CBSE 2025 · Region 1 · Set 2 · Q21 · 2 marks
Give reasons for the following :(a)The melting points of $\displaystyle \alpha$-amino acids are generally higher than that of the corresponding carboxylic acids.(b)Amino acids show amphoteric behaviour.
Give reasons for the following :
(a)
The melting points of $\displaystyle \alpha$-amino acids are generally higher than that of the corresponding carboxylic acids.
(b)
Amino acids show amphoteric behaviour.
Marking-scheme solution
(a)
Presence of dipolar ion / Zwitter ion which create stronger electrostatic force of attraction /
structure of Zwitter ion with explanation.
(b)
Due to the presence of both carboxylic group and amino group / due to the presence of
zwitter ion structure it can react with acids and bases.
BiomoleculesProteinsUnderstandvery_short_answermedium
More from Biomolecules
- The specific sequence in which amino acids are arranged in a protein is called its2024 · asked 4×
- Assertion: Glucose gets oxidized to six carbon gluconic acid on reaction with bromine water. Reason (R): The…2026 · asked 3×
- Living systems are made up of various complex biomolecules like carbohydrates, proteins, nucleic acids,…2023 · asked 3×
- Carbohydrates are optically active polyhydroxy aldehydes and ketones. They are also called saccharides. All…2023 · asked 3×
- Identify the polysaccharide among the following:2026 · asked 3×
- Which of the following structures represents α -D-glucose?2023 · asked 3×
- Certain organic compounds are required in small amounts in our diet but their deficiency causes specific…2024 · asked 3×
- Give reasons for any 3 of the following observations: Penta-acetate of glucose does not react with…2023 · asked 3×
CBSE Class 12 Chemistry past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.