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The P-Block Elements

Question
CBSEENCH12011369
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For the following:
(i) I-  (ii) Cl-   (iii) Br-

the increasing order of nucleophilicity would be: 

  • I- < Br- < Cl-

  • Cl- < Br- < I-

  • I- < Cl- < Br-

  • Br- < Cl- < I-

Solution

A.

I- < Br- < Cl-

Halogens are the most reactive elements. High reactivity is due to their low dissociation energy. Further among halogen reactivity decreases as we move down the group. So, the correct order of nucleophilicity would be
I- < Br- < Cl-

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