12th Class Chemistry Haloalkanes and Haloarenes / हैलोएल्केन तथा हैलोएरीन्स Question Bank 12th CBSE Chemistry Haloalkanes and Haloarenes

  • question_answer
      Give reasons for the following : (i) Dipole moment of  is higher than that of . (ii) The reactions of primary and secondary alcohols with HY require presence of  as catalyst.

    Answer:

      (i) Although F is more electronegative than  atom, dipole moment of is greater than  because F atom is very small w.r.t.  atom. We know that dipole moment = charge x bond length. So, smaller bond length means less dipole moment. (ii) The reaction of 1 ° and 2° alcohol with HA" is very slow and hence a catalyst  is added to increase reactivity rate.


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