78, iis tt Sony ‘A naturally occurring this constitution ? i Substance has Ne coin sown below. How many may have = cic cHeHcircH, 6 @ 209,36) 200,30) (© 2), 3¢8) ‘The total number of stereoisomer posi oa @ 2), 300 le for 2, 3-dichloro butane @2 3 Os fare Which ofthe following structre isnot meso-2,3-butaneial? CHy On CH ie it ‘OH ce CH, He 4 OH. CH, ern: OH #; © H—}—a, @ HHO on oa on Gi ‘A solution of optically active 1 phempethanal racemes in afd aqueous medium. is jue to (@) enolization () carbonium ion formation (© carbanion formation (@ reversible oxidation-reduction ‘The most stable conformation of ethylene glyco is (@) Anti (©) Gauche (© Partially eclipsed (€) Fully ecipaed Py H u—t—on wo cx, Br HL i CH, Calls ie ‘The molecules represented by the above two arate He (a) identical es Ean (©) diastereomers it = @, —No, @, The c ler of priority of groups -SCHs ().— NOg. : Te aa a ts ei @ Lm, 1,V a TN, a (© 1,1V, 1,01i CHEWSTRY Free orca ration at C-2 and C-3 ofthe compound given: arm o39 oy eee Gis @ 28,35 25.38 20, Ainonget the faleing mio acs Gs om oe | NH, @ mefo# oot 1. ich of teeing la meso compound? Gs Gi, — CH H a ae (@ Hr © @) Allof these City HH, (OH '82. Predict stereochemistry of product when d and Lamine reacts with f-acid: (@) Diastereomers (b) Meso (© Racemic @ Pure Enantiomer 79. ‘The conf 25,38 @ 2R,3R resented by : enantiomer is rep 5 Sater eOH o Mh City coon @ HC NH, 83. How many chiral center (excluding N centres) are there in morphine? HO, tH Ho’ @s4 Or @6 (@ More than 6 ‘84. Which dimethyleyclobutane is optically ative ? (@) eranst,2 ©) aist,2 (© trans-1,3 © cis:,3 85, Which ofthe follwing isthe enantiomer ofthe compound shown below ? Me ——ar BH Me——on E 87 90, a, ald er Oe o3 0 following compounds ae bes desrtey © comers (OT NHOWCH and Sone (@ enantiomers Koren, (diastereomers (0 noe sereoisomess ) conformational isomers (differing by singe : (0 ona ae gt a at i ‘Cahn-Ingold-Prelog system ‘decreasing priority according to the TOUGH: “GLB -ci,cite (@)2>3>1 QS8S> eye 1 {@) No estimate of K can be made What isthe relationship between the two structures shown ? ce ae @) Constitutional isomers ©) Stereoisomers 3 Different leawing of the same conformation ofthese nmpound ferent conformation ofthe same compound oe ae‘Foncanic crevistey ee ‘92. Which ofthe following tarements is true? {@) van der Waals’ strain in i, 2-dlmethyigcopm™s Yan aered stability relative tthe trans isomer (@) Cyeohexane gives off more heat per CH ouP °° Feat source of san in the boat conformation of cyclohexane is angle strain Remmi cin tone oa seombey (a) Isomer (8) is coo) pane isthe principal reason for 1g bummed in ai than any oth, (@ Ph—NO—CH,OH () Ph—CH, —NO2 © Ph—NA—COsH ove ‘94, Which ofthe folowing wil not show geometrical isomerisn G@ CH, —C = CHC, — Hs © GH, —GI—Gi= CH— CHa — Ci, ba, Gi, (@ cH, —CH =H GH, (cH, —CH, — CH =CH— CH, — cH, The wo compounds shown below are: ae (@ diastereomers (6) enantiomers (¢) epimers (96. ‘The molecular formula of diphenylmethane, ©-2O + isCithe How many structural isomers aré possible when one of the hydrogen is replaced by « @ regiomers chlorine atom ? @s 4 o8 @7 97. Correct configuration of the following molecule is: Hs @ 25,38 () 28,38 © 28,38 @ 2R,3R 98. Maximum enol content isin : aA ° aX, ee 300+ 101. 102 103. 104 105. 106. 107, 108, 109, ‘which of the following will hay Giructural & Stercoisomeris re 7 {@) 2-chlorobutane OMe of the serecisomer mess? (9 20-tehoopene 2 9ichrbane ‘The correct decreasing order inthe ent cong POPE aid @irt>0 Ons © om Total number of stereoisomers of he compos) M2 H>E > m>1 ar donne ‘otal number of stereoisomers of the 13.4? @o 1 ? iorosrdoherae i Total number of stereoisomers of the compousy Bescractee oe ot ou cme ‘Total number of stereoisomers of the com, . al ee oun 24 eorcepane In which of the following keto form is more dominating than ena foe @ o © @ allofihese ‘Among the following compounds which wil give maximum enol content in solution ° ° 9 ° : i M1 " t @ CH; —C—CH,—C—CsHls (0) CH, —C—H —C—CHty ° ° IL i (© CH, —C—CH,—CH,—CH, —(@ GH, —C—cH, —CO0CH, fe Longecion © containing 6g of (+) 2butanal and 4g of f @ © we © ct 0 Calculate enantiomeric excees of mixture © -2dutanol. () 10% 20% (aon Which ofthe following pair represent ai of datemamess? (@) Meso tartaric acid and () tartaric acid @3% a reili ‘ORGANIC CHEMISTRY fori jee oe a= one a }—H ) HO——H m4 ae or} ae Hip - Hy nt H ee In and ot apo a ee ea ay (@ Alof these 110. The stereochemisyof his moledl is: @ 1R,3R ©) 18,35 © 18,38, @ 15,3R 411. Pure (6)-2-butanol has a specific rotation of +13.52 degrees. A sample of 2-butano! ‘prepared in the lab and purified by distillation has a calculated specific rotation of +6.76 ‘degrees. What can you conclude about the composition ? (2) 50% (S), 50% impurity () 50% (8), 50% (R) (© 50% (8), 50% racemic (@ some other mixture 112. Determine the absolute configurations of the chiral centres inthe following compound. jb=S —@)a=Rb=R (©) a=S; b-S @a 113. 114. ‘otal numberof stereoisomers possible for following compound is on = CH—cH,CH, =ch, @s ©) 16 a © 32 ‘Which is the correct structure of -gyeeraldehyde ? oe Ho H H,0H for 2 BHO FO. non (@ Alofthese HoH Gio a atin Bret 8 Sereobemern Le e —CH,— CH, ¢— 16 HOS a? 4 which conformer of above compou Uonsidr conformer across ce) st sable @ ag a (b) Gauche ae b cal, -on © Falepued (Party elie H OH HO a io 116 HO HHO oops cHo UP —cH,0n Tae ee Rs (0) & @) Configuration of above cabohyirtes, © @4 OF lene? pig it) 118, Which ofthe following compound can sow sega tomer <2? ec co" ucts a re + ® < F Et ce @ Semel as om eC Et cu, Nay 119, Which ofthe following structure represent mes-compound ? Mey, put ee Lee ot Me ora, ee Z aH08 ae wf Tn © 1 © Me7 Hi CoH 1 20, ae a : How many fepresentations of lac ai re pase in cher projection (18D? ay, 28 ow @ Total numberof ster @s @2 4 oslil 4122, The number of stereoisomers formed by the RGANIE CHEMISTRY fori i oo i wv ‘ch, A given compound is @3 @s 4 428, Which ofthe following compound doesnot undergo Pase- catalyzed exchange n,0 even though it has an a-hydrogen? * Og Z 7 i ‘ 22, Prodi he ‘ong time ot ‘densify the product formed inthe above reaction: 2 1D @ p. ® > oO iz D © p. (d) None of these t “5 126. 7. 18. 129, 180, a trical & Stereisomerian lf ‘ig-methyl-2-cyclohexenone = 3 whic eS wh COS Sts50 "oN ect det oh OO Oy@ ge when it @ Hills () Hy 1 0 q ats OHH, o o ro) ‘The tautomer of His: @t py me (© both Tand I (@) none of these Ha 4B Hy In the enolizaton ofthe given molecule the Hatom involied it (yeas @) BH © rk (@) cannot be enolized eS ‘Among the given structure which can exhibit tassomerism ? Kaisaty (b) only (@ Monty. (@) none of these , co Che SS . SS Hen tertiary may tone ony eth @ @ ave} ‘ORGANIC CHEMISTRY for I1Tjee is more sable me. = she eo utrer hih “0 ne (@ HONE OF these 131. = ee ay w erect aby order of he ven antes eo ens oboe geneween uate mt @U>U>t -O-C- Cuneta ordeal gies econ is Gifetual& Sterecsomerany wan CHs. ci i H :0| ov” product 1e product of this reaction shouldbe ‘The product of this reaction should be p GH @ ik as oY CH ° io Di (@) Allof these Sistem @mon>t @U>i>m @t>m>1 ae Pease. ‘i : \ \ = x 2s 137. © & QO 133. = [6 6 5 lees oad x a 336 Ht ‘Among the given compounds, the correc oder of nl content i E =—=([ ] @izt>M OW>0>1 Ousisn @n>m>1 1H coor Ee eee eee yey ot Gy ses m3 2>y OE o. a ‘Among the given compounds, the correct order of enol contents : a4, se ON > @tet>m @iletst @l>iom. ou>m>1 Lee aes IPSC, epresent ena content) ‘ if 19, Re commrter os: A Sees Gsryss, @y>x>z “e>a>y © © ‘Among the given compounds, the ext oder of enol contents Or Ce for Outen mats! Wain @U>t>m 135, ee ©, ay Se aa! ‘Among the given ketone, the one which doesnot enoize ie i 0c no endl © (@) none of these above compound? How many geometrical isomers are possible fr 98 aa (9s os‘141. Which ofthe following compound willnot show geometrical fomerism 208 o br Br @ — eee Choose the comet relon berween andy? @b=b hob Ohch 143. Choose the caret relaton berween andy? hob ~Ohh @bh (@, andl cannot be compare. CH, =CH-CH=CH-cH=cH, How many geometrical isomers are posible fr this compound? oh ws @s es CH, -CH = ¢-¢ =cH-cH, if ow many geometric somes reps fc tino? (a) 2 4s ws oF @6 CH, -cH Sie: How many geomerieal anes cihicompunda pose? @2 03 os « yon R R HO, ehey oRGANI CHEMISTRY forte gia Gtractural& Stereoisomerismy aa 107 cy axsof ormmeny @dinl G aor these Pe een a0 oat acive i 0-H Cly oye, : 5 CH CH 0-Cliy cH, rc Aids : 7 oS ce w ye ths Cs o 18s. sang gcntontin fn) 8 we @ . " gap, Which lowing omar center of soy? oss ee (OBO) acer ee {@) Structural isomer © Mena! a owt 7 3 eH : @ | meas Se Se b