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JEE Main Chemistry question

ChemistryBiomoleculesJEE Main

How many of the numbered locations in the histidine molecule (the imidazole ring and -amino nitrogen) will form an ion in strongly acidic medium?

Answer: 2

Solution

Only the nitrogen atoms whose lone pair is not delocalised into the aromatic imidazole ring are freely available for protonation under

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Question ID VK-151263