21. Two powders have been mixed together to prepare a nonsterile compound. A chemical reaction is likely to have occurred if the resulting mixture is:
Answer: B
The resulting mixture is likely to be a liquid.
A chemical reaction is likely to have occurred if the resulting mixture is in a liquid state, indicating that the powders have undergone a transformation that alters their physical state.
A) homogeneous
While a homogeneous mixture indicates that the components are evenly distributed, it does not necessarily imply that a chemical reaction has occurred. Powders can mix homogeneously without undergoing any chemical change.
B) liquid
The formation of a liquid from the mixing of two powders suggests that a chemical reaction may have taken place, as this transformation can indicate new substances are formed that have different physical properties from the original powders.
C) stable
Stability refers to the mixture's ability to maintain its composition over time without change. A stable mixture does not guarantee that a chemical reaction has occurred; rather, it may simply mean that the original powders have not reacted.
D) non-hazardous
The classification of a mixture as non-hazardous relates to its safety for handling and use, which does not provide information about whether a chemical reaction has occurred. Non-hazardous does not imply that a change in composition has taken place.
Conclusion
The answer B, indicating that the mixture is liquid, is correct as it suggests that a chemical reaction has transformed the original powders. All other options focus on characteristics that do not directly imply a chemical change, such as the state of uniformity, stability, or safety, thereby failing to address the core concept of the question.