Consider the following chemical reaction

$\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2+{\mathrm{Na}}_2{\mathrm{SO}}_4⟶{\mathrm{PbSO}}_4+2{\mathrm{NaNO}}_3$

If a series of expertments are run maintaining sum of the weights of two reactant constant but varying the weights of reactants, which of the following statements is (are) true?

$\left[M_{{\left.\mathrm{Pb}\subset {\mathrm{NO}}_3\right)}_2}=394,M_{{\mathrm{Na}}_2{\mathrm{SO}}_4}=142\right]$

In the experiment, as the weight of $N{a}_{2}S{O}_4$ increases, weight of $ppt\left(PbS{O}_4\right)$ increases.

In the experiment, as the weight of $Pb(N{O}_3{)}_2$ increases, weight of $ppt\left(PbS{O}_4\right)$ increases and then decreases.

Maximum weight of the ppt $\left(PbS{O}_4\right)$ will be formed if equal moles of reactants are taken.

Maximum weight of the ppt $\left(PbS{O}_4\right)$ will be formed if equal weights of reactants are taken.