Which of the following liquids has the highest pH?
Answer & explanation
Correct answer: option 3
The correct answer is option 3. Milk of magnesia.
Among the options provided, the liquid with the highest pH is Milk of magnesia.
Milk of magnesia is a suspension of magnesium hydroxide in water. Magnesium hydroxide is a strong base, and it typically has a pH greater than 7, making it alkaline. Orange juice, lemon juice, and human blood are more acidic in nature, with lemon juice being particularly acidic due to citric acid.