CBSE 2025 · Region 3 · Set 1 · Q22 · 2 marks
(a)Write the formula of the ions which (i) acids, and (ii) bases generate in water solutions.(b)Dry HCl gas does not change the colour of dry litmus paper. Why ?
(a)
Write the formula of the ions which (i) acids, and (ii) bases generate in water solutions.
(b)
Dry HCl gas does not change the colour of dry litmus paper. Why ?
Marking-scheme solution
(a) (i) \(\displaystyle \mathrm{H}^{+} / \mathrm{H}_{3} \mathrm{O}^{+}\)
(ii) \(\displaystyle \mathrm{OH}^{-}\)
(b) Dry HCl does not dissociate into hydrogen ions in absence of water.
Acids, Bases and SaltsWhat Acids and Bases have in CommonRemembervery_short_answereasy
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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.