Same chapter3 marksDifficulty: Medium
What is the Reimer-Tiemann reaction, and what does it produce from phenol?
Alcohols, Phenols and Ethers
3 marksDifficulty: Medium
How would you distinguish between a primary, a secondary and a tertiary alcohol?
Original Khojo Papers practice question — not from a past board paper.
Answer
The Lucas test uses concentrated hydrochloric acid with anhydrous zinc chloride: a tertiary alcohol gives immediate turbidity, a secondary alcohol gives it in about five minutes, and a primary alcohol only on heating. Alternatively, oxidation gives an aldehyde from a primary alcohol, a ketone from a secondary one, and no oxidation without breaking a carbon chain from a tertiary one.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The difference in the Lucas test reflects the stability of the carbocation formed.
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