Wyoming Pesticide Applicator Practice Test 2025 – Complete Exam Prep

Question: 1 / 605

What property causes a chemical to evaporate?

Boiling point

Density

Viscosity

Vapor pressure

Vapor pressure is the property that causes a chemical to evaporate. This is because vapor pressure is a measure of the tendency of a substance to escape or vaporize from a liquid or solid state into the surrounding atmosphere. As for the other options, boiling point does not necessarily cause a chemical to evaporate as some chemicals can evaporate at room temperature. Density is a measure of the mass per volume and does not directly affect the ability of a substance to evaporate. Viscosity is the resistance of a fluid to flow and does not play a significant role in evaporation. Therefore, the best answer is option D, vapor pressure.

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