General Organic Chemistry PYQs Set 11 (PDF)

Set 11 of 25 · Questions 301-330 of 724

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Mere Teacher · Previous Year Questions JEE Main Chemistry · General Organic Chemistry · Set 11 (Q301-330)
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301. $The number of structural isomers possible from the molecular formula C3H9N is :$ (1) $4$ (2) $5$ (3) $2$ (4) $3$ 302. $Which among the given molecules can exhibit tautomerism?$ (1) $III only$ (2) $Both I and III$ (3) $Both I and II$ (4) $Both II and III$ 303. $The increasing order of the p K_{a} values of the following compounds is:$ (1) $C < B < A < D$ (2) $B < C < D < A$ (3) $D < A < C < B$ (4) $B < C < A < D$ 304. $Arrange the following in increasing order of stability$ (1) $5 < 4 < 3 < 1 < 2$ (2) $4 < 5 < 3 < 1 < 2$ (3) $1 < 5 < 4 < 3 < 2$ (4) $5 < 4 < 3 < 2 < 1$ 305. $The major product for the following reaction is :$ (1) (2) (3) (4) 306. $Choose the correct statement regarding the formation of carbocations A and B given :-$ (1) $Carbocation B is more stable and formed relatively at faster rate$ (2) $Carbocation A is more stable and formed relatively at slow rate$ (3) $Carbocation B is more stable and formed relatively at slow rate$ (4) $Carbocation A is more stable and formed relatively at faster rate$ 307. $In the following carbocation; H/ C H_{3} that is most likely to migrate to the positively charged carbon is$ (1) $C H_{3} at C-4$ (2) $H at C-4$ (3) $C H_{3} at C-2$ (4) $H at C-2$ 308. $The compound CHCI = CHCHOHCOOH with molecular formula C4H5O3Cl can exhibit$ (1) $geometric, optical, position and functional isomerism.$ (2) $geometric. optical and functional isomerism only$ (3) $position and functional isomerism only$ (4) $geometric and optical isomerism only$ 309. $A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following?$ (1) $+R effect of - CH_{3} groups$ (2) $-R effect of - CH_{3} groups$ (3) $Hyperconjugation$ (4) $-I effect of - CH_{3} groups$ 310. $Which of the following can be used as the halide component for Freidel -Crafts reaction$ (1) $Isopropyl chloride$ (2) $Chlorobenzene$ (3) $Bromobenzene$ (4) $Chloroethene$ 311. $Given below are two statements : Statement I : Tropolone is an aromatic compound and has 8 π electrons. Statement II: π electrons of > C = O group in tropolone is involved in aromaticity. In the light of the above statements choose the correct answer from the options given below:$ (1) $Statement I is true but Statement II is false$ (2) $Statement I is false but Statement II is true$ (3) $Both Statement I and Statement II are false$ (4) $Both Statement I and Statement II are true$ 312. $Compound(s) that on hydrogenation produce(s) optically inactive compound(s) is (are)$ (1) (2) (3) (4) 313. $The increasing order of pK_{b} values of the following compounds$ (1) $I < II < IV < III$ (2) $I < II < III < IV$ (3) $II < I < III < IV$ (4) $II < IV < III < I$ 314. $Which of the following compounds will produce a precipitate with A g N O_{3} ?$ (1) (2) (3) (4) 315. $Which of the following is least reactive in a nucleophilic substitution reaction ?$ (1) $(CH3)3 C-Cl$ (2) $CH2 = CHCl$ (3) $CH3CH2Cl$ (4) $CH2 =CHCH2Cl$ 316. $In a SN2 substitution reaction which one of the following has the highest relative rate ? R — Br + Cl- DMF R — Cl + Br-$ (1) $(CH3)3 C — CH2Br$ (2) $CH3CH2Br$ (3) $CH3CH2CH2Br$ (4) $(CH3)2 CH — CH2Br$ 317. $The number of sp and s p^{2} carbon in hepta-1, 3-dien-5yne, respectively, are$ (1) $2,4$ (2) $4,3$ (3) $2,2$ (4) $2,5$ 318. $Correct statements for the given reaction are: (A) Compound B is aromatic (B) The completion of above reaction is very slow (C) 'A' shows tautomerism (D) The bond lengths of C - C in compound B are found to be same Choose the correct answer from the options given below.$ (1) $B, C and D only$ (2) $A, B and C only$ (3) $A, C and D only$ (4) $A, B and D only$ 319. $Which type of isomerism is shown by 2,3-dichlorobutane ?$ (1) $diastereomerism$ (2) $optical-isomerism$ (3) $geometric-isomerism$ (4) $structural-isomerism$ 320. $The number of isomers in C_{4} H_{10} O will be$ (1) $7$ (2) $8$ (3) $5$ (4) $6$ 321. $The strongest acid from the following is$ (1) (2) (3) (4) 322. $Designate whether each of the following compounds is aromatic or not aromatic.$ (1) $a, c, d, e, h aromatic and b, f, g not aromatic$ (2) $b, e, f, g aromatic and a, c, d, h not aromatic$ (3) $a, b, c, d aromatic and e, f, g, h not aromatic$ (4) $e, g aromatic and a, b, c, d, f, h not aromatic$ 323. $Reaction of trans 2-phenyl -1 - bromocyclopentane on reaction with alcoholic KOH produces:$ (1) $2-phenylcyclopentene$ (2) $1-phenylcyclopentene$ (3) $3-phenylcyclopentene$ (4) $4-phenylcyclopentene$ 324. $The hyperconjugative stabilities of tert-butyl cation and 2-butene, respectively, are due to$ (1) $σ\to p (empty) and σ\to π* electron delocalisations.$ (2) $σ\to σ* and σ\to π electron delocalisations.$ (3) $σ\to p (filled) and σ\to π electron delocalisations.$ (4) $p (filled) \to σ* and σ\to π* electron delocalisations.$ 325. $he least acidic compound, among the following is:$ (1) $B$ (2) $D$ (3) $A$ (4) $C$ 326. $Identify the compound, which has maximum number of no bond resonance structures.$ (1) (2) (3) (4) 327. $The synthesis of 3-octyne is achieved by adding a bromoalkane into a mixture of sodium amide and an alkyne. The bromoalkane and alkyne respectively are :$ (1) $BrCH2CH2CH2CH2CH3 and CH3CH2C\equivCH$ (2) $BrCH2CH2CH3 and CH3CH2CH2C\equivCH$ (3) $BrCH2CH2CH2CH2CH3 and CH3C\equivCH$ (4) $BrCH2CH2CH2CH3 and CH3CH2C\equivCH$ 328. $Which technique among the following, is most appropriate in separation of a mixture of 100 mg of p-nitrophenol and picric acid ?$ (1) $Steam distillation$ (2) $2-5 ft long column of silica gel$ (3) $Sublimation$ (4) $Preparative TLC (Thin Layer Chromatography)$ 329. $The number of possible isomeric products formed when 3-chloro-l-butene reacts with HC1 through carbocation formation is.........$ 330. $The total number of stereoisomers that can exist for M is$