Which term describes a chemical that, in the pure state, or as produced or transported, will vigorously polymerize, decompose, condense, or become self-reactive under shocks, pressure, or temperature?

Which term describes a chemical that, in the pure state, or as produced or transported, will vigorously polymerize, decompose, condense, or become self-reactive under shocks, pressure, or temperature?

• A. Unstable
• B. Stable
• C. Inert
• D. Nonreactive

Answer: (A)

Understanding chemical stability under handling conditions helps explain why this term fits. A chemical described as unstable is one that will vigorously polymerize, decompose, condense, or become self-reactive when subjected to shocks, pressure, or temperature. This signals a high risk of sudden, violent change, which is exactly what the description is getting at and is why it guides precautions in production, storage, and transport—such as controlling heat, avoiding mechanical impacts, and keeping it away from incompatible materials. In contrast, stable means the substance resists these dangerous changes; inert and nonreactive describe a lack of reactivity with other substances rather than an internal tendency to react or change on its own.

Understanding chemical stability under handling conditions helps explain why this term fits. A chemical described as unstable is one that will vigorously polymerize, decompose, condense, or become self-reactive when subjected to shocks, pressure, or temperature. This signals a high risk of sudden, violent change, which is exactly what the description is getting at and is why it guides precautions in production, storage, and transport—such as controlling heat, avoiding mechanical impacts, and keeping it away from incompatible materials. In contrast, stable means the substance resists these dangerous changes; inert and nonreactive describe a lack of reactivity with other substances rather than an internal tendency to react or change on its own.