✓ Board-verified
Chemistry · 2026 · 2 marks
CBSE 2026 · Region 5 · Set 3 · Q21
(a) Name the disease caused by the deficiency of Vitamin A. (b) How will you confirm the presence of carbonyl group as an aldehydic group in glucose?
(a)
Name the disease caused by the deficiency of Vitamin A.
(b)
How will you confirm the presence of carbonyl group as an aldehydic group in glucose ?
Marking-scheme solution
(a)
Xerophthalmia /Night blindness
(b)
Glucose gets oxidised to six carbon atom carboxylic acid by mild oxidising agent
like bromine water to form gluconic acid /
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 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.