Which property of a pesticide increases its likelihood of moving with water in surface water?

• A. Low toxicity
• B. High solubility
• C. High viscosity
• D. Low volatility

Answer: (B)

The property that increases a pesticide's likelihood of moving with water in surface water is high solubility. When a pesticide has high solubility, it can readily dissolve in water, allowing it to be easily transported with water flow into surface waters such as rivers, lakes, or streams. This characteristic plays a significant role in the movement and dispersion of the pesticide in the environment, potentially affecting non-target organisms and ecosystems.

In contrast, low toxicity refers to the harm a pesticide may pose to living organisms, which does not directly influence its movement with water. High viscosity implies that the substance has a thick, sticky consistency, which can hinder its ability to flow with water. Low volatility indicates that the pesticide does not readily vaporize, affecting its presence in the air rather than its mobility with water. Therefore, high solubility is the key factor that facilitates a pesticide's movement through water bodies.