Chemistry - Metallurgy Question with Solution | TestHub

The ore cassiterite contains the impurity of$\mathrm{F}\mathrm{e},\mathrm{}\mathrm{M}\mathrm{n},\mathrm{}\mathrm{W}$and traces of Cu so removal of Fe and Cu etc are needed hence 3 and 4 are correct. As it is reduced by carbon reduction method so 2 is correct and 1 is wrong.
$\mathrm{S}\mathrm{n}{\mathrm{O}}_2+2\mathrm{C}\to 2\mathrm{C}\mathrm{O}+\mathrm{S}\mathrm{n}$