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Chemistry · 2026 · 2 marks
CBSE 2026 · Region 5 · Set 2 · Q21
(a) Name two water-soluble vitamins. (b) How will you prove the absence of free - CHO group in the cyclic structure of glucose molecule?
(a)
Name two water-soluble vitamins.
(b)
How will you prove the absence of free - CHO group in the cyclic structure of glucose molecule ?
Marking-scheme solution
(a)
Vitamin B and C / Vitamin B1, B2, B6, B12, Vitamin C .
(b)
Pentaacetate of glucose does not react with hydroxylamine .
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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.