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CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2011

  • question_answer
    Following is the substitution reaction in which \[-CN\] replaces \[-Cl\]. \[R-Cl+\underset{(alcoholic)}{\mathop{KCN}}\,\xrightarrow[\Delta ]{}R-CN+KCl\] To obtain propanenitrile, \[R-Cl\] should be

    A)  chloroethane                   

    B)  1-chloropropane

    C)  chloromethane               

    D)  2-chloropropane

    Correct Answer: A

    Solution :

    \[{{C}_{2}}{{H}_{5}}-Cl+\underset{(alc.)}{\mathop{KCN}}\,\xrightarrow{\Delta }{{C}_{2}}{{H}_{5}}-CN-KCl\] Hence, to obtain propanenitrile, \[R-Cl\]should be chloroethane.


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