Chemistry - Surface Chemistry Question with Solution | TestHub

Oxide layer formed initially on the massive form act as protective layer

Due to more surface area, the extent of reaction and the rate of reaction is more, liberating more heat in a shorter period causing explosion.

With powdered aluminium since the reaction takes place more in shorter period, explosion takes place due to increase in temperature as there is no time for the heat to dissipate into atmosphere.

Liquid oxygen is more reactive than gaseous oxygen