Assertion : Alpha ( α ) -amino acids exist as internal salt in solution as they have amino and carboxylic acid groups in near vicinity. Reason: H + ion given by carboxylic group ( − COOH ) is captured

Question

Assertion : Alpha ( α ) -amino acids exist as internal salt in solution as they have amino and carboxylic acid groups in near vicinity. Reason: H + ion given by carboxylic group ( − COOH ) is captured by amino group ( − NH 2 ​ ) having lone pair of electrons.

TestHub · Accepted Answer

NH 2 ​ − CH 2 ​ − COOH is a typical α -amino acid. In solution it exists as, internal salt or Zwitter ion, ( + NH 3 ​ − CH 2 ​ − COO − ) because the proton ( H + ) of COOH group is captured by − NH 2 ​ group as NH 2 ​ has a lone pair of electrons on N atom.

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