Question

Which of the following can be used to synthesize $S{O}_2$?

• A. $HgS+O_2$
• B. $ZnS+O_2$
• C. $Cu+H_{2}S$
• D. $N{a}_{2}S{O}_3+HCl$

Answer 1

Answer: (A), (B), (D)

The correct options are
A $HgS+O_2$
B $ZnS+O_2$
D $N{a}_{2}S{O}_3+HCl$

All the three reactions are used to prepare sulphur dioxide. $S{O}_2$ can be prepared

- By treating cinnabar with air
$HgS+O_2\to Hg+S{O}_2$

- In the extration of zinc from zinc sulphide
$2ZnS+3O_2\to 2ZnO+2S{O}_2$

- By adding dilute HCl into sodium sulphite
$N{a}_{2}S{O}_3+2HCl\to 2NaCl+S{O}_2$