Antacids are _______ in natureA.AcidicB.BasicC.SaltD.Ionic

Antacids are B. Basic in nature.

Explanation:
Definition of Antacids: Antacids are substances that neutralize stomach acidity. They are commonly used to relieve symptoms of heartburn, indigestion, and upset stomach.

Chemical Composition: Most antacids contain basic compounds such as hydroxides, carbonates, or bicarbonates. Common active ingredients include:

Magnesium hydroxide
Aluminum hydroxide
Calcium carbonate
Sodium bicarbonate
Mechanism of Action: When ingested, antacids react with gastric acid (hydrochloric acid, HCl) to form water and other neutral compounds, which reduces acidity in the stomach. This reaction demonstrates their basic nature as they work to increase pH.

Conclusion: Given that antacids primarily function by neutralizing acids and contain basic compounds, they are classified as basic in nature.

Thus, the correct answer is B. Basic.