CBSE 2025 · Region 4 · Set 1 · Q18 · 1 mark
Assertion (A) : Concentrated nitric acid is diluted by adding water slowly to acid with constant stirring.
Reason (R) : Concentrated nitric acid is easily soluble in water.
Official answer
From CBSE’s own marking scheme for this paper.
(D)
Assertion (A) is false, but Reason (R) is true.
Acids, Bases and SaltsChemical Properties of Acids and BasesUnderstandassertion_reasonmedium
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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.