Quiz - Chemistry Benzene Substituents | Chemistry of Benzene Substituents

1

Which of the following types of reactions corresponds to the reaction between toluene and Br₂ under photolytic conditions?

Electrophilic addition

Electrophilic substitution

Radical addition

Radical substitution

Radical process via an initiation step to activate Br₂ then propagation steps. A hydrogen atom is substituted by a bromine

Concepts related to this Question

Reactivity of Methylbenzene

2

Which of the following statements about the reactivity of toluene is correct?

Oxidation of toluene with aqueous KMnO₄ gives benzoic acid

Reaction of toluene with Br₂ in the presence of FeBr₃ gives 2- and 4-bromotoluene

The methyl substituent is relatively acidic (pKa ~ 41) and can be deprotonated with a strong base

All of the above

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Benzylic Oxidation and Reduction Halogenation of Benzene Reactivity of Methylbenzene

3

Which of the following types of reactions corresponds to the reaction between bromobenzene and NaNH₂/ NH₃?

Nucleophilic aromatic substitution

Electrophilic aromatic substitution

Addition-elimination

Radical substitution

Nucleophilic aromatic substitution through benzyne intermediate:

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Nucleophilic Aromatic Substitution

4

Which of the following statements about phenol is correct?

PhOH behaves as a typical alcohol

PhOH reacts with NaOH to give sodium phenoxide

A keto-enol equilibrium exists with PhOH and the keto form is favored

All of the above

There is a keto-enol equilibrium with phenol but the enol form is favored by aromaticity. The proton of the hydroxy function is acidic because the corresponding anion is stabilized by resonance. NaOH reacts with phenol to give sodium phenoxide

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Properties and Reactivity of Phenol

5

Which of the following statements about aniline is incorrect?

Aniline is a primary amine

Reaction of PhNH₂ with MeCOCl gives the amide PhNHCOMe

Treatment of PhNH₂ with NaNO₂ and aqueous HCl gives the diazonium cation PhN₂⁺

None of the above

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Primary, Secondary, Tertiary, Quaternary in Chemistry Arenediazonium Salts

6

Which of the following statements about the diazonium cation PhN₂⁺ is correct?

Coupling of PhN₂⁺ with phenol occurs with loss of N₂

During the Sandmeyer reaction, PhN₂⁺reacts with NaCN to give cyanobenzene

PhN₂⁺ is hydrolysed in water to phenol

All of the above

Hydrolysis of arenediazonium salts:

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Quiz - Chemistry Benzene Substituents | Chemistry of Benzene Substituents

Organic Chemistry 3 - Quiz - Chemistry Benzene Substituents