COMEDK · Chemistry · 30. Biomolecules
Two statements, one Assertion (A) and the other Reason (R) are given. Choose the correct option.
Assertion: 2-aminoethanoic acid and p-aminobenzene sulphonic acid can exist as Zwitter ions while p-aminobenzoic acid cannot.
Reason: When the acid group is a relatively strong proton donor and the \(-\mathrm{NH}_2\) group is sufficiently basic it can accept a \(\mathrm{H}^{+}\)ion from the acid group to form the dipolar ion.
- A Both A and R are correct but R is not the correct explanation of A .
- B Both A and R are correct and R is the correct explanation of A .
- C \(A\) is correct but \(R\) is wrong.
- D A is wrong but R is correct.
Answer & Solution
Correct Answer
(B) Both A and R are correct and R is the correct explanation of A .
Step-by-step Solution
Detailed explanation
A Zwitter ion is formed when an acidic group (proton donor) and a basic group (proton acceptor) are present in the same molecule, allowing for internal proton transfer. 2-aminoethanoic acid (glycine) contains a carboxylic acid group (\(-COOH\)) and an amino group (\(-NH_2\)),…
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