haloalkanes & arenes

Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho and para halo compounds. The reaction is

• Electrophilic elimination reaction

• Electrophilic substitution reaction

• Free radical addition reaction

• Nucleophilic substitution reaction

Which reagent will you use for the following reaction? CH3CH2CH2CH3 ⎯⎯→ CH3CH2CH2CH2Cl + CH3CH2CHClCH3

• Cl2/UV light

• NaCl + H2SO4

• Cl2 gas in dark

• Cl2 gas in the presence of iron in dark

Which of the following is an example of vic-dihalide?

• Dichloromethane

• 1,2-dichloroethane

• Ethylidene chloride

• Allyl chloride

The position of –Br in the compound in CH3CH=CHC(Br)(CH3)2 can be classified as ____________.

• Allyl

• Aryl

• Vinyl

• Secondary

Chlorobenzene is formed by reaction of chlorine with benzene in the presence of AlCl3. Which of the following species attacks the benzene ring in this reaction?

• Cl–

• Cl+

• AlCl3

• [AlCl4]–

Ethylidene chloride is a/an ______________.

• vic-dihalide

• gem-dihalide

• allylic halide

• vinylic halide

A primary alkyl halide would prefer to undergo _____________.

• SN1 reaction

• SN2 reaction

• α–Elimination

• Racemisation

Which of the following alkyl halides will undergo SN1 reaction most readily?

• (CH3)3C—F

• (CH3)3C—Cl

• (CH3)3C—Br

• (CH3)3C—I

Which is the correct IUPAC name for CH3-CH(C2H5) -CH2-Br?

• 1-Bromo-2-ethylpropane

• 1-Bromo-2-ethyl-2-methylethane

• 1-Bromo-2-methylbutane

• 2-Methyl-1-bromobutane

What should be the correct IUPAC name for diethylbromomethane?

• 1-Bromo-1,1-diethylmethane

• 3-Bromopentane

• 1-Bromo-1-ethylpropane

• 1-Bromopentane