Which of the following is NOT one of the 12 Principles of Green Chemistry?

The principle of "Preferential Use of Hazardous Chemicals" is indeed not one of the 12 Principles of Green Chemistry. Green Chemistry aims to minimize the use and generation of hazardous substances throughout the chemical process, promoting the safe and efficient handling of chemicals.

In contrast, the other principles listed focus on promoting safer and more sustainable practices in chemistry. For example, "Design for Energy Efficiency" encourages chemists to reduce energy consumption and utilize energy sources that are sustainable and renewable. "Promotion of Chemical Safety" emphasizes reducing chemical hazards and risks to human health and the environment, while "Reuse of Solvents and Chemicals" focuses on minimizing waste and maximizing resource efficiency by reusing materials whenever possible.

Thus, the goal of Green Chemistry is to support practices that prioritize safety and sustainability rather than the use of hazardous substances. This understanding highlights the importance of avoiding options that contradict these core values.