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Evidence of chemical reactions

Chemistry • Properties & Changes of Matter • Knowledge-Based • 1 questions

Evidence of chemical reactions Knowledge-Based Download PDF

Chemistry · Matter · Chemistry · Properties & Changes of Matter

1 Chemistry practice questions on Evidence of chemical reactions. Questions that assess core concepts and understanding.

Questions

  1. 1.

    When two clear, colorless aqueous solutions are mixed together at room temperature, which observation provides definitive evidence that a chemical reaction has taken place?

    • A) The total volume of the resulting mixture equals the sum of the initial volumes.
    • B) The temperature of the mixture remains unchanged throughout the process.
    • C) A bright yellow insoluble solid suddenly forms and settles at the bottom of the container.
    • D) The liquid components can be separated completely by simple physical distillation.