Question 663Deck Safety70% to pass
Spontaneous combustion is caused by _______________.
AI Explanation
The correct answer is C) chemical action within a substance.
Spontaneous combustion occurs when a substance undergoes exothermic chemical reactions, generating enough heat to ignite the material without an external heat source. This happens when a substance, such as oily rags or hay, undergoes a slow oxidation process that builds up heat within the material until it reaches the ignition point. The chemical action within the substance is the root cause of spontaneous combustion, not an external heat source (A), or heat conduction through a wall (B).
The other options, while possible causes of ignition, do not accurately describe the mechanism of spontaneous combustion, which is the key focus of the question.
Related Questions
#661 The volatility of a flammable liquid is indicated by its _______________.#662 Spontaneous combustion is most likely to occur in _______________.#664 Which substance might be subject to spontaneous combustion? #665 What is the maximum oxygen content below which flaming combustion will no longer occur? #666 Storage batteries should be charged in a well ventilated area because _______________.