Burning characterstics of three substances are given below:
What type of combustion does X, Y and Z undergo?
A
X: Rapid combustion
Y : Rapid combustion
Z : Explosion combustion
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B
X: Spontaneous combustion
Y : Spontaneous combustion
Z : Rapid combustion
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C
X : Rapid combustion
Y : Spontaneous combustion
Z : Explosion combustion
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D
X : Explosion combustion
Y : Spontaneous combustion
Z : Rapid combustion
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Solution
The correct option is C X : Rapid combustion
Y : Spontaneous combustion
Z : Explosion combustion ∙ When a substance undergoes combustion quickly, it is said to have undergone rapid combustion. So, X has undergone rapid combustion. ∙ When a substance undergoes combustion without the help of any external agent, it is called spontaneous combustion. Hence, Y has undergone spontaneous combustion. ∙ When a substance burns with the evolution of a lot of heat, light, sound and gases it is called an explosion. Therefore, Z has undergone explosion.