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Question

Which of the following examples represents explosion?
  1. Burning of phosphorus in air at room temperature
  2. Burning of cooking gas
  3. Burning of matchstick
  4. Ignition of a cracker

A
Burning of phosphorus in air at room temperature
B
Ignition of a cracker
C
Burning of matchstick
D
Burning of cooking gas
Solution
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Ignition of a cracker is an example of explosion. When a cracker is ignited, large amount of heat, light, gas and sound are released due to a sudden reaction.

The burning of phosphorus in air at room temperature is an example of spontaneous combustion.

Burning of matchstick and burning of cooking gas are examples of rapid combustion.

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