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

  • question_answer
    Which of the following reactions does not take place?

    A) \[{{C}_{2}}{{H}_{5}}Br+KN{{O}_{2}}\to {{C}_{2}}{{H}_{5}}-O-N=O+KBr\]

    B) \[{{C}_{2}}{{H}_{5}}Br+AgN{{O}_{2}}\to {{C}_{2}}{{H}_{5}}-\] +AgBr

    C) \[{{C}_{2}}{{H}_{5}}Br+AgCN\to {{C}_{2}}{{H}_{5}}NC+AgBr\]

    D) \[{{C}_{2}}{{H}_{5}}Br+KCN\to {{C}_{2}}{{H}_{5}}NC+KBr\]

    Correct Answer: D

    Solution :

    \[{{C}_{2}}{{H}_{5}}Br+KCN\to {{C}_{2}}{{H}_{5}}CN+KBr\] Due to ionic nature, the attack by CN- occurs through C atom and alkyl cyanide is formed.


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