What is the Auto Ignition Temperature (AIT) of acetylene?

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Multiple Choice

What is the Auto Ignition Temperature (AIT) of acetylene?

Explanation:
Auto Ignition Temperature is the temperature at which a substance will ignite in air without an external flame or spark. For acetylene, this temperature is quite high—about 580°F (roughly 305°C). That means acetylene won’t ignite spontaneously at normal room temperatures; you’d have to heat it to around 580°F for autoignition to occur. So a statement claiming it is 0°F is incorrect, since 0°F is far below the ignition threshold. The other temperatures listed (100°F and 500°F) are also well below the actual autoignition point. The correct choice is the one that indicates it is not 0°F, reflecting that the true AIT is significantly higher.

Auto Ignition Temperature is the temperature at which a substance will ignite in air without an external flame or spark. For acetylene, this temperature is quite high—about 580°F (roughly 305°C). That means acetylene won’t ignite spontaneously at normal room temperatures; you’d have to heat it to around 580°F for autoignition to occur. So a statement claiming it is 0°F is incorrect, since 0°F is far below the ignition threshold. The other temperatures listed (100°F and 500°F) are also well below the actual autoignition point. The correct choice is the one that indicates it is not 0°F, reflecting that the true AIT is significantly higher.

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