Ethanol can be prepared more easily by which reaction ?
$$\left( {\text{i}} \right)C{H_3}C{H_2}Br + {H_2}O \to $$ $$C{H_3}C{H_2}OH$$
$$\left( {{\text{ii}}} \right)C{H_3}C{H_2}Br + A{g_2}O$$ $$\left( {{\text{in boiling water}}} \right) \to C{H_3}C{H_2}OH$$
A.
by (i) reaction
B.
by (ii) reaction
C.
Both reactions proceed at same rate
D.
by none
Answer :
by (ii) reaction
Solution :
Heavy metal ions, particularly $$A{g^ + },$$ catalyse $${S_N}1$$ reaction because of the presence of empty orbital.
\[C{{H}_{3}}C{{H}_{2}}Br+A{{g}^{+}}\rightleftharpoons {{\left[ C{{H}_{3}}C{{H}_{2}}\cdot \cdot \cdot X\cdot \cdot Ag \right]}^{+}}\xrightarrow[\left( -AgX \right)]{\text{slow}}C{{H}_{3}}CH_{2}^{+}\xrightarrow[\text{from}\,{{H}_{2}}O]{O{{H}^{-}}}C{{H}_{3}}C{{H}_{2}}OH\]
Releted MCQ Question on Organic Chemistry >> Alcohol, Phenol and Ether
Releted Question 1
Ethyl alcohol is heated with conc $${H_2}S{O_4}$$ the product formed is
A.
\[{{H}_{3}}C\underset{\begin{smallmatrix}
\parallel \\
O
\end{smallmatrix}}{\mathop{-C-}}\,O{{C}_{2}}{{H}_{5}}\]