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Which salt is commonly used as an antacid to relieve indigestion caused by excess stomach acid?

Answer and explanation

Correct answer: NaHCO₃

Sodium hydrogen carbonate, NaHCO₃, also called baking soda, is a mild basic salt. It neutralises excess hydrochloric acid in the stomach according to the reaction NaHCO₃ + HCl → NaCl + H₂O + CO₂. NaCl is neutral, CaSO₄ is not the usual antacid, and sodium carbonate is too strongly alkaline for this common use. Hence option B is correct.

Related tags

ScienceClass10Acids-Bases-SaltsAntacidBaking-SodaNeutralisationAcidsBasesAnd SaltsAcids Bases And Salts

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