Question

Which of the following reactions is called an explosion?
1 when gas burns slowly to produce only heat and light
2 when a material suddenly bursts into flames without any apparent cause
3 when a substance has very low ignition temperature and easily catches fire with a flame
4 when on ignition of a material a sudden reaction results in the production of heat, light, sound and gas

Answer 1

option 4

when on ignition of a material a sudden reaction results in the production of heat, light, sound and gas