In the NFPA 704 system, the quadrant color that deals with reactivity is colored:

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Multiple Choice

In the NFPA 704 system, the quadrant color that deals with reactivity is colored:

Explanation:
Reactivity is shown in the yellow quadrant. In the NFPA 704 diamond, each color represents a hazard type: blue is health, red is flammability, yellow is reactivity, and white covers special hazards. The yellow section communicates how likely a material is to undergo chemical changes under normal or slightly upset conditions, such as reacting violently, producing gases, or detonation. The numbers in that quadrant (0–4) indicate the severity. So the correct color for reactivity is yellow, while blue and red indicate health and flammability, and white is for special hazards.

Reactivity is shown in the yellow quadrant. In the NFPA 704 diamond, each color represents a hazard type: blue is health, red is flammability, yellow is reactivity, and white covers special hazards. The yellow section communicates how likely a material is to undergo chemical changes under normal or slightly upset conditions, such as reacting violently, producing gases, or detonation. The numbers in that quadrant (0–4) indicate the severity. So the correct color for reactivity is yellow, while blue and red indicate health and flammability, and white is for special hazards.

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