Match the following and choose the correct option.
| Column I | Column II |
| (a) Citric acid | (i) pH = 1.2 |
| (b) Water | (ii) pH = 2.2 |
| (c) Hydrochloric acid | (iii) pH = 10 |
| (d) Milk of magnesia | (iv) pH = 7 |
Answer & explanation
Correct answer: option 4
The correct answer is option 4. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii).
Acids have pH < 7 and base have pH > 7.
Neutral pH i.e., pH of water = 7
pH of citric acid = 2.2
pH of Hydrochloric acid (stronger) = 1.2
pH of Milk of magnesia [Mg(OH)2] = 10