question_answer

\[P\xrightarrow[2.\,{{H}_{3}}{{O}^{+}}]{1.C{{H}_{3}}MgBr}R\xrightarrow[2.\,\Delta ]{1.\,dil\,NaOH}\] 4-methylpent-3-en-2-one P is

A)  Propanone    

B)  Ethan amine

C)  Ethane nitrile   

D)  Ethanal.

Correct Answer: C

Solution :

:  \[\underset{\begin{smallmatrix}  Ethanenitrilt \\  p \end{smallmatrix}}{\mathop{{{H}_{3}}C-C\equiv N}}\,\xrightarrow[{{H}_{3}}{{O}^{+}}]{C{{H}_{3}}MgBr}\underset{Acetone\,(2\,moles)}{\mathop{C{{H}_{3}}COC{{H}_{3}}}}\,\]