CBSE 2026 · Region 5 · Set 3 · Q21 · 2 marks
(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 /
BiomoleculesVitaminsRemembervery_short_answereasy
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CBSE Class 12 Chemistry past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.