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    Question

    Which of the following is a characteristic of

    acids?
    A Changes the color of blue litmus paper to red Correct Answer Incorrect Answer
    B Releases hydroxide ions (OH-) in water Correct Answer Incorrect Answer
    C Has a pH greater than 7 Correct Answer Incorrect Answer
    D Is a poor conductor of electricity Correct Answer Incorrect Answer

    Solution

    Acids turn blue litmus paper red due to their release of hydrogen ions (H+) in aqueous solutions. This is a defining characteristic used to identify acidic substances. The other options are incorrect because: acids release hydrogen ions, not hydroxide ions (which characterize bases); acids have pH values below 7 on the pH scale; and acids in aqueous solutions are good conductors of electricity due to the presence of ions that allow current flow.

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