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Haloalkanes and Haloarenes — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryHaloalkanes and Haloarenes1 Mark
MCQ
Which of the following statement is not correct?
  • A
    Chlorobenzene is more reactive than benzene towards electrophilic substitution.
  • B
    C−Cl bond in chlorobenzene is less polar than CHCl3​.
  • C
    Chlorobenzene is less reactive than CHCl3​.
  • D
    In chlorobenzene further substitution takes place at ortho and para positions.
✓

Answer

  1. Chlorobenzene is more reactive than benzene towards electrophilic substitution.

Explanation:

Chlorine shows two effects −I & +M.

Due to the −I effect of Cl group, it reduces the electron density of benzene so chlorobenzene is less reactive than benzene for electrophilic substitution reaction.

But due to the +M effect, it is ortho, para directing, and in chlorobenzene further substitution takes place at ortho and para positions.

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