Multiple choice general knowledge science & technology

A pH of below 7 indicates

  1. acidity

  2. presence of ion

  3. alkalinity

  4. purity of the sample
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A Correct answer
Explanation

The pH scale measures acidity and alkalinity. A pH of 7 is neutral, below 7 indicates acidity, and above 7 indicates alkalinity (basic). The lower the pH below 7, the stronger the acid. This is a fundamental concept in acid-base chemistry.

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