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Chemistry · PYQ NEET UG 2019(1)
हिन्दीThe compound that is most difficult to protonate is _________.
Correct answer · Option 3
\( \text{Ph}-\text{O}-\text{H} \)
Explanation
In phenol (\( \text{Ph}-\text{O}-\text{H} \)), the lone pair on oxygen is delocalized into the benzene ring via resonance, reducing its basicity and making protonation most difficult.
