✓ Board-verified
Chemistry · 2025 · 3 marks
CBSE 2025 · Region 2 · Set 2 · Q28
(a) Write the product obtained when D-glucose reacts with H_2 N - OH. (b) Amino acids show amphoteric behaviour, why? (c) Why vitamin C cannot be…
(a)
Write the product obtained when D-glucose reacts with $\displaystyle \mathrm{H}_{2} \mathrm{~N}-\mathrm{OH}$.
(b)
Amino acids show amphoteric behaviour, why ?
(c)
Why vitamin C cannot be stored in our body ?
Marking-scheme solution
(a)
(b)
Due to the presence of zwitter ion structure it can react with acids and bases./ Due to the
presence of both carboxylic group and amino group.
(c)
It is water soluble vitamin and is excreted in urine.
More from Biomolecules
- Assertion: Vitamin C cannot be stored in our body. Reason (R): Vitamin C is water soluble and readily excreted in urine.2024 · asked 2×
- Write two differences between DNA and RNA. 1 × 22023 · asked 2×
- Differentiate between the following: 2 × 1 (i) Acidic amino acids and basic amino acids (ii) Nucleotide and Nucleoside2026
- Assertion: Glucose gets oxidized to six carbon gluconic acid on reaction with bromine water. Reason (R): The carbonyl group is absent in the open…2026
- Living systems are made up of various complex biomolecules like carbohydrates, proteins, nucleic acids, lipids, etc. Carbohydrates are optically…2023
- Helical structure of proteins is stabilized by:2023
- Assertion: The pentaacetate of glucose does not react with H_2 N-OH. Reason (R): It indicates the presence of free - CHO group in glucose.2026
- Write the reactions of glucose with: H_2 N-OH Br_2 water2024
CBSE Class 12 Chemistry past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.