Academic Help Online

Question 1 How many possible trisubstituted derivatives C6H3X2Y can be obtained from the meta disubstituted benzene C6H4X2? (Ignore directive effects of the substituents X and assume that all positions on the ring are accessible to the reagent Y+).Answer a.oneb.twoc.threed.four1 points Question 2 m-Bromoaniline is: Answer a.1b.2c.3d.4e.51 points Question 3 Which reaction gives the compound shown as the major product? Answer a.1b.2c.3d.41 points Question 4 What is the IUPAC name of the compound shown? Answer a.1-Benzyl-4-methyl-1-pentanolb.1-Benzyl-5-methyl-2-hexanolc.1-Benzyl-3-isopropyl-1-propanold.5-Methyl-1-phenyl-2-hexanole.2-Methyl-5-hydroxy-6-phenylhexane1 points Question 5 Which of the compounds shown below is aromatic according to Hückel’s rule? Answer a.A onlyb.B onlyc.C onlyd.A and Be.A and C1 points Question 6 Chlorination of nitrobenzene (C6H5NO2) under conditions of electrophilic aromatic substitution occursAnswer a.faster than chlorination of benzene and gives a mixture containing mostly o- and p-chloronitrobenzene.b.faster than chlorination of benzene and gives mostlym-chloronitrobenzene.c.slower than chlorination of benzene and gives a mixture containing mostly o- and p-chloronitrobenzene.d.slower than chlorination of benzene and gives mostly m-chloronitrobenzene.1 points Question 7 Which one of the following is not a resonance form of the others? Answer a.1b.2c.3d.4e.51 points Question 8 What is the correct structure of cyclohexylbenzene? Answer a.1b.2c.3d.41 points Question 9 In which series are the carbon-carbon bond lengths arranged in the correct order from shortest to longest?Answer a.Benzene

READ ALSO :   Medical Sciences (Anatomy, Physiology, Pharmacology etc.)