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Worksheets25.2a Electrophilic substitution reactions of benzene
Total questions: 8
Worksheet time: 4mins
What is an electrophile?
A species that takes part in a reaction by donating a lone pair of electrons
A species that takes part in a reaction by accepting a lone pair of electrons
A species with a positive charge that takes part in a reaction
What is electrophilic substitution?
A substitution reaction in which an electrophile is substituted for the electrons in the benzene ring
A substitution reaction in which the benzene ring is attacked by a lone pair of electrons from an electrophile
A substitution reaction in which an electrophile is attacked by the electrons in the benzene ring
What are delocalised electrons?
Electrons that are not attached to any of the atoms in a molecule
Electrons that are shared between more than two atoms in a molecule
Electrons that are not attached to any one particular atom but free to move over all the atoms in a molecule
What is a pi bond?
A covalent bond formed by the sideways overlap of p-orbitals
A covalent bond formed by the end-to-end overlap of p-orbitals
A covalent bond formed by the overlap of s-orbitals
What is a nitronium ion?
A negative ion formed by a nitrating mixture of concentrated nitric and sulfuric acids, which acts as an electrophile
A positive ion formed by a nitrating mixture of dilute nitric and sulfuric acids, which acts as an electrophile
A positive ion formed by a nitrating mixture of concentrated nitric and sulfuric acids, which acts as an electrophile
What is acylation?
Substitution of one of the hydrogen atoms of a benzene ring by an acyl group from an acyl chloride
Addition to the benzene ring of an alkyl group from a halogenoalkane
Addition to the benzene ring of an acyl group from an acyl chloride
What is a Friedel-Crafts reaction?
An electrophilic substitution reaction
A reaction to form a C-C bond to an aromatic ring
A reaction involving a Lewis acid
What can happen if benzene is reacted with nitric acid above 50 degrees Celsius?
1,3-dinitrobenzene is formed
The mixture might form TNT and explode
The benzene is hydrogenated to form cyclohexane
