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    Question

     Which of the following will turn blue litmus red ?

    A Washing soda solution Correct Answer Incorrect Answer
    B Vinegar Correct Answer Incorrect Answer
    C Baking soda solution Correct Answer Incorrect Answer
    D More than one of the above Correct Answer Incorrect Answer
    E None of the above Correct Answer Incorrect Answer

    Solution

    Explanation: Acidic substances turn blue litmus paper red. Vinegar (acetic acid) is acidic in nature, whereas washing soda (sodium carbonate) and baking soda (sodium bicarbonate) are basic and would turn red litmus blue instead.

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