# In some solutions, the concentration of

Question:

In some solutions, the concentration of $\mathrm{H}_{3} \mathrm{O}^{+}$remains constant even when small amounts of

strong acid or strong base are added to them. These solutions are known as :-

1. Colloidal solutions

2. True solutions

3. Ideal solutions

4. Buffer solutions

Correct Option: , 4

Solution:

Solution not required