A2 CIE Chemistry

Cumene can be made by the reaction between

• benzene and propane

• benzene and 2-chloropropane

• methyl benzene and 2-chloropropane

• benzene and 2-methylpropane

Cumene can be made in the laboratory by the action of 2-chloropropane on benzene. The catalyst for this reaction is:

• concentrated phosphoric acid

• platinum

• aluminium chloride

• aluminium sulfate

Benzoic acid can be made from cumene by the action of:

• Hot, conc, KMnO₄

• Cold, dil KMnO₄

• Conc H₃PO₄

• Hot, Acidified, K₂Cr₂O₇

Cumene can undergo substitution reactions with chlorine:

Which set of reagents and conditions would ensure the substitution happens at the alkyl chain?

• Chlorine gas and U.V. radiation

• Chlorine gas and AlCl₃

• Chlorine gas, AlCl₃ and U.V. radiation

• Reflux with potassium chlorate(VII) - KClO₄

How many isomers of monochloro substituted cumene are possible?

• 2

• 3

• 4

• 5

How many isomers of monochloro substituted cumene are possible?

• 2

• 3

• 4

• 5

The reaction mechanism that makes chorine substitute at the benzene ring is:

• electrophilic addition

• electrophilic substitution

• nucleophilic substiution

• radical substitution

Propanoic acid is more acidic than phenol. the correct explanation for this is:

• Phenol has a higher electron density than propanoic acid

• The carboxylic acid group is more electronegative than the phenol group.

• the C=O group in propanoic acid is more electron withdrawing than the benzene ring in phenol.

• The negative charge on the propanoate ion is fully delocalised across the O=C=O group but on the phenoxide ion it is only partially delocalised into the benzene ring.

Propanoic acid is more acidic than phenol. the correct explanation for this is:

• Phenol has a higher electron density than propanoic acid

• The carboxylic acid group is more electronegative than the phenol group.

• the C=O group in propanoic acid is more electron withdrawing than the benzene ring in phenol.

• The negative charge on the propanoate ion is fully delocalised across the O=C=O group but on the phenoxide ion it is only partially delocalised into the benzene ring.

What is the shape of the complex formed when copper(II)sulphate dissolves in water?

• tetrahedral

• linear

• octahedral

• square planar