Praxis 5005 Practice Question
Which of the following is always true of a chemical change?
Correct Answer: C
Rationale: A chemical change always results in the formation of a new substance, which is why option C is accurate. This transformation can involve changes at the molecular level, producing substances with different properties.
Option A is incorrect because while color, shape, or texture may change, these alterations can also occur in physical changes. Option B is misleading; mass is conserved in chemical reactions, so it does not increase. Option D, while often true (as gases can be produced), is not universally applicable to all chemical changes, as some reactions may not produce gas or vapor.
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