Which statement about flammable solids is true?

Which statement about flammable solids is true?

• A. They ignite readily and burn vigorously
• B. They are harmless
• C. They are only hazardous when inhaled
• D. They are used as coolants

Answer: (A)

Flammable solids have a strong tendency to ignite with very little energy and then burn rapidly. This means a small spark, friction, or brief contact with heat can start burning, and once it catches, the material tends to sustain vigorous flames. That combination—low energy needed to ignite and fast, intense burning—is what makes the statement true. The hazards aren’t limited to inhalation or to harmless materials, and these substances are not used as coolants; they require careful handling and storage away from ignition sources and incompatible materials.

Flammable solids have a strong tendency to ignite with very little energy and then burn rapidly. This means a small spark, friction, or brief contact with heat can start burning, and once it catches, the material tends to sustain vigorous flames. That combination—low energy needed to ignite and fast, intense burning—is what makes the statement true. The hazards aren’t limited to inhalation or to harmless materials, and these substances are not used as coolants; they require careful handling and storage away from ignition sources and incompatible materials.