It is a chemical process - an oxidation.
Chemical
Chemical
This is a chemical property.
Combustibility is a chemical property.
is a Reacts with air a chemica or physical property
Thickness is a physical property without any relation with chemical composition or chemical changes.
It is a chemical property as air sensitive compounds react with oxygen or air to yield a different compound. Physical properties don't alter the composition of the compound but rather the behaviour through different molecular arrangement.
Ability to react with oxygen in the air is a chemical property.
Chemical property
It is a chemical property.
chemical
PHYSICAL
Air is a noun and not and adjective, hence it can not be a property. Gas would be a physical property describing air. Inert (for example) would be a chemical property.
Chemical property