This individual is a very rare type of butterfly.

I like talking with my friends in private calls.

Calcium carbide is a major raw material for acetylene gas.

He was involved in the development of the hydrogen bomb.

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

This compound is stabilized by hydrogenation.

He hydrogenated fatty acids in a chemical experiment.

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

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

Unsaturated fatty acids are said to be good for health.