(a) An antacid tablet is taken when you suffer from acidity because it contains substances that can neutralize excess stomach acid. Acidity in the stomach is often caused by the production of an excessive amount of hydrochloric acid. Antacids typically contain alkaline substances, such as calcium carbonate or magnesium hydroxide, which can react with and neutralize the excess acid, providing relief from symptoms like heartburn and indigestion.
(b) Calamine solution is applied on the skin when an ant bites because calamine is known for its soothing and anti-itch properties. Ant bites can cause skin irritation, redness, and itching due to the venom injected by the ant. Calamine contains a combination of zinc oxide and iron oxide, which helps to cool and soothe the affected area. It also forms a protective barrier on the skin, reducing inflammation and providing relief from the discomfort caused by the ant bite.
(c) Factory waste is neutralized before disposing it into water bodies to mitigate the environmental impact. Industrial processes often generate acidic or alkaline waste, which, if directly released into water bodies, can harm aquatic ecosystems. Neutralizing the waste involves adjusting its pH to a level closer to neutral (pH 7) to minimize its harmful effects. This process helps prevent the release of corrosive or toxic substances into rivers, lakes, or oceans, protecting aquatic life and maintaining the overall health of the environment.