# Solve this following

Question:

The pH of a $0.1$ molar solution of the acid $\mathrm{HQ}$ is 3 . The value of the ionization constant, Ka

of this acid is :-

1. $1 \times 10^{-7}$

2. $3 \times 10^{-7}$

3. $1 \times 10^{-3}$

4. $1 \times 10^{-5}$

Correct Option: , 4

Solution: