JEE Main Chemistry question

In an electric field, if an amino acid migrates towards the cathode, the pH of the solution is said to be

(A)Less than pICorrect
(B)More than pI
(C)Equal to pI
(D)7

Answer: (A)

Solution

An amino acid migrates toward the cathode (negative electrode) only when it carries a net positive charge, which occurs when the solution pH is below the amino acid's isoelectric point (pI), since excess H⁺ protonates the molecule into its cationic

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Question ID VK-150785