KCET · Chemistry · Alcohols Phenols and Ethers
The major product obtained when ethanol is heated with excess of conc. \(\mathrm{H}_2 \mathrm{SO}_4\) at \(443 \mathrm{~K}\) is
- A ethyne
- B ethane
- C methane
- D ethene
Answer & Solution
Correct Answer
(D) ethene
Step-by-step Solution
Detailed explanation
The major product obtained when ethanol is heated with excess of conc. \(\mathrm{H}_2 \mathrm{SO}_4\) at \(443 \mathrm{~K}\) is ethene. The reaction involve is as follows
\[
\underset{\text { Ethanol }}{\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH}} \stackrel{\text { Conc. } \mathrm{H}_2 \mathrm{SO}_4}{443 \mathrm{~K}} \underset{\text { Ethenc }}{\mathrm{CH}_2}=\mathrm{CH}_2+\mathrm{H}_2 \mathrm{O}
\]
\[
\underset{\text { Ethanol }}{\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH}} \stackrel{\text { Conc. } \mathrm{H}_2 \mathrm{SO}_4}{443 \mathrm{~K}} \underset{\text { Ethenc }}{\mathrm{CH}_2}=\mathrm{CH}_2+\mathrm{H}_2 \mathrm{O}
\]
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