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      Question

      Which of the following apparatus is used to test the

      acidity of the aqueous solution?
      A Calorimeter Correct Answer Incorrect Answer
      B Lactometer Correct Answer Incorrect Answer
      C Hygrometer Correct Answer Incorrect Answer
      D pH meter Correct Answer Incorrect Answer

      Solution

      In aqueous solution, acidity is defined as pH below seven. Several methods can reveal presence, and extent, of acidic character. Titrations, indicator paper and digital pH meters can all determine pH, and therefore acidity of an aqueous solution.

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