Explanation

Chlorophyll is a compound that is called a Chelate. 

Photosynthesis depends on the presence of chlorophyll for the absorption of light.

There are about five closely related chlorophylls:

1. chlorophyll a
2. chlorophyll b
3. chlorophyll c
4. chlorophyll d
5. chlorophyll e
6. chlorophyll f

Explanation

For gas welding, a head of oxygen and acetylene are used for the process.

The required high temperature in the oxyacetylene welding process is obtained utilizing a mixture containing oxygen and acetylene gas. 

This process can also be used for cutting several materials.

Oxyacetylene: denotes welding or cutting techniques using a very hot flame produced by mixing acetylene and oxygen.