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Q64 (CISF/2022) Science & Technology › Basic Science (Physics, Chemistry, Biology)

Which one of the following compounds is present in antacid tablets or medicines which are used to cure indigestion and acidity in the stomach ?

Result
Your answer: —  ·  Correct: D

Explanation

Antacids are mild bases used to neutralize excess hydrochloric acid (HCl) produced in the stomach, which causes indigestion and acidity. Aluminium hydroxide (Al(OH)3) is a common active ingredient in many over-the-counter antacid tablets and liquids. It reacts with stomach acid to form aluminium chloride and water, thereby raising the pH level.

Options A (Sodium hydroxide) and B (Potassium hydroxide) are strong bases that are highly corrosive and caustic; they would cause severe chemical burns to the esophagus and stomach lining if ingested. Option C (Lithium hydroxide) is also a strong, corrosive base and is not used medicinally for acidity. Other common antacids include magnesium hydroxide (Milk of Magnesia), calcium carbonate, and sodium bicarbonate (baking soda).

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