by compound microscope and obtain an expression for the magnifying power when final image is formed at least distance of distinct vision. vFkok@OR ukfHkdh; lay;u fdls dgrs gSa \ D;k dkj.k gS fd ukfHkdh; lay;u dsoy mPp rki ,oa mPp nkc ij gh lEHko gS \ What is nuclear fusion? Why is the nuclear fusion possible only at a very high temperature and very high pressure ? Corporate Office :Motion Education Pvt. Ltd., 394 - Rajeev Gandhi Nagar, Kota | | Page # 5  CHEMISTRY (UP) BOARD SAMPLE PAPER CLASS 12th le; & 3 ?k.Vs 15 feuV iw.kk±d & 70 Time : 3:00 hours 15 minutes Total Marks : 70 uksV% çkjEHk ds 15 feuV ijh{kkfFkZ;ksa dks ç'ui= ikb,A 1+2 = 3 (a) Find out the EMF of Zn | Zn+2(1M) || Co+2(1M) | Co cell. Fro this cell E° for Zn+2 | Zn and Co+2 | Co values are –0.76 volt and +0.28 volt respectively and their concentrations are 1 molar. (b) Explain strong and weak electrolytes with examples. (iii) vfHkfØ;k dh vkf.odrk vkSj dksfa V dh ifjHkk"kk nhft,A fdlh çFke dksfa V dh vfHkfØ;k esa 40 lsd.M esa inkFkZ dh lkUærk çkjfEHkd lkUærk dh vk/kh jg tkrh gSA vfHkfØ;k ds osx fLFkjkad dh x.kuk dhft,A 3 Define molecularity and order of the reaction. In a first order reaction, the concentration of substance reduces to half of the initial concentration in 40 seconds. Calculate velocity constant for the reaction. (iv) (a) fuEufyf[kr vfHkfØ;kvksa dks iw.kZ dhft, & 2+1 = 3 − 2− + (i) 2MnO + 5SO 4 3 + 6H → 2− + (ii) 2CrO 4 + 2H → 3+ (b) Cr dk bysDVªkfud foU;kl fyf[k,A (a) Complete the following equations - (i) 2MnO4− + 5SO23− + 6H+ → (ii) 2CrO42− + 2H+ → (b) Write the electronic configuration of Cr3+ 5. (i) (a) eksyj pkydrk o rqY;kadh pkydrk esa D;k vUrj gS\ ;fn BaCl2 dh eksyj pkydrk 104dm−1cm2mol−1 gS] rks bldh rqY;kadh pkydrk Kkr dhft, A 2 + 2 =4 (b) fo|qr jlk;fud rqY;kad vkSj jlk;fud rqY;kad esa D;k vUrj gS \ ;s nksuksa fdl çdkj ,d nwljs ls lEcfU/kr gS\ (a) What is the difference between Molar conductivity and equivalent conductivity? If the molar conductivity of BaCl 2 is 104 dm–1cm2mol–1 then find the conductivity of its equivalent. (b) What is difference between electrochemical and chemical equivalents? How are these two related. (ii) (a) çFke dksfV dh vfHkfØ;k ls vki D;k le>rs gSa\ nks mnkgj.k nsAa 2 + 2 =4 (b) çFke dksfV dh vfHkfØ;k ds osx fLFkjkad ds fy, O;atd çkIr djsAa (a) What do you mean by first order reaction? Give two examples. (b) Obtain an expression for rate constant of a first order reaction. 2− 2− (iii) NiCl4  vk;u vuqpEq cdh; gS tcfd Ni(CN)4  vk;u çfrpqEcdh; gSA la;kstdrk ca/k fl)kUr dh lgk;rk ls le>kb,A 4 2− 2− NiCl4  ion is paramagnetic but Ni(CN)4  ion is diamagnetic. Explain with the help of valence bond theory. Corporate Office :Motion Education Pvt. Ltd., 394 - Rajeev Gandhi Nagar, Kota | | Page # 3 (iv) eksukslSdsjkbM] MkblSdsjkbM rFkk ikyhlSdsjkbM ls vki D;k le>rs gSa \ mnkgj.k lfgr le>kb,A Xywdkst rFkk LVkpZ esa fdl çdkj foHksn fd;k tkrk gS \ 4 What do you know about monosaccharides, disaccharides and polysaccharides? Explain with examples. How can glucose and starch be differentiated? 6. (i) Dyksjksct sa hu ds lkFk gSykstus'ku] ukbVªs'ku] lYQksus'ku] ÝhMsy&Øk¶V~l çfrfØ;k vkSj oqVZ~t&fQfVx çfrfØ;k ds fy, jklk;fud lehdj.k fy[ksAa 1+1+1+1+1=5 Write the chemical equation for Halogenation, Nitration, Sulphonation, Friedel-Crafts reaction and Wurtz-Fittig reation with Chlorobenzene. vFkok@OR gSyks,sYdsuksa esa ,dkf.od vkSj f}vkf.od U;wfDy;ksfQfyd çfrLFkkiu vfHkfØ;k dh fØ;kfof/k le>kb,A 2½ + 2½ = 5 Unimolecular and bimolecular nucleophilic substitution reaction in haloalkanes. (ii) (a) bZFkj dk ,fYdy gSykbM ls fojpu dh fof/k jklk;fud lehdj.k lfgr fyf[k,A 2+3=5 (b) fuEufyf[kr vfHkfØvksa esa 'kkfey lehdj.k fy[ksa (A) jhej&VheSu çfrfØ;k (B) dksYcs dh çfrfØ;k (a) Write the method for preparation of ether from alkyl halides giving chemical equations. (b) Write the equation involved in the following reactions (A) Reimer-Tiemann reaction (B) Kolbe's reaction vFkok@OR dSls çkIr djsxa s & ¼dsoy jklk;fud lehdj.k nhft,½ 1+1+1+1+1 = 5 (a) ,fFky ,Ydksgky ls bZFkj \ (b) fQuky ls csUthu \ (c) ,Fksuky ls ,Fkhu \ (d) Qhuky ls fifØd vEy \ (e) vkblksçksfiy ,Ydksgky ls ,lhVksu \ How will you obtain - (Write chemical equations only ) (i) Ether from Ethyl alcohol ? (ii) Benzene from Phenol ? (iii) Ethene from Ethanol ? (iv) Picric acid from Phenol ? (v) Acetone from Isopropyl alcohol ? 7. (i) fuEufyf[kr ij laf{kIr fVi.kks fyf[k,% 1+1+1+1+1 = 5 (a) bVkMZ vfHkfØ;k (b) jkstsueq.M vfHkfØ;k (c) xsVjesu&dksp vfHkfØ;k (d) ,YMksy la?kuu (e) dsfutkjks vfHkfØ;kA Write short notes on the following : (a) Etard reaction (b) Rosenmund reaction (c) Gatterman-Koch reaction (d) Aldol condensation (e) Cannizzaro’s reaction : [email protected], url : www.motion.ac.in, : 1800-212-1799, 8003899588 | Page # 4  vFkok@OR ,fYMgkbM cukus dh nks fof/k;ksa dk jklk;fud lehdj.k nsrs gq, fyf[k;s rFkk VkWysu vfHkdeZd ,oa Qsgfyax foy;u ds lkFk bldh jklk;fud vfHkfØ;k fyf[k,A 2 +3 = 5 Write two methods for preparation of aldehydes, giving chemical equations and also write its chemical reactions with Tollen's reagent and Fehling solution. (ii) fuEufyf[kr ;kSfxdksa ds lajpukRed lw= fy[ksAa 1+1+1+1+1 = 5 (A) 2&,sehuks,Fksu‚y (B) Vf'kZ;jh O;wfVy ,sehu (C) N&,fFky,Fksukekbu (D) N,N&MkbesfFkyesFksukehu (E) N&,fFkylkbDyksiSuVsukehu Write structural formula of following compounds (A) 2-Aminoethanol (B) Tertiary butylamine (C) N-Ethyl ethanamine (D) N, N Dimethyl methanamine (E) N-Ethylcyclopentanamine vFkok@OR (a) ,uhfyu] ,sfYdy ,sehu dh rqyuk esa de {kkjdh; gSaA ,d jklk;fud vfHkfØ;k nsdj le>kb,A 2+1+1+1=5 (b) fuEufyf[kr jlk;fud vfHkfØ;k ds Øe esa A rFkk B dks igpku dj jklk;fud lw= fyf[k,% NaNo +HCl C H NH C6H5NH2 ⎯⎯⎯⎯⎯⎯ 2 273−278 K →(A) ⎯⎯⎯⎯⎯ 6 5 OH 2 →(B) (c) ,suhfyu dh vuquknh lajpuk cukb,A (d) fuEufyf[kr dks {kkjh; lkeFkZ~; ds ckb;sA (ii) ewy fl)kar ¼lsVa ªy MksXek½ D;k gS\ (iii) tUetkr çfrj{kk D;k gS\ (iv) vkfdZM ikSa/kk vke ds isM+ dh 'kk[kk ij mx jgk gSA vkfdZM vkSj vke ds isM+ ds chp ikjLifjd fØ;k dks vki dSls Li"V djsx a s\ (v) vi?kVu pØ D;k gS\ blds pj.k fyf[k,A Short answer questions-I (i) Explain sex determination in Drosophila ? (ii) What is Central dogma ? (iii) What is innate immunity? (iv) Orchid plant is growing on the branch of mango tree. How would you explain the interaction between orchid and mango tree? (v) What is decomposition cycle? Write its steps. 4. y?kq mÙkjh; ç'u&II 3 × 4 = 12 (i) Lo;qXeu vksVksxSeh vkSj ltkriq"ih ijkx.k~ ds chp dksbZ rhu varj Li"V djsAa (ii) gekjs lekt esa yM+fd;k¡ iSnk gksus ij nks"k dsoy efgykvksa dks fn;k tkrk gS \ crk,¡ fd ;g D;ksa lgh ugha gS\ (iii) viw.kZ çHkkfork dks mnkgj.k lfgr le>kb;sA (iv) ,d fp= dh lgk;rk ls DNA çfr—fr dh çfØ;k dk o.kZu djsAa Short Answer Questions–II (i) Explain any three differences between Autogamy and Geitonogamy ? (ii) In our society, only women are blamed for the birth of girls? Explain why this is not correct? (iii) Explain incomplete dominance with example. (iv) Describe the process of DNA replication with the help of a diagram. 5. (i) i'pfo"kk.kq ¼jsVªksok;jl½ dh çfr—fr dk ,d pØ cuk,a vkSj le>k,a A 3 (ii) uhps fn;s x;s jksxksa dks le>kb;s& 3 (A) lkYeksusyk VkbQh (B) eysfj;k (iii) ekfld /keZ pØ dks ifjHkkf"kr djsa vkSj blds fofHkUu pj.kksa dks fp= lfgr le>k,aA 3 (iv) VªkbdksMekZ D;k gS\ 3 (i) Draw and explain a cycle of replication of a retrovirus. (ii) Explain the diseases given below – (A) Salmonella typhi (B) Malaria (iii) Define menstrual cycle and explain its different stages with diagrams. (iv) What is trichoderma? : [email protected], url : www.motion.ac.in, : 1800-212-1799, 8003899588 | Page # 2 6. (i) fuEufyf[kr ij fVIi.kh fyf[k;s& 1½+1½ = 3 (A) tsy oS|qr ¼bysDVªksQksjsfll½ (B) oj.k ;ksX; fpUgd (ii) vkuqoaf'kdr% :ikarfjr tho D;k gS vkSj blds mi;ksxA 3 (iii) e`rksithoh çk.kh ls vki D;k le>rs gSa\ dksbZ ,d mnkgj.k nhft,A 3 (iv) fuEufyf[kr esa varj Li"V dhft,& 1½+1½ = 3 (A) ÅtkZ çokg (B) vijnkgkjh (i) Write a comment on the following– (A) Gel electrophoresis (B) Selectable marker (ii) What is genetically modified organism and its uses. (iii) What do you understand by saprophytic animal? Give any one example. (iv) Explain the difference in the following– (A) Energy flow (B) Productivity nh?kZmÙkjh; ç'u (Long answer type question) – 7. euq"; ds eknk tuu ra= dk o.kZu dfj,A 5 Describe the human female reproductive system. vFkok@OR nksgjk fu"kspu ¼f}&fu"kspu½ dk o.kZu dfj,A Describe the double fertilization. 8. ekuo thukse ifj;kstuk ¼áweu thukse çkstsDV½ D;k gS \ buds y{; le>kb;sAa 2½ + 2½ =5 What is the Human Genome Project? Explain their goals. vFkok@OR fuEufyf[kr dks Li"V dhft, (i) gkMhZ&osuoxZ fl)kar (ii) vuqdwyh fofdj.k Explain the following- (i) Hardy-Weinberg principle (ii) Adaptive radiation 9. ikfjra= lsok ds varxZr ck