The ignition temperature of acetylene gas is

The ignition temperature of acetylene gas is
A . 581° F (305° C).
B . 425° F (218° C).
C . 350° F (177° C).
D . 325° F (163° C).

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Answer: A

Explanation:

Acetylene

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The ignition temperature of acetylene gas is 581° F (305° C). This is the minimum temperature required to ignite a gas or vapor in air without a spark or flame being present. The ignition temperature of acetylene gas varies according to composition, initial pressure, initial temperature, and water vapor content.As a typical example, an air mixture containing 30 percent acetylene by volume at atmospheric pressure can be ignited at about 581 °F (305°C)1.

References:Fuels and Chemicals – Autoignition Temperatures – The Engineering ToolBox;Ignition Temperatures and Group Classifications for Flammable Gases and Vapors;Is Acetylene Flammable? – Firefighter Insider;Ignition temperature acetylene – Big Chemical Encyclopedia;Acetylene Gas- its Characteristics and Safety Requirements