1-6 ans. detail
以ã使ç¨è¨ç®æ©(æ··åé¡) whas tie o.rrek ,ä¸ å ±3é 第1é 1.é¸æé¡(å®é¸, Each 2%, Total: 40%) phonn ank the following substituents in order of priority (from highest to lowest priority). () -CH-CH2, II)-CN, (Im)-CH2NH2, (IV) -CH2Br (a) 1 > 11 > Ill > IV, (b) II > â ¢ > I > 1, (c) IV > â ¡ > l > III, (d) ly>MI>M>1 2) Which of the following reagents effectively cleaves carbon-carbon double bonds? (a) Br2 and light, (b) meta-chloroperoxybenzoic acid, (c) Os04 followed by H202, (d) Os followed by (CH3)28. Which of the following compounds is likely to adopt a planar.conformation? 4) (Rank the following compounds in order of increasing oxidation level (from the highest to lowest) T) CH3CH20H, (IT) CH3CHO, (III) CH3CO2H, (IV) CH3-CHs (a)1>11 > 111 >IV, (b) III > â ¡ > I> IV, (c) II > 111 > 1 >IV, (d) 111 > â ¡ > IV > 1. 5) Catalysts alter the kinetics of a reaction by: (a) Making the products more stable, (b) Making the reaction more exothermic, (c) Lowering the energy of activation for the reaction, (d) Providing a source of free radicals to initiate a reaction. 6) Which of the following compounds is the strongestacid? (a) CHOCCH2CH, (b) CHCH202CCH,CO,CHh,CH3, (c) CH,CH,0,CCH2CH CO,CHhCH3, (d) CH,CO CH CH. Which of the following isomers of CgHoNO is the weakest base? (a) oraminoacetophenone. (b) m-aminoacetonhenone. (G n-aminoacetonhenone, (d) acetanilide.