Can fire burn without oxygen?

No, fire by definition is a chemical reaction in which carbon combines with oxygen.

No there are three parts to the Fire Triangle.Collapse one side you said Oxygen and the fire dies.

A fire cannot burn without oxygen. You can show this for yourself, in fact: if you light a small candle and then put a clear glass upside-down over that candle (without touching the flame), you can watch the flame slowly extinguish as it uses up all of the oxygen that you have trapped around it with the glass.

Yes. All you need is an oxidizer. For example, you could have a fire with fuel, an ignition source and chlorine gas.

I would avoid that fire if I were you, by the way

A fire cannot exist without oxygen. There are elements such as magnesium which will burn without oxygen, but that is not considered fire. A fire requires oxygen.

No! This is something I understood was taught as part of high school chemistry. It is something called the fire triangle: The three requirements for fire, which are fuel (something to burn), a source of ignition (something that starts the fire), and oxygen (which sustains the fire). The principal of preventing or extinguishing fires is to remove any one of these three. A fire cannot burn without oxygen.

No

No

no

No