Question

Which of the following example (s) represents the explosion?
A.Burning of matchstick
B.Burning of cooking gas
C.Ignition of a cracker
D.Phosphorous burns in air at room temperature

Answer 1

Hint: We must have to know that the rapid expansion of gas is known as explosion. And during an explosion, there is a quick increase in the volume and a huge amount of energy is released in an extreme manner. This process is a chemical process, and here the mixture if compounds undergoes heat and it rearranges or it will decompose with uttermost quickness. Hence chemical explosion is an exothermic reaction.

Complete answer:
During the time of burning of match sticks, there is only a generation of heat because of the friction. And this heat will break the little part of the chain of red phosphorus. But, burning of match sticks is not an example of explosion. Hence, option (A) is incorrect.
Among the given options, burning of cooking gas is an example of explosion. Because while the burning of cooking gas, there is a release of a large amount of heat and energy. And this explosion process is known as rapid combustion. And the reason for this explosion may be leakage of gas in the presence of any flame or spark. Hence, option (B) is correct.
While the ignition of the cracker, there is a release of a huge amount of heat and light with high volume sound. And it is caused by a sudden reaction which takes place in the cracker. But it is not considered an explosion. Hence, option (C) is incorrect.
The burning of phosphorus in air at room temperature is not an explosion. Because, there is only releasing a small amount of energy. Hence, the option (D) is incorrect.

Hence, option (B) is correct.

Note:
We need to know that the explosion is a rapid reaction and which releases large amounts of energy, heat, sound and fire by the expansion of some gases. The explosion happens by a physical reaction or chemical reaction. The gases like, methane, propane, butane are the main gases which cause the explosion. And it is widely used for heating purposes. The gas explosions can be prevented by using natural gas detectors at home.