A) low pH
B) high pH
C) intermediate pH
D) PI (Isoelectric point)
Correct Answer: A
Solution :
\[R-\underset{\begin{smallmatrix} | \\ +N{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-CO{{O}^{-}}\xrightarrow[+{{H}^{+}}]{{}}R-\underset{\begin{smallmatrix} | \\ +N{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-COOH\] It is naturally predominating in acidic solution to avoid ionisation of?COOH.
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