Question

\[\ce{R - CH2 - CCl2 - R ->[Peagent] R - C ≅ C - R}\]. The reagent is:-

Options

• Na

• HCl in H₂O

• KoH in L₂ H₅ OH

• zn inalcohol

Answer 1

KoH in L₂ H₅ OH

Explanation:

Dehydrohologenation reaction

\[\begin{array}{cc}
\ce{Cl}\phantom{...................................................}\\
|\phantom{....................................................}\\
\phantom{}\ce{RCH2 - C - R ->[C2H5OH + KOH][-KCl - H2O] RCH ≡ C - R ->[KoH + C2H5OH][-KCl - H2O] R - C ≡ C - R}\\
\phantom{}|\phantom{...........................}|\phantom{........................}\\
\phantom{..}\ce{Cl}\phantom{.........................}\ce{Cl}\phantom{.........................}
\end{array}\]