Calculate $\left[\mathrm{H}_3 \mathrm{O}^{+}\right]$ of a monobasic acid if it is $0.04 \%$ dissociated in 0.05 M solution.

Identify an aromatic, mixed, $3^{\circ}$ amine among the following compounds.

Which of the following changes occurs during the discharging of lead accumulator?

Identify false statement form following.