Which of the following undergoes electrophilic substitution reaction?
A
benzene
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B
alkyl halides
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C
aldehydes and ketones
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D
alkenes
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Solution
The correct option is A benzene
Benzene's ring is thermodynamically very stable because of the pi molecular orbital. The benzene ring is very stable because of its delocalised electrons. It is because of this that it doesn't usually undergo addition reactions as it would disrupt the delocalisation and therefore will reduce its stability.