CBSE 2025 · Region 5 · Set 1 · Q3 · 1 mark
A common feature observed in the crystals of washing soda, copper sulphate, gypsum and ferrous sulphate is that all
Official answer
From CBSE’s own marking scheme for this paper.
(C)
have fixed number of molecules of water of crystallisation in one formula unit of these salts.
Acids, Bases and SaltsWater of CrystallisationRemembermcqeasy
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CBSE Class 10 Science past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.