Answer: Option (b) is the correct answer.
Explanation:
Neutral pH means a substance which is neither acidic nor basic and thus its pH is equal to 7.
Distilled water is the water from which all the impurities have been removed and it is the pure state of water. Therefore, pH of distilled water is equal to 7.
Distilled water is deionized water.
Whereas ground water has minerals so its pH is not neutral. Rain water will have acids dissolved in it and milk also contains lactic acid, therefore, there pH will be less than 7.
Thus, we can conclude that out of the given options, distilled water has a neutral pH.
