Explanation of different incidents in terms of chemistry

 

A green mango is sour while a ripened mango is sweet

There remain various organic acids like succinic acid, malloic acid, etc in a green mango which makes it sour. As it ripens, these acids transform into glucose and fructose in chemical reactions and turns the mango sweet.

Burning of kerosene, natural gas and wax

The main component of these elements is hydrocarbon which is a composite form of carbon and hydrogen. When we burn them, carbon and hydrogen react with oxygen of air and produce carbon-di-oxide, vapour and heat.

Taking antacid due to acidity in stomach

Acidity occurs in stomach when excess hydrochloric acid is generared inside. Antacid contains  aluminum hydroxide [Al(OH)₃] and magnesium hydroxide [Mg(OH)₂] acid.

These incidents are sufficient to tell you that our life is irrevocably related to chemistry. Therefore, chemistry is one of the important branches of science.