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Science · 2026 · 1 mark
CBSE 2026 · Region 4 · Set 1 · Q19
An aqueous solution turns red litmus blue. Excess addition of which of the following solution would reverse the change ?
Official answer
From CBSE’s own marking scheme for this paper.
(B)
Hydrochloric acid
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CBSE Class 10 Science past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.