Question

As per URDPFI guidelines acceptable limit of pH value for drinking water is:

• A. \(0 - 7\)
• B. \(4 - 8\)
• C. \(6.5 - 8.5\)
• D. \(2.5 - 6.5\)

Hint:

pH scale:
• pH \(< 7\) $\rightarrow$ Acidic
• pH \(= 7\) $\rightarrow$ Neutral
• pH \(> 7\) $\rightarrow$ Alkaline Safe drinking water generally falls within: \[ 6.5 - 8.5 \]

Answer 1

The Correct Option is C

Concept: The pH value of drinking water indicates whether the water is acidic, neutral, or alkaline. Maintaining an appropriate pH range is important because:
• Extremely acidic water may corrode pipes,
• Highly alkaline water may affect taste and usability,
• Proper pH ensures safe and potable drinking water. According to URDPFI guidelines and drinking water standards, potable water should remain within a safe pH range.

Step 1: Understand the acceptable pH range for drinking water.
The acceptable pH range for drinking water is: \[ 6.5 - 8.5 \] This range indicates water that is neither too acidic nor too alkaline.

Step 2: Analyze the given options.
• \(\mathbf{0 - 7}\) -- Includes extremely acidic values unsuitable for drinking water.
• \(\mathbf{4 - 8}\) -- Lower limit is too acidic for safe potable water.
• \(\mathbf{6.5 - 8.5}\) -- Correct acceptable pH range for drinking water. \checkmark
• \(\mathbf{2.5 - 6.5}\) -- Mostly acidic and unsuitable for drinking purposes. Therefore, the correct answer is: \[ {6.5 - 8.5} \]