${\mathrm{SO}}_3$ gas is entering the environment at a constant rate of $6.93\times {10}^{-6}\mathrm{gm}/\mathrm{L}/\text{ day }$ due to the emission of polluting gases from thermal power plant, but at the same time it is decomposing and following first order kinetics with half life of 100 days. Based on above information, select the true statement(s).

Concentration of ${\mathrm{SO}}_3$ in Kota is $1.25\times {10}^{-5}\mathrm{M}$ (Assume ${\mathrm{SO}}_3$  present in Kota with constant concentration means rate of formation and dissociation of ${\mathrm{SO}}_3$ are equal).

An industry is manufacturing ${\mathrm{H}}_2{\mathrm{SO}}_4$ at the rate of 980 kg per day with the use of SO3 in air it should use $8\times {10}^5$ Litre air/day.

If ${\mathrm{SO}}_3$ emission is stopped then after 1000 days its concentrations will reduce to $\simeq 1.2\times {10}^{-8}\mathrm{M}$

If${10}^3\mathrm{L}$ of air is passed through 1 L pure water (assuming all ${\mathrm{SO}}_3$ to dissolved in it) and resulting solution is titrated against 1 N, NaOH solution of which 15 ml is consumed.