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NEET AIPMT SOLVED PAPER SCREENING 2007

  • question_answer
                    For the following:                                                                                                                                                            (i) \[{{I}^{-}}\]                                            (ii) \[C{{l}^{-}}\]                                (iii) \[B{{r}^{-}}\]                 the increasing order of nucleophilicity would be:

    A)                            \[{{I}^{-}}<B{{r}^{-}}<C{{l}^{-}}\]

    B)                 \[C{{l}^{-}}<B{{r}^{-}}<{{I}^{-}}\]

    C)                 \[{{I}^{-}}<C{{l}^{-}}<B{{r}^{-}}\]

    D)                 \[B{{r}^{-}}<C{{l}^{-}}<{{I}^{-}}\]

    Correct Answer: A

    Solution :

                    Halogens are the most reactive elements. High reactivity is due to their low dissociation energy. Further among halogens reactivity decreases as we move down the group. So, the .correct order of nucleophilicity would be                 \[{{I}^{-}}<B{{r}^{-}}<C{{l}^{-}}\]


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