Multiple Choice Question

Question

The list shows three substances and their chemical natures.

Substance Chemical Nature
milk of magnesia basic
distilled water neutral
lemon juice acidic


Which of the following correctly lists the substances from highest to lowest pH?

A.
lemon juice, distilled water, milk of magnesia

B.
distilled water, milk of magnesia, lemon juice

C.
lemon juice, milk of magnesia, distilled water

D.
milk of magnesia, distilled water, lemon juice

Answer 1

To arrange the substances from highest to lowest pH, we need to consider the chemical nature of each substance:

1. Milk of Magnesia: basic (high pH)
2. Distilled Water: neutral (pH around 7)
3. Lemon Juice: acidic (low pH)

Since basic substances have the highest pH, followed by neutral, and then acidic substances with the lowest pH, the correct order, from highest to lowest pH, is:

Milk of Magnesia (highest pH), Distilled Water (neutral pH), Lemon Juice (lowest pH)

Therefore, the correct answer is:

D. milk of magnesia, distilled water, lemon juice