1. Tardigrade
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  3. Chemistry
  4. Chlorobenzene is ...... reactive than benzene towards electrophilic substitution and directs the incoming electrophile to the ...... position.

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Q. Chlorobenzene is ...... reactive than benzene towards electrophilic substitution and directs the incoming electrophile to the ...... position.

Delhi UMET/DPMTDelhi UMET/DPMT 2009

Solution:

$-Cl$ group $(-7)$ of chlorobenzene being deactivating, deactivates the benzene nucleus towards electrophilic substitution.
Hence, chlorobenzene is less reactive as compared to benzene towards electrophilic substitution.
Moreover chlorobenzene has the following canonical forms:
From the above, it is clear that $Cl$-atom increases electron density at ortho and para-position.
Thus, it directs the incoming electrophile to the ortho/para position.

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