Question : Match of the following.
| Nature | Substances |
| 1. Acidic | a. Distilled water |
| 2. Basic | b. Carbonated drink |
| 3. Neutral | c. Soap |
Option 1: 1 - a, 2 - c, 3 - b
Option 2: 1 - b, 2 - c, 3 - a
Option 3: 1 - a, 2 - b, 3 - c
Option 4: 1 - c, 2 - a, 3 - b
Correct Answer: 1 - b, 2 - c, 3 - a
Solution : The correct answer is 1 - b, 2 - c, 3 - a.
Distilled water is neutral, the pH of pure, distilled water in a vacuum is 7, it is neither acidic nor alkaline and hence neutral. The carbonated drink is an acidic beverage that contains dissolved carbon dioxide, it contains acidic bicarbonate radical. Soap is the salt of sodium (sodium acetate), and Magnesium is basic. The soap contains an alkaline foaming system to protect the acidic secretion of human skin.
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