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Engineering Exams RRB-JE JE (Junior Engineer) CMA (Chemical and Metallurgical Assistant) DMS (Depot Material Superintendent) CS (Chemical Supervisor - Research) MS (Metallurgical Supervisor - Research) General Intelligence and Reasoning 2024 16.12.24 Paper-1 Shift-2 Medium +1 -0.33
What is the pH value of pure water at 25°C?
Correct Answer: B. 7
Explanation: At a standard temperature of 25°C, pure water is chemically neutral, meaning the concentration of hydrogen ions is equal to the concentration of hydroxide ions. This balance results in a hydrogen ion concentration of 10^-7 mol/L, which corresponds to a pH value of 7.
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