JEE Advanced levelOne or more correct optionsDifficulty 3 of 3el103
Select the correct statements about antacids.
AExcess sodium hydrogencarbonate is harmless because the stomach pH cannot rise above its normal value
BHydroxide antacids act by the reaction of hydroxide ion with hydrogen ion to form water
CSodium hydroxide is unsuitable as an antacid because it is strongly basic and corrosive
DMagnesium hydroxide and aluminium hydroxide are sparingly soluble, so they do not make the stomach strongly alkaline
Answer: B, C, D
Sparingly soluble hydroxides keep the pH moderate, whereas NaOH is caustic. Neutralisation is OH- + H+ giving H2O. Excess NaHCO3 can make the stomach alkaline, so the last statement is false.