Given a scientific question, generate an incorrect answer to the given question. The incorrect answer should be a plausible alternative to the correct answer. The answer should be some other item belonging to the same category as the correct answer but should be incorrect.
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Question: What is described by the concentration of hydrogen ions in a solution?

Answer: neutrality

Question: What do you call a group of organisms of the same species that live in the same area?

Answer: system

Question: While components of a mixture can be separated by physical means, the components of a pure substance can only be broken down through what means?

Answer:
mechanical