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Which of the following are used as an antacid to reduce acidity in stomach?

1. Sodium carbonate and magnesium hydroxide
2. Magnesium hydroxide and sodium hydroxide
3. Sodium bicarbonate and calcium hydroxide
4. Sodium bicarbonate and magnesium hydroxide

Correct answer: Sodium bicarbonate and magnesium hydroxide

Solution

Sodium bicarbonate and magnesium hydroxide are both weak bases used to neutralize excess hydrochloric acid in the stomach. Strong bases like sodium hydroxide or calcium hydroxide are too corrosive to be used as antacids.

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