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Haloalkanes and Haloarenes question

2024 · Q144
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Haloalkanes and Haloarenes question

2024 · Q144

NEETChemistryHaloalkanes and HaloarenesMCQ+4 / −1

The following reaction method

NEET 2024 (Re-Examination) Chemistry - Haloalkanes and Haloarenes Question 3 English

is not suitable for the preparation of the corresponding haloarene products, due to high reactivity of halogen, when X is :

  1. A
    F
  2. B
    I
  3. C
    Cl
  4. D
    Br
View written solutionFree

Correct answer: A

$\bullet$ Aryl chlorides and bromides can easily be prepared by electrophilic substitution of arenes (toluene) with Cl$_2$ and Br$_2$ respectively in the presence of Lewis acid catalyst (Fe in dark).

$\bullet$ Reaction with I$_2$ is reversible and requires the presence of oxidising agent.

$\bullet$ Corresponding fluoroarene is not prepared by this method due to high reactivity of fluorine. Hence, ‘X’ is F.

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