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Which of the following is not evidence of a chemical change?
  • a)
    Production of a gas
  • b)
    Change in color
  • c)
    Change in state (solid to liquid)
  • d)
    Formation of a precipitate
Correct answer is option 'C'. Can you explain this answer?
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Which of the following is not evidence of a chemical change?a)Producti...
A change in state (solid to liquid) (option C) is a physical change because the substance remains chemically the same (ice melting to water, for example). Options A, B, and D are evidence of chemical changes: production of a gas (option A) indicates a chemical reaction, change in color (option B) can indicate a change in chemical composition, and formation of a precipitate (option D) suggests a chemical reaction has occurred.
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