Question 1

Bromine reacts more readily with phenol than with benzene. This is because the

  A  

benzene ring in phenol is more susceptible to nucleophilic attack

  B  

benzene ring in phenol is deactivated because the oxygen of the OH group is very electronegative

  C  

lone pair of electrons on the oxygen atom in phenol overlap with the  delocalised electrons in the benzene ring

  D  

lone pair of electrons on the oxygen atom enable phenol to act as an

electrophile

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Question 2

The benzenediazonium ion, C6H5N2+, is an intermediate in the preparation of azo dyes.

In the formation of an azo dye, the benzenediazonium ion is

  A  

an electrophile

  B  

a nucleophile

  C  

a carbocation

  D  

a substituent

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Question 3

The benzenediazonium ion, C6H5N2+, is an intermediate in the preparation of azo dyes.

The temperature of the aqueous reaction mixture must be kept below 10°C to prevent the benzenediazonium ion being converted into

  A  

benzene

  B  

nitrobenzene

  C  

phenylamine

  D  

phenol

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Question 4

Which reaction does not occur?

  A  

C6H5COOH + NaOH ➔ C6H5COONa + H2O

  B  

C6H5OH + NaOH ➔ C6H5ONa + H2O

  C  

2C6H5COOH + CaCO3 ➔ (C6H5COO)2Ca + CO2 + H2O

  D  

2C6H5OH + Na2CO3 ➔ 2C6H5ONa + CO2 + H2O

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Question 5

Which compound is produced when 1-phenylethanol reacts with acidified potassium dichromate(VI)?

  A  

C6H5CH2CH2OH

  B  

C6H5CH2CHO


  C  

C6H5COCH3

  D  

C6H5CH(OH)CH3

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Question 6

How many isomers containing a benzene ring are there with the molecular formula C6H3(NO2)2OH?

  A  

4

  B  

5

  C  

6

  D  

7

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