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Question: Amino acids are classified as acidic, basic or neutral depending upon the relative number of amino a...

Amino acids are classified as acidic, basic or neutral depending upon the relative number of amino and carboxyl group in their molecules. Which of the following are acidic?

(i)

(ii)

(iii) H2 N−CH2−CH2−CH2−COOH\mathrm { H } _ { 2 } \mathrm {~N} - \mathrm { CH } _ { 2 } - \mathrm { CH } _ { 2 } - \mathrm { CH } _ { 2 } - \mathrm { COOH }

(iv)

A

(ii) and (iv)

B

(iii) and (iv)

C

(i) and (ii)

D

(ii) and (iii)

Answer

(ii) and (iv)

Explanation

Solution

Amino acid which contain one -NH2\mathrm { NH } _ { 2 }group and

two –COOH group are acidic in nature.