Antacids are commonly used to get rid of acidity in the stomach. A commonly used antacid is

Antacids are mild bases used to neutralize excess hydrochloric acid produced in the stomach during indigestion, which otherwise causes pain and irritation [3]. Magnesium hydroxide, commonly known as Milk of Magnesia, is a frequently used antacid for this purpose due to its ability to act as a mild base that attenuates gastric acidity [3]. Other common antacids include sodium hydrogencarbonate (baking soda), which is also alkaline and provides relief by neutralizing stomach acid [2]. While calcium compounds like calcium carbonate are used in antacids, calcium hydroxide is generally too caustic for direct ingestion as a common remedy. Sodium hydrogen phthalate is a buffer used in laboratories, and manganese acetate is a chemical salt not used for treating acidity. Therefore, magnesium hydroxide is the most appropriate choice among the given options for a commonly used antacid [3].

Sources

1. [1] Science , class X (NCERT 2025 ed.) > Chapter 2: Acids, Bases and Salts > pH in our digestive system > p. 27
2. [3] Science , class X (NCERT 2025 ed.) > Chapter 5: Life Processes > Activity 5.3 > p. 85
3. [2] Science , class X (NCERT 2025 ed.) > Chapter 2: Acids, Bases and Salts > Uses of Baking soda > p. 31