RAJASTHAN PMT Rajasthan - PMT Solved Paper-2000

  • question_answer
    When excess of ethyl alcohol heated at \[{{140}^{o}}C\]with concentrate sulphuric acid the compound that distills is:

    A)  \[{{C}_{2}}{{H}_{5}}-O-{{C}_{2}}{{H}_{5}}\]

    B)  ethyl hydrogen sulphate

    C)  \[C{{H}_{2}}=C{{H}_{2}}\]

    D)  di ethyl sulphate

    Correct Answer: A

    Solution :

    \[{{C}_{2}}{{H}_{5}}OH+{{H}_{2}}S{{O}_{4}}\xrightarrow{{}}{{C}_{2}}{{H}_{2}}OS{{O}_{2}}OH+{{H}_{2}}O\] \[{{C}_{2}}{{H}_{5}}OS{{O}_{2}}OH+{{C}_{2}}{{H}_{5}}OH\xrightarrow{{}}\]                                 \[\underset{Di\,\,ethyl\,\,ether\,}{\mathop{{{C}_{2}}{{H}_{5}}-O-{{C}_{2}}{{H}_{5}}}}\,+{{H}_{2}}S{{O}_{4}}\]


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