Chemistry - Redox Reactions Question with Solution | TestHub

$2\mathrm{HI}+{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{I}}_2+{\mathrm{SO}}_2+2{\mathrm{H}}_2\mathrm{O}$

$\mathrm{Ca}(\mathrm{OH}{)}_2+{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{CaSO}}_4+2{\mathrm{H}}_2\mathrm{O}$

$\mathrm{NaCl}+{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{NaHSO}}_4+\mathrm{HCl}$

$\begin{array}{rlr}& 2{\mathrm{PCl}}_5+{\mathrm{H}}_2{\mathrm{SO}}_4\to 2{\mathrm{POCl}}_3+2\mathrm{HCl}+& {\mathrm{SO}}_2{\mathrm{Cl}}_2\end{array}$