An organic compound $$A$$ containing $$C, H$$ and $$O$$ has a pleasant odour with boiling point of $${78^ \circ }C.$$ On boiling $$A$$ with concentrated $${H_2}S{O_4},$$ a colourless gas is produced which decolourises bromine water and alkaline $$KMn{O_4}.$$ The organic liquid $$A$$ is
A.
$${C_2}{H_5}Cl$$
B.
$${C_2}{H_5}COOC{H_3}$$
C.
$${C_2}{H_5}OH$$
D.
$${C_2}{H_6}$$
Answer :
$${C_2}{H_5}OH$$
Solution :
The organic liquid $$A$$ is $${C_2}{H_5}OH.$$
$$\left( {\text{i}} \right)$$ Ethyl alcohol is a colourless liquid with a characteristic pleasant smell, having boiling point $${78.1^ \circ }C.$$
\[\left( \text{ii} \right){{C}_{2}}{{H}_{5}}OH\xrightarrow{\text{conc}\text{.}\,{{\text{H}}_{2}}S{{O}_{4}}}\] \[\underset{\begin{smallmatrix}
\text{Decolourises }B{{r}_{2}}\,\text{water} \\
\text{and alkalin }KMn{{O}_{4}}
\end{smallmatrix}}{\mathop{C{{H}_{2}}=C{{H}_{2}}}}\,\]
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.
\[{{H}_{3}}C\underset{\begin{smallmatrix}
\parallel \\
O
\end{smallmatrix}}{\mathop{-C-}}\,O{{C}_{2}}{{H}_{5}}\]