70. 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
A chemical reaction is likely to have occurred if the resulting mixture is liquid.
The formation of a liquid from a mixture of powders indicates that a chemical reaction may have taken place, as the interaction between the two substances can lead to a new state of matter, such as a solution.
A) homogeneous.
While a homogeneous mixture indicates uniformity, it does not inherently suggest that a chemical reaction has occurred. Powders can be mixed homogeneously without undergoing any chemical changes, meaning this option does not confirm a reaction.
B) liquid.
A liquid state suggests that a chemical reaction has likely occurred, especially if the original materials were solid powders. The transition to a liquid form often results from the formation of new compounds or the dissolution of one substance in another, indicating a chemical change.
C) stable.
Stability does not imply a chemical reaction has occurred; rather, it may indicate that the mixture remains unchanged over time. A stable mixture could still be a simple physical blend of powders without any chemical interaction taking place.
D) non-hazardous.
The classification of a mixture as non-hazardous does not provide any information about whether a chemical reaction has occurred. A mixture can be non-hazardous while still being the result of a physical combination of materials that have not reacted chemically.
Conclusion
The correct answer, indicating that a liquid formation suggests a chemical reaction, distinguishes it from the other options that either describe physical characteristics or stability without implying any chemical interaction. The ability of the powders to react and form a liquid emphasizes the transformative nature of chemical reactions, making Option B the most relevant answer.