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NEET Chemistry Haloalkanes and Haloarenes / हैलोएल्केन तथा हैलोएरीन्स Question Bank Self Evaluation Test - Haloalkanes and Haloarenes

  • question_answer
    The order of reactivity of the given haloalkanes towards nucleophile is:

    A) \[RI>RBr>RCl\] 

    B) \[RCl>RBr>RI\]

    C) \[RBr>RCl>RI\]  

    D) \[RBr>RI>RCl\]

    Correct Answer: A

    Solution :

    [a] For a given alkyl group, the order of reactivity is \[\xleftarrow[increasing\text{ }bond\text{ }energy]{R-I>R-Br>R-Cl>R-F}\] decreasing halogen reactivity. This order depends on the carbon-halogen bond energy; the carbon-fluorine bond energy is maximum and thus fluorides are least reactive while carbon-iodine bond energy is minimum hence iodides are most reactive,   


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