Practice Test-3 Solution Physics

Transcription

1 NEET (ractice aper- ) Sluti. (a) has diesi T, hast ad diesi less.. (d) s a t a t t a t a t t----- () a t a t ractice Test- Sluti hysics t Subtractig = t a t t eliiatig t a a t. d. (b) a d. a () d p x y si gt ta x cs d d x si gt 4. d ta cs. (a) F f f F = g g i =. +. = N. kx 6. (d) w kx k as k k s re wrk is de i secd sprig. 7. (c) a k rt c k r rt k r t = krt wer = F d = a =. = k r t. 8. (a) e eu [cefficiet f restituti] u ' e gh g g Ttal distace = h + e h e h... e h H B- 6/4-46 M, Brahaad Cly, Durgakud, Varaasi; age 4 h e e....e e = h h e e d 9. (c) F 9 x 9 x d 9 x d 4 ( 9 x ) x 9x c, biusly kietic eergy is axiu fr x =. whe 9 x Thus, K.E ax J. (c) g T a T g a g a a a a c =.a g. (b) The bdy will e dw s fricti will be i upward directi. g si g cs a g si f a fr Rllig is withut slippig r.f r f a = r r I r gsi gsi f f f = g/ 6

2 . (d) = N f rtati =. (b) As there is exteral trque ttal agular etu ad ttal eergy is csered. 4. (b) V G G r R V r R R r. stress stress Y (c) Y = strai Y 6. a (d) ta g p p a g h gh a h h d is crrect pti as water will put se pressure at right ed als. d aerage teperature ,,, = thus teperature differece will be i reerse rder thus tie f clig rder is T T T 7. (b) 8. (b) steepess fr cure is less tha. Thus fr l is less tha. Thus pti (b) is crrect. / 9. (d) p = cstat T T. / k k. (b) T rs rs T T T p, keepig lue r cstat. f. (d) Ttal K.E. = RT f f RT RT [ f is degree f freed f xyge ad f is f arg] RT 4 RT = RT NEET (ractice aper- ) Sluti. (a) x = A si wt Whe x = A si t t = T 6 6 Whe x = A Sit = T T T. (c) KA f = a (fr Q) f = a (fr ) KA - f = f KA f = dy 4. (b) particle elcity = / y f x f Wae elcity = f y y f 4f s. (a) as,s t t S after secd bth pulses will cacel their aplitude ad de will be fred. Thus eergy will be kietic ly. 6. (a) E 8x r, E 8 At pit î 7. (b) q = q q t/rc e t / RC e t / RC I e RC R t lg I = lg R RC As graph is startig fr sae pit R is cstat. Sice graph is re bed thus slpe alue decreased thus C icreased. 8. (b) As electric field will exert frce i directi acrss plates, thus etu r elcity alg the plate will be sae thrughut ti f the particle. Thus, cs cs cs cs 9. (c) A B B C q q q q 4 r 4 r 4 r 4r (Assuig surfaces are etallic) r r r r r r r r as rr r r t t B- 6/4-46 M, Brahaad Cly, Durgakud, Varaasi; age

3 . (c) Applig cditi f balaced wheat ste bridge R R R R 4 R R4 R R. (c) Fr steady curret A = cstat A A s. Q p p. (a) Fr Galaeter I, R G R. R 8. R. (a) Due t agetic field trque will be applied bth cils i sae plae. 4. (d) usig Bit - Saart law B = B B [directi it plae] I r. (a) LI Q BA L I I = ML T A 6. (a) iitially iductr will bece shrt circuit. R S, R i,i, i R R R R R i i i 7. (a) u R 4/ 7. 6c / 4/ / u R S iage is i first ediu. 8. (c) Cditi f ttal iteral refracti ccurs at secd refracti. S fr first refracti si4 ( ) si r si( 9 r) ().sir cs r ta r = si r = fr (). / NEET (ractice aper- ) Sluti 9. (a) asr., r, r r r 4 4. (c) s ea life = t = T t N = N e = N N e. 7N e N N S percetage decay = N N N e N = 6% 4. (c) hc i e hc e hc e A B AB 4. (c) AND gate 4. (c) E Eh 44. (a) Light rays ges away after refracti thrugh air bubble iside water s it behaes as ccae lese. 4. (c) Aplitude will be haled I A K.A I I. 4 4 B- 6/4-46 M, Brahaad Cly, Durgakud, Varaasi; age

4 Cheistry 46. Higher perirty grup attached ppsite t duble bds. S bth are E. S pti (d) is crrect 47. Let suppse that chage i teperature is T supplyig 8 J f heat V RT U CVT Wrk de S, = Chage i iteral eergy S crrect aswer is (b). R CV C V R frdiatic NEET (ractice aper- ) Sluti gas 48. Na Ether S pti (d) is crrect. 49. ph lg[h ] S pti (b) is crrect.. All f the will shw geetrical iseris S crrect pti is (d). Rate = k [X] [C] X = k eq [A] [B] S, Rate = k [A] [B] [C]. Reactiity Steric hidrace S crrect pti is (a) [ N] [H ] [NH]. t t t S pti (b) is crrect 4. CN first attack at carb at f carbyl grup, s it is a uclephilic additi reacti S crrect pti is (b). Fe e Fe; E. 6 lt Fe e Fe;E.44 V.. (i) (ii) Fe e Fe ; E?..(iii) (i) (ii) = (iii) S, G G G E E E.6.44 E.88.8 =.77 V S pti (d) is crrect E 6. I Le pair f Nitrge are delcalized i etire rig ad fr a aratic cpud. S it will be least basic because datig electrs (le pair) rig will lse its araticity. S crrect pti is (d) OMgBr Ether CHCHO 7. C6H CH Br Mg C6H CH MgBr C6H CH C CH S pti (b) is crrect MgBr(OH) C 6H CH C CH B- 6/4-46 M, Brahaad Cly, Durgakud, Varaasi; age 4 OH H O

5 NEET (ractice aper- ) Sluti 8. (i) I CH CH C H is re stable tha CH CH CH C H because f hypercjugati. (ii) I CH NH C H ad C H OH structure f this is re stable, CH NH C H (iii) CH O C H is re stable because f resace. B- 6/4-46 M, Brahaad Cly, Durgakud, Varaasi; age is re stable because resatig (i) CH C H CH7 is re stable because f hypercjugatig structures. S crrect pti is (b) O % H SO 4 dilnaoh 9. CH CH HC C H CH C H CH CHO OH HgSO 4 C (Hydrati) (Aldl Re acti) S pti (d) is crrect 6. O zlysis f bezee O O H C C H fred S crrect aswer is (a) 6. Opti (a) is crrect 6. Aical AgNO will gie psitie test with terial alkyes. S crrect pti is (d) 6. Opti (b) is crrect. 64. Lidlr s catalyst yields cis-alkee hydrgeati f alkye. S crrect pti is (b) 6. C-rdiati uber is FCC is S (d) is crrect pti. 66. Le pair Le pair repulsi is strger tha le pair bd pair, ad le pair bd pair is strger tha bd pair bd pair S crrect aswer is (b) 67. Opti (b) is crrect 68. I, cetral at ctai le pair ad bd pair S crrect aswer is (a) 69. Mre electregatie cetral at strger will be acid. 7. Opti (b) is crrect 7. Deac prcess CuCl 4HCl O Cl HO Opti (b) is crrect 7. Cbalt hae c-rdiati 6, s [ C(NH) Cl] Cl s ttal uber f i iizati will be. Opti (c) is crrect 7. H E a E f a b = 9 9 Kcal S pti (c) is crrect 74. Cplexes differ i uber f upaired electrs S, pti (c) is crrect 7. Fr lecular rbital thery Opti (b) is crrect Z Eergy f electric species = Opti (b) is crrect because f iert pair effect 78. Vreal Z, s if Z < the V real < V ideal Videal S pti (b) is crrect S crrect pti is (c)

6 79. pti (d) is crrect 8. Relatie lwerig i apur pressure = Mle fracti f slute S, x B 98 8 M B 8 M B 8 S crrect pti is (c) 8. O the basis f stability f carbcati geerated real f Opti (b) is crrect 8. Equal uber cati & ai are issig S it is schttky effect S crrect pti is (b) 8. KOH NEET (ractice aper- ) Sluti CH CH CH(I)CH CH CH CH(OH)CH CH C C CH CH COOH HO Al O Cl [O] 84. S pti (a) is crrect [B] K, S by puttig alue f [C] K K & K [B] = 76.8% [C] =.7% S crrect pti is (d) S pti (c) is crrect CH COOH CHCOONa = = 9.7 S crrect pti is (c) HCl NaCl 87. Will declrize brie water ad als fr -ebered rig cyclic ahydride. S pti (c) is crrect g f CO ctai.77 g f carb.8 g f H O ctai.4 g f hydrge S calculatig epirical frula 89. (a) satisfy ctet rule 9. +M effect f NH icrease reactiity. Ad M effect f NO decreases reactiity tha bezee S pti (a) is crrect B- 6/4-46 M, Brahaad Cly, Durgakud, Varaasi; age 6

7 NEET (ractice aper- ) Sluti Bilgy 9. b 9. c 9. b 94. c 9. a 96. c 97. d 98. d 99. b. d. d. d. c 4. d. c 6. b 7. d 8. b 9. Bus. c. a. c. b 4. c. a 6. d 7. b 8. d 9. b. d. a. a. c 4. d. d 6. d 7. b 8. b 9. d. d. a. b. d 4. d. c 6. b 7. c 8. a 9. c 4. Bus 4. d 4. a 4. a 44. b 4. c 46. b 47. d 48. d 49. d. c. c. c. b 4. c. c 6. d 7. d 8. d 9. d 6. b 6. d 6. c 6. d 64. b 6. c 66. d 67. d 68. a 69. d 7. c 7. b 7. d 7. b 74. d 7. c 76. c 77. a 78. d 79. d 8. b B- 6/4-46 M, Brahaad Cly, Durgakud, Varaasi; age 7