He was involved in the development of the hydrogen bomb.

He hydrogenated fatty acids in a chemical experiment.

This compound is stabilized by hydrogenation.

Hydrogen sulphide is extremely toxic, and particularly at high concentrations, it is lethal to humans.

The underground water in this area is very clean and is used as drinking water.

I maintain my health by doing aerobic exercises every day.

This reaction occurs through a chemical process.

He is an excellent chemist who made many discoveries.

He is an expert in petrochemistry.

He is an expert in chemical analysis.