MCQ
In which of the following reaction element sulphur get reduced
- A$SO_3^{2 - } + C{r_2}O_7^{2 - } \longrightarrow SO_4^{2 - } + C{r^{ + 3}}$
- B${H_2}S + MnO_4^ - \longrightarrow M{n^{ + 2}} + S$
- ✓${H_2}S{O_4} + {I^ - } \longrightarrow {I_2} + S{O_2}$
- D$H_2SO_4 + 2NaOH \longrightarrow Na_2SO_4 + 2H_2O$
