Which among the following statements with regard to pH scale is are correct I It is a logarithm...........

General Science (Easy) Chemistry

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Which among the following statements with regard to pH scale is/are correct?

I. It is a logarithmic scale.

II. The scale is limited to 0-14 because the ionic product of water is about 10–14

III. The lower the value of pH, the greater is the acidity of the solution.

Select the correct answer using the code given below

I and II only

I, II and III

I and III only

II only

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Explanation:

I, II and III

pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.