Question

Name two substances having low ignition temperatures and two having high ignition temperatures.

Answer 1

The substance which have very low ignition temperature is also known as the non-flammable substance.
example - petrol, diesel, potassium, phosphorous etc.

Potassium and phosphorous have very low ignition temperature because it burns at the room temperature.

Coal has an ignition temperature of 600 Celsius making it the highest