Which of the following has the lowest ignition temperature?
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Charcoal
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Cooking oil
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Kerosene oil
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Wood
C
Correct answer
Explanation
Kerosene oil has the lowest ignition temperature among the options - it vaporizes easily and catches fire at relatively low temperatures (approximately 210°C). Wood requires much higher temperatures (around 300°C), charcoal needs even higher heat, and cooking oil has a higher flash point (around 300-350°C) than kerosene. The ease of vaporization affects ignition temperature.