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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 (-NH2) having lone pair of electrons.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

1 Answer

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Best answer

The correct option is: (a)

Explanation:

NH2-CH2-COOH is a typical α-amino acid.

In solution it exists as, internal salt or Zwitter ion, (+NH3 -CH2 -COO-)

because the proton (H+) of COOH group is captured by -NH2 group as NH2 has a lone pair of electrons on N atom.

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