Question

Substances like phosphorus burns in air at room temperature. This type of combustion in which a material suddenly burst into flames, without application of any apparent cause, is called________.
1. Explosive combustion
2. Spontaneous combustion
3. Running combustion
4. Rapid combustion

Answer 1

Correct Answer - Option 2 : Spontaneous combustion

The correct answer is Spontaneous combustion.

• Spontaneous burning is when a substance catches fire as soon as its temperature reaches the ignition temperature.
  • White Phosphorus catches fire at room temperature of 35°C.

• Explosion combustion reaction that takes place suddenly with the evolution of heat light and sound.
  • In this case, a large amount of gas is evolved which gets liberated.
  • When a cracker is ignited it suddenly reacts and bursts.
• A rapid combustion is a form of combustion in which large amounts of heat and light energy are released.
  • This is used in a form of machinery, such as internal combustion engines, and thermobaric weapons.
  • The burning of LPG is an example of rapid combustion.

• Hydrocarbon fuels can undergo complete combustion or incomplete combustion, depending on the amount of oxygen available.