A) dipolar ion
B) ion formed from amino acid
C) internal salt
D) All of the above
Correct Answer: D
Solution :
\[\underset{\text{amino}\,\,\text{acid}}{\mathop{R-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} N{{H}_{2}} \\ | \end{smallmatrix}}{\mathop{C}}}\,-COOH}}\,\underset{\text{Zwitter}\,\,\text{ion}}{\mathop{R-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} ^{+}N{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}}\,-CO{{O}^{-}}}}\,\] The dipolar structure is commonly known as internal salt or Zwitter ion.
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