Home UPPSC Prelims 2025 Mock Test Series MCQs

Question

What does the pH scale measure?

  1. The concentration of salt in a solution
  2. The concentration of sugar in a solution
  3. The acidity or alkalinity of a solution
  4. The temperature of a solution

Answer:

Option C: The acidity or alkalinity of a solution

Detailed Solution:

The correct answer is “The acidity or alkalinity of a solution”.

The pH scale is used to specify the acidity or basicity (alkalinity) of an aqueous solution. A pH of 7 is neutral, pH less than 7 is acidic, and pH greater than 7 is basic.