What are antacids? Name one mild base used as an antacid.
Generated by claude-sonnet-4-6 · 2026-06-17 12:34 · grounding rag
Model Answer
Antacids are medicines used to neutralise excess hydrochloric acid produced in the stomach, thereby relieving indigestion and acidity. They are mild bases that react with the excess acid to form salt and water.
One mild base used as an antacid: Milk of Magnesia (Magnesium hydroxide, Mg(OH)₂).
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Explanation
- The question has two parts: definition (1 mark) and example (1 mark). Keep it concise.
- Key points examiners look for: (1) antacids neutralise excess stomach acid, (2) they are mild/weak bases, (3) a correct named example. Mg(OH)₂ is the standard NCERT example; baking soda (NaHCO₃) is also acceptable.
- Do not write a long paragraph — two sentences plus the example is sufficient for 2 marks.