Substances like phosphorus burns in air at room temperature. This type of combustion in which a material suddenly bursts into flames, without application of any apparent cause, is called _____________

Correct option is B

• Spontaneous combustion occurs when a material bursts into flames without the need for an external ignition source, such as a match or spark.
• This happens when the material's temperature rises to its ignition point due to internal chemical reactions, even at room temperature.

• Spontaneous combustion occurs often due to oxidation or chemical reactions within the material.

• Phosphorus is highly reactive and can ignite spontaneously in air due to its low ignition temperature.

• Common examples include substances like phosphorus, coal dust, and oily rags that can undergo spontaneous combustion.

• Conditions for spontaneous combustion: It usually requires highly reactive materials and sufficient oxygen to cause a rise in temperature.

•  Explosive combustion: Refers to a violent combustion process, typically with explosive materials like gunpowder.

•  Rapid combustion: Involves fast burning but usually requires an external heat source.