Fire is a/an ______ chain reaction.

Fire is a/an ______ chain reaction.

• A. Inhibited chain reaction
• B. Spontaneous chain reaction
• C. Uninhibited chain reaction
• D. Controlled chain reaction

Answer: (C)

Fire is a self-sustaining chemical chain reaction. The heat released from burning preheats more fuel and generates reactive intermediates that keep oxidation going, so the process propagates as long as fuel, heat, and oxygen are present. Because nothing inherently halts the reaction on its own and it continues to spread unless something interrupts it, this describes an uninhibited chain reaction. It requires an ignition source to start, and it isn’t inherently controlled unless someone manages it or employs extinguishing methods.

Fire is a self-sustaining chemical chain reaction. The heat released from burning preheats more fuel and generates reactive intermediates that keep oxidation going, so the process propagates as long as fuel, heat, and oxygen are present. Because nothing inherently halts the reaction on its own and it continues to spread unless something interrupts it, this describes an uninhibited chain reaction. It requires an ignition source to start, and it isn’t inherently controlled unless someone manages it or employs extinguishing methods.