Question

Ethanol is converted into ethoxy ethane:
A. By heating excess of ethanol with conc. \[{{\text{H}}_2}{\text{S}}{{\text{O}}_4}\] at \[{140^0}{\text{C}}\]
B. By heating ethanol with excess of conc. \[{{\text{H}}_2}{\text{S}}{{\text{O}}_4}\] at \[413{\text{K}}\]
C. By treating with conc. \[{{\text{H}}_2}{\text{S}}{{\text{O}}_4}\] at a room temperature
D. By treating with conc. \[{{\text{H}}_2}{\text{S}}{{\text{O}}_4}\] at \[273{\text{K}}\]

Answer 1

Hint: First of all, find out the formulas of ethanol and ethoxyethane. Then try to write the reactions of given options and find out products. So that you can find out which process can convert ethanol to ethoxyethane.

Complete step by step answer: By heating excess of ethanol with conc. \[{{\text{H}}_2}{\text{S}}{{\text{O}}_4}\] at \[{140^0}{\text{C}}\], ethanol can be converted into ethoxy ethane. The chemical formula of ethane can be written as \[{{\text{C}}_2}{{\text{H}}_5}{\text{OH}}\]. The chemical formula of ethoxy ethane is \[{{\text{(}}{{\text{C}}_2}{{\text{H}}_5}{\text{)}}_2}{\text{O}}\]. Ethoxy ethane can also be called as diethyl ether.
\[
  C{H_3}C{H_2}O{H_{{\text{excess}}}}\xrightarrow[{{{140}^0}C}]{{{\text{conc}}{\text{.}}{H_2}S{O_4}}}C{H_3}C{H_2} - O - C{H_3}C{H_2} + {H_2}O \\
  {\text{ Ethanol Ethoxy ethane water}} \\
\]
This is the process of formation of ethoxy ethane from ethanol.
So, the correct answer is “Option A”.

Additional information:
Features of ethoxyethane:
-It possesses an anaesthetic odour.
-It can be used as a solvent.
-It is very clear.
-It is colourless.
-It is in a liquid state.
-It is slightly soluble in water.
Applications of ethanol:
-It is used as an important industry chemical.
-It is used in beverages like beer, wine etc as it is an intoxicating ingredient.
-It is mainly used as a solvent.
-It is used in perfumes, medicines, drugs etc
-It is used in hand sanitizers and medical wipes.

Note: To get reactions without any mistake, correct chemical formula is required. The remaining options are wrong because they do not produce the required product.