Question

The reaction of ethanol with concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4$ does not give

• A. Ethene
• B. Diethyl ether
• C. Ethyl hydrogen sulphate
• D. Acetylene

Answer 1

The correct option is D

Acetylene

Explanation of the correct option:

Option D is correct:

1. When alcohols react with Acetic acid in the presence of concentrated Sulphuric acid, it commonly results in the formation of Ester compounds, sometimes alkenes based on the alcohol that is reacting.
2. Hence, the reaction of Ethanol (${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$) with concentrated Sulphuric acid ($\mathrm{conc}.{\mathrm{H}}_2{\mathrm{SO}}_4$) does not form acetylene.

Explanation of the incorrect options:

Options A, B, and C are incorrect:

Ethanol (${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$) when reacted with concentrated Sulphuric acid ($\mathrm{conc}.{\mathrm{H}}_2{\mathrm{SO}}_4$) forms Ethene (${\mathrm{C}}_2{\mathrm{H}}_4$), Diethyl Ether (${\left({\mathrm{C}}_2{\mathrm{H}}_5\right)}_2\mathrm{O}$), and Ethyl hydrogen sulphate (${\mathrm{C}}_2{\mathrm{H}}_6{\mathrm{O}}_4\mathrm{S}$) at different temperatures.

${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}\stackrel{\mathrm{conc}.{\mathrm{H}}_2{\mathrm{SO}}_4}{\to }\left\{\begin{array}{l}{C}_2{\mathrm{H}}_4\\ C_2{\mathrm{H}}_5{\mathrm{OC}}_2{\mathrm{H}}_5\\ {\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{HSO}}_4\end{array}\right.$

Hence, the correct answer is option D.

The reaction of ethanol with concentrated $\mathrm{conc}.{\mathrm{H}}_2{\mathrm{SO}}_4$ does not give Acetylene.