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Q. $ C{{H}_{3}}-C\equiv CH+{{H}_{2}}O\xrightarrow[{}]{{{H}^{+}}/H{{g}^{2+}}}X, $ Compound X, is

Rajasthan PETRajasthan PET 2005

Solution:

$ \underset{propyne}{\mathop{C{{H}_{3}}}}\,-C\equiv CH+{{H}_{2}}O\xrightarrow[{}]{{{H}^{+}}/H{{g}^{2+}}} $ $ \underset{enolic\text{ }form\text{ }of\text{ }acetone}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{C}}\,\equiv C{{H}_{2}}}}\,\underset{acetone}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,\equiv C{{H}_{3}}}}\, $