Wasp sting contains . ( Acid/ Base/ Salt)

1. Acids 

Acids produce ${\mathrm{H}}^{+}$ ions when they are dissolved in water.

2. Properties of Acids

(i) Acids are generally corrosive in nature and sour in taste

(ii) All dilute acids react with metallic oxides to form respective metallic salts and water.

(iii) Natural acids and organic acids are the two types of acids.

3. Uses of Acids

(i) Acetic acid and benzoic acid are used as food preservatives.

(ii) Sulphuric acid is known as king of chemicals.

4. Bases

Bases are the substances that give hydroxide ions $\left({\mathrm{OH}}^{-}\right)$ on dissolving in water.

5. Properties of Bases

(i) Bases which are soluble in water are called alkalis. All alkalis are bases but all bases are not alkalis.

(ii) Bases are generally corrosive in nature. They give soapy touch only in aqueous media.

6. Uses of Bases

Bases are used in paper industries, textile industries and in the preparation of medicines. They are used to manufacture fertilizers, nylon, plastics and rubber.

7. Neutralization reaction

When acids and bases are mixed together in aqueous solution, they react chemically to produce salt and water. This is known as neutralization reaction.

8. Indicators

An indicator is a chemical substance (either natural or artificial) which indicates the end of a chemical reaction by a suitable colour change.
Extracts of turmeric powder, hibiscus, beet root and vegetables are used as natural indicators. Phenolphthalein and methyl orange are artificial indicators.