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Which of the following does not exist as a zwitter ion?
- a)Glycine
- b)Glutamic acid
- c)Sulphanilic acid
- d)p-aminobenzoic acid
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Which of the following does not exist as a zwitter ion?a)Glycineb)Glu...
Explanation:
Zwitterion:
- A zwitterion is a molecule that has both positive and negative charges, but the overall charge of the molecule is neutral.
- Zwitterions are commonly found in amino acids where the amino group (-NH2) is protonated (positive charge) and the carboxyl group (-COOH) is deprotonated (negative charge).
Options:
- Glycine: Glycine exists as a zwitterion due to its amino and carboxyl groups.
- Glutamic acid: Glutamic acid also exists as a zwitterion due to its structure with both positive and negative charges.
- Sulphanilic acid: Sulphanilic acid can exist as a zwitterion due to its acidic and basic functional groups.
- p-aminobenzoic acid: p-aminobenzoic acid does not exist as a zwitterion because it lacks the necessary functional groups to form positive and negative charges simultaneously.
Therefore, option D) p-aminobenzoic acid does not exist as a zwitter ion.
Zwitterion:
- A zwitterion is a molecule that has both positive and negative charges, but the overall charge of the molecule is neutral.
- Zwitterions are commonly found in amino acids where the amino group (-NH2) is protonated (positive charge) and the carboxyl group (-COOH) is deprotonated (negative charge).
Options:
- Glycine: Glycine exists as a zwitterion due to its amino and carboxyl groups.
- Glutamic acid: Glutamic acid also exists as a zwitterion due to its structure with both positive and negative charges.
- Sulphanilic acid: Sulphanilic acid can exist as a zwitterion due to its acidic and basic functional groups.
- p-aminobenzoic acid: p-aminobenzoic acid does not exist as a zwitterion because it lacks the necessary functional groups to form positive and negative charges simultaneously.
Therefore, option D) p-aminobenzoic acid does not exist as a zwitter ion.
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Which of the following does not exist as a zwitter ion?a)Glycineb)Glu...
The lone pair of electrons on the -NH2 group is donated towards the benzene ring due to resonance effect. As a result, acidic character of -COOH group and basic character of -NH2 group decrease. Therefore, the weakly acidic -COOH group cannot transfer an H+ ion to the weakly basic -NH2 group. Thus, o- and p-aminobenzoic acids do not exist as zwitter ions.
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Which of the following does not exist as a zwitter ion?a)Glycineb)Glutamic acidc)Sulphanilic acidd)p-aminobenzoic acidCorrect answer is option 'D'. Can you explain this answer?
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