When butan-2-ol is dehydrated using sulphuric acid, the concentration of acid and temperature needed respectively is
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- \(60%\) conc. and \(373~\text{K}\)
- \(20%\) conc. and \(373~\text{K}\)
- \(20%\) conc. and \(363~\text{K}\)
- \(95%\) conc. and \(373~\text{K}\)
The Correct Option is A
Solution and Explanation
Dehydration of secondary alcohols requires moderately concentrated sulphuric acid and controlled heating.
Step 2: Reaction conditions.
Butan-2-ol undergoes elimination in the presence of about \(60%\) sulphuric acid at \(373~\text{K}\).
Step 3: Conclusion.
Thus, the correct condition is \(60%\) sulphuric acid and \(373~\text{K}\).
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