No, but oxides are.
A glass bottle does not react to oxygen as it is an inert material. Therefore, it does not react with oxygen at all.
Glass is primarily made of silica, which is composed of silicon and oxygen atoms. Other elements are added to silica to create different types of glass with specific properties. While silicon and oxygen are key components, the exact composition of glass can vary depending on its intended use.
When a glass is placed over a candle, the candle flame burns up the available oxygen inside the glass. As the oxygen is used up, the flame is starved of oxygen and eventually goes out. This demonstrates the concept of oxygen depletion leading to extinguishing of the flame.
Glass/Sand Quartz
Oxygen and silica
If the glass jar is sealed, there is a limited amount of oxygen within it. Fire uses oxygen to stay alive. Once it uses up the limited amount of oxygen in the glass jar, it can no longer sustain flame. However, in the open, there is a theoretically unlimited amount of oxygen.
to eliminate contact of tungsten filament with oxygen
The burning flame on a candle needs three things to continue burning: 1) fuel, which it gets from the wick 2) heat, which comes from lighting the candle 3) oxygen Without any one or more of these three things, the candle will no longer continue to burn. In the case where a candle is covered with a glass, the candle quickly uses up the oxygen inside the glass. once all of the oxygen is gone, the flame will burn out.
When you cover the top of a glass with a burning candle inside, you restrict the flow of oxygen to the flame. This causes the flame to consume the available oxygen within the glass, leading to the extinguishing of the flame due to lack of oxygen. Additionally, the heat and gases produced by the burning candle may build up within the glass.
When a burning candle is covered with a glass, the oxygen within the covered space gets depleted as the flame consumes the available oxygen. Without sufficient oxygen, the candle flame is unable to sustain combustion and gets extinguished.
Some types of glass:Soda glass - silicon, oxygen, sodium, calciumLeaded glass - silicon, oxygen, lead, calciumetc.Many types of glass are contaminated with iron, which turns them brown. To solve this issue a "bleaching agent" is added to the glass, a few of these are: arsenic, manganese, boron. Glass containing manganese as the "bleaching agent" on extended exposure to sunlight eventually turns purple and is now a valued collectable as it is no longer made. Stained glass can have almost any metallic element added to get the desired color.
Placing a candle under a glass container will cause the flame to consume the oxygen inside the container. As the oxygen is used up, the flame will eventually extinguish due to lack of oxygen, creating a vacuum inside the container.