Question

_ occurs when a substance unexpectedly bursts into flame and cause a serious fire​

Answer 1

Answer:

6 Spontaneous combustion. Spontaneous combustion is the phenomenon in which a hydrocarbon (or a chemical substance) substance unexpectedly bursts into flame without apparent cause. ... During this process, many hydrocarbons undergo slow oxidation that, like the rapid oxidation of burning, releases heat.

Answer 2

Answer:

chemical substance

Explanation:

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