JEE Main & Advanced Chemistry Hydrocarbons Question Bank Aromatic Hydrocarbon

  • question_answer Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively  [KCET 2004]

    A) Zinc dust and soda lime

    B) Soda lime and zinc dust

    C) Zinc dust and sodium hydroxide

    D) Soda lime and copper

    Correct Answer: B

    Solution :

               \[{{C}_{6}}{{H}_{5}}COOH+\underset{\text{(x)}}{\mathop{NaOH}}\,\to {{C}_{6}}{{H}_{5}}COONa+{{H}_{2}}O\]           \[\xrightarrow{NaOH}{{C}_{6}}{{H}_{6}}+N{{a}_{2}}C{{O}_{3}}\] \[{{C}_{6}}{{H}_{5}}OH+\underset{\text{(y)}}{\mathop{Zn}}\,\xrightarrow{\text{distill}}{{C}_{6}}{{H}_{6}}+ZnO\]

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