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Science · 2026 · 1 mark
CBSE 2026 · Region 5 · Set 1 · Q20
Study the following table and select the correct option : Salt Acid used Base used Nature of Salt (A) NaCl HCl NaOH Basic (B) $\displaystyle \mathrm{Na}_{2} \mathrm{CO}_{3}$ $\displaystyle \mathrm{H}_{2} \mathrm{CO}_{3}$ NaOH Neutral (C) $\displaystyle \mathrm{Na}_{2} \mathrm{SO}_{4}$ $\displaystyle \mathrm{H}_{2} \mathrm{SO}_{4}$ NaOH Acidic (D) $\displaystyle \mathrm{CH}_{3} \mathrm{COONa}$ $\displaystyle \mathrm{CH}_{3} \mathrm{COOH}$ NaOH Basic
| Salt | Acid used | Base used | Nature of Salt | |
| (A) | NaCl | HCl | NaOH | Basic |
| (B) | $\displaystyle \mathrm{Na}_{2} \mathrm{CO}_{3}$ | $\displaystyle \mathrm{H}_{2} \mathrm{CO}_{3}$ | NaOH | Neutral |
| (C) | $\displaystyle \mathrm{Na}_{2} \mathrm{SO}_{4}$ | $\displaystyle \mathrm{H}_{2} \mathrm{SO}_{4}$ | NaOH | Acidic |
| (D) | $\displaystyle \mathrm{CH}_{3} \mathrm{COONa}$ | $\displaystyle \mathrm{CH}_{3} \mathrm{COOH}$ | NaOH | Basic |
Marking-scheme solution
(D)
/ \(\displaystyle \mathrm{CH}_{3} \mathrm{COONa}\) | \(\displaystyle \mathrm{CH}_{3} \mathrm{COOH}\) | NaOH | Basic
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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.