Saturated fatty acids may increase the risk of heart disease.

This compound is an unsaturated hydrocarbon.

Calcium carbide is a major raw material for acetylene gas.

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.

He was involved in the development of the hydrogen bomb.

Carbon monoxide is a colorless, odorless gas, and it is dangerous to inhale.

Carbon dioxide is one of the main causes of global warming.

Unsaturated fatty acids are said to be good for health.