G. Give reason :
1. An antacid tablet is taken when you suffer from acidity.
2. Calamine solution is applied on the skin when an ant bites.
3. Factory waste is neutralised before disposing it into water bodies.
4. Toothpastes are alkaline.
Answers
Explanation:
Acidity is caused due to the excess production of acids in the stomach. An antacid tablet contains bases, such as milk of magnesia(magnesium hydroxide, gelusil,etc. These bases react with excess of acids and neutralize the effect of excessive acid and brings relief.
(b) When an ant bites it basically injects formic acid into the skin. Calamine solution contains zinc carbonate and is basic in nature. When applied in the skin, it reacts with the acid, and neutralizes its effect, thus giving relief
3 . factory waste is neutralised before disposing it into the water because the factory releases very harmful acids and toxic substances which kills the aquatic animals and also causes many health problems, so it is neutralised by some basic substances before disposing it to the water bodies.
4. Toothpaste is a base. It is alkaline in nature. In order to neutralize the acidic effect in our mouths, we use toothpaste to brush our teeth.