Question

5) Which of the following compounds is hydrolyzed the slowest in aqueous NaOH? І п ш IV у E) II A) III B) I C) IV 6) 6) What is the major product when (CH3)2CHCH2CH2Br undergoes the following reaction sequence: (Step 1) Mg, ether (Step 2) CO2 (Step 3) H30+ A) 4-methyl-1-pentanol B) 2-methyl-2-butanol C) 4-methylpentanoic acid D) 3-methylbutanoic acid 7) Diisobutylaluminum hydride can be used to carry out which of the following conversions? A) aldehyde to carboxylic acid B) secondary alcohol to ketone C) carboxylic acid to ester D) ester to aldehyde E) ester to ketone 8) Which of the following amines will react with cyclopentanone to form an enamine? A) (CH3)3CNH2 B) CH3CH2CH2CH2NH2 C) (CH3)3N D) pyridine E) none of the above F) more than one of the above

Answer 1

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7. Option 1 is correct . It reduce ester to aldehyde 5. Option © is correct 1. While options are wrong. NH2 daes not hydrolysed other 1. slowly with aq . Nnoh. 8. To form enamine carbonyl group as it contain —HH₂ de aving group which reacts with 2o amine to foom I enamine. & here no option are Rest of the molecule easily replaced w available to form enamine. or react with nooh, and at higher rate & correct option o in comparision to is bad leaving group. 6. (CH2), CHCM_CH2 B7 mg, cohes (C13),Cucing himger Jozco (Colecu any cote com — (C12 Chcnych - _ correct option is © 4-methyl pentanoic acid