Q.

The conditions that are necessary in the preparation of aryl halides from arenes
 

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a

 Presence of halogen carrier
 

b

Absence of sunlight
 

c

Low temperature 

d

All of the above

answer is D.

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Detailed Solution

Aryl chlorides and bromides can be easily prepared by electrophilic
substitution of arenes with chlorine and bromine respectively in the
presence of Lewis acid catalysts like iron or iron(III) chloride.

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