Comprehensive and Detailed Step-by-Step Explanation:
Definition of Highly Volatile Liquids:
Ahighly volatile liquidis defined as a liquid with alow boiling point, meaning it evaporates quickly and can create hazardous vapor concentrations.
PerNFPA 30 (Flammable and Combustible Liquids Code):
Liquids with a boiling pointbelow 68°F (20°C)are considered highly volatile.
Why 68°F (20°C) Matters:
Liquids with such a low boiling point vaporize readily at room temperature, posing significant fire and explosion hazards.
Other Options Explained:
Option B (70°F), Option C (100°F), and Option D (Greater than 212°F):
These values correspond to less volatile or moderately volatile liquids.
Summary:Ahighly volatile liquidis one with a boiling pointless than 68°F (20°C)due to its rapid evaporation and fire risk.
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