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Science · 2026 · 2 marks
CBSE 2026 · Region 5 · Set 1 · Q25
Define the following terms: (i) Olfactory indicator (ii) Water of crystallization
Define the following terms :
(i)
Olfactory indicator
(ii)
Water of crystallization
Marking-scheme solution
(i) The substances whose odour changes in acidic or basic media.
(ii) The fixed number of water molecules present in one formula unit of a salt.
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CBSE Class 10 Science past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.