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(i) The pH value of an acid is ____ 7. (greater/less).

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Solution

(i) pH is abbreviated as the potential of hydrogen. It measures the concentration of Hydrogen ions $(H^{+})$ in an aqueous solution.
The pH value of an acid ranges from 0 to less than 6. The pH value of a base ranges from 8 to less than 14.
Hence, the pH value of acid is less than 7.

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