Q1. [1] § 2.1 UNDERSTANDING THE CHEMICAL PROPERTIES OF ACIDS AND BASES § 2.4 MORE ABOUT SALTS
Study the following table and select the correct option :
- (A) NaCl, HCl, NaOH, Basic
- (B) Na₂CO₃, H₂CO₃, NaOH, Neutral
- (C) Na₂SO₄, H₂SO₄, NaOH, Acidic
- (D) CH₃COONa, CH₃COOH, NaOH, Basic
Previously asked in CBSE board exam
2026 31/5/1 Q20
Generated by claude-sonnet-4-6 · 2026-06-14 10:34 · grounding rag
Model Answer
(D) CH₃COONa, CH₃COOH, NaOH, Basic — CH₃COONa is formed from weak acid (CH₃COOH) and strong base (NaOH), so its nature is basic. This is the only correct row.
Explanation
- NaCl (Option A): formed from strong acid + strong base → neutral, not basic.
- Na₂CO₃ (Option B): formed from weak acid (H₂CO₃) + strong base (NaOH) → basic, not neutral.
- Na₂SO₄ (Option C): formed from strong acid + strong base → neutral, not acidic.
- CH₃COONa (Option D): weak acid + strong base → basic ✓ — this is the only entry where all four columns are correct.
Key rule: Salt of weak acid + strong base = basic; strong acid + strong base = neutral; weak base + strong acid = acidic.
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