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    Question

    If a solution changes the colour of blue litmus paper to

    red, what will the pH of this solution be?
    A less than 7 Correct Answer Incorrect Answer
    B 14 Correct Answer Incorrect Answer
    C more than 7 Correct Answer Incorrect Answer
    D 7 Correct Answer Incorrect Answer

    Solution

    If a solution turns blue litmus red, its pH is likely to be 6. When Blue paper turns red in acid, then the pH is less than 7.

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