0.01 moles of a weak acid HA $\left(K_a=2.0 \times 10^{-6}\right)$ is dissolved in 1.0 L of 0.1 M HCl solution. The degree of dissociation of HA is $\_\_\_\_$ $\times 10^{-5}$
(Round off to the Nearest Integer).
[Neglect volume change on adding HA. Assume degree of dissociation <<1]
