### Условие задания:

1 Б.
Укажите, в каком ряду неверно записана последовательность различных форм (видов) уравнения ионной реакции:
${2\mathit{Na}}^{+}\phantom{\rule{0.147em}{0ex}}+\phantom{\rule{0.147em}{0ex}}{\mathit{SO}}_{4}^{2-}\phantom{\rule{0.147em}{0ex}}+\phantom{\rule{0.147em}{0ex}}{\mathit{Ba}}^{2+}\phantom{\rule{0.147em}{0ex}}+\phantom{\rule{0.147em}{0ex}}{2\mathit{Cl}}^{-}\phantom{\rule{0.147em}{0ex}}=\phantom{\rule{0.147em}{0ex}}{\mathit{BaSO}}_{4}↓\phantom{\rule{0.147em}{0ex}}+\phantom{\rule{0.147em}{0ex}}{2\mathit{Na}}^{+}\phantom{\rule{0.147em}{0ex}}+\phantom{\rule{0.147em}{0ex}}{2\mathit{Cl}}^{-}$,
${\mathit{Ba}}^{2+}\phantom{\rule{0.147em}{0ex}}+\phantom{\rule{0.147em}{0ex}}{\mathit{SO}}_{4}^{2-}\phantom{\rule{0.147em}{0ex}}=\phantom{\rule{0.147em}{0ex}}{\mathit{BaSO}}_{4}↓$,
${\mathit{Na}}_{2}{\mathit{SO}}_{4}\phantom{\rule{0.147em}{0ex}}+\phantom{\rule{0.147em}{0ex}}{\mathit{BaCl}}_{2}\phantom{\rule{0.147em}{0ex}}=\phantom{\rule{0.147em}{0ex}}{\mathit{BaSO}}_{4}↓\phantom{\rule{0.147em}{0ex}}+\phantom{\rule{0.147em}{0ex}}2\mathit{NaCl}$.