Chemistry - Metallurgy Question with Solution | TestHub

The total number of reactions among the following in which ${\mathrm{SO}}_2(\mathrm{g})$ is produced.

(i) Heating of green vitriol

(ii) Roasting of Fool's gold

(iii) White $\mathrm{P}+{\mathrm{SO}}_2{\mathrm{Cl}}_2$

(iv) Hypo + dil.HCl

(v) $\mathrm{Cu}+$ conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$

(vi) $\mathrm{Cu}+$ dil. ${\mathrm{H}}_2{\mathrm{SO}}_4$

(vii) Washing soda + dil. ${\mathrm{H}}_2{\mathrm{SO}}_4$

(viii) ${\mathrm{Cu}}_2\mathrm{O}+$ Chalcocite $+\Delta$