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Question
Assertion: Aryl iodides can be prepared by reaction of arenes with iodine in the presence of an oxidising agent.
Reason: Oxidising agent oxidises I2 into HI.
Options
Assertion and reason both are correct and reason is correct explanation of assertion.
Assertion and reason both are wrong statements.
Assertion is correct but reason is wrong statement.
Assertion is wrong but reason is correct statement.
Assertion and reason both are correct statements but reason is not correct explanation of assertion.
Solution
Assertion is correct but reason is wrong statement.
Explanation:
Oxidising agent like \[\ce{(HIO3)}\] converts \[\ce{HI}\] to \[\ce{I2}\], otherwise \[\ce{HI}\] may reduce aryl halide to arenas.
\[\ce{5HI + HIO3 –> 3H2O + 3I2}\]
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RELATED QUESTIONS
How the following conversion can be carried out?
Benzene to 4-bromonitrobenzene
Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho and para halo compounds. The reaction is ______.
Assertion: In monohaloarenes, further electrophilic substitution occurs at ortho and para positions.
Reason: Halogen atom is a ring deactivator.
Give reason for the following:
During the electrophilic substitution reaction of haloarenes, para-substituted derivative is the major product.
Assertion (A): Chlorobenzene is resistant to electrophilic substitution reaction.
Reason (R): C-Cl bond in chlorobenzene acquires partial double bond characters due to resonance.
Explain why the electrophilic substitution reactions in haloarenes occur slowly and require more drastic conditions as compared to those in benzene.
