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JEE Main & Advanced Sample Paper JEE Main Sample Paper-21

  • question_answer
    In which reactions major product is carbonyl compound? (i) \[{{C}_{6}}{{H}_{6}}+C{{H}_{3}}COOL\xrightarrow{Anhy.AlC{{l}_{3}}}\] (ii) \[{{(PH-C{{H}_{2}})}_{2}}C{{d}_{2}}Cd+2C{{H}_{3}}COCl\xrightarrow{{}}\] (iii) \[C{{H}_{2}}-C\equiv CH\xrightarrow[{{H}_{2}}S{{O}_{4}}]{HgS{{O}_{4}}}\] (iv)  \[PH-C{{H}_{3}}\xrightarrow[(2){{H}_{2}}{{O}^{+}}]{(1)Cr{{O}_{2}}C{{l}_{\,}}}\]

    A)  only i & ii       

    B)  only iii & iv

    C)  only I & iv                   

    D)  i, ii, iii & iv

    Correct Answer: D

    Solution :

    (i)         \[{{C}_{6}}\,{{H}_{6}}+C{{H}_{3}}COCl\xrightarrow{Anhy.AlC{{l}_{3}}}Ph-\overset{\begin{smallmatrix}  O \\  \,|| \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\] (ii) \[{{(Ph-C{{H}_{2}})}_{2}}\,Cd+2C{{H}_{3}}COCl\]\[\xrightarrow{{}}Ph-C{{H}_{2}}-\overset{\begin{smallmatrix}  O \\  \,|| \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\] (iii) \[C{{H}_{2}}-C\equiv CH\,\xrightarrow{HgS{{O}_{4}}}\,C{{H}_{3}}-\overset{\begin{smallmatrix}  O \\  || \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\] (iv) \[Ph-C{{H}_{3}}\,\xrightarrow{(1)\,Cr{{O}_{2}}\,C{{l}_{2}}}\,Ph-CH=O\]


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