question_answer

Which of the following is not true in case of reaction with heated copper at \[300{}^\circ C\]?

A) Phenol\[\to \] benzyl alcohol

B) Secondary alcohol \[\to \] ketone

C) Primary alcohol\[\to \] aldehyde

D) Tertiary alcohol\[\to \] olefin.

Correct Answer: A

Solution :

a. Phenol \[\xrightarrow[300{}^\circ \,C]{Cu}\] benzyl alcohol is not true. b.   Secondary alcohol \[\xrightarrow[300{}^\circ \,C]{Cu}\] ketone is true. c.   Primary alcohol  \[\xrightarrow[300{}^\circ \,C]{Cu}\] aldehyde is true. \[\underset{Ethanol}{\mathop{{{C}_{2}}{{H}_{5}}OH}}\,\xrightarrow[300{}^\circ C]{Cu}\underset{Acetaldehyde}{\mathop{C{{H}_{3}}CHO}}\,+{{H}_{2}}\] d.   Tertiary alcohol \[\to \] olefin is true.