Chemistry - Metallurgy Question with Solution | TestHub

Consider following statements :

(1) ${\mathrm{CO}}_2(\mathrm{g})+\mathrm{C}(\mathrm{s})\to 2\mathrm{CO}(\mathrm{g})$, It is endothermic reaction.

(2) In copper extraction from ${\mathrm{CuFeS}}_2,{\mathrm{CaSiO}}_3$ is main slag formed.

(3) Roasting of haematite ore is not done since it is not a sulphide ore

(4) $\mathrm{Cu}+{\mathrm{H}}_2{\mathrm{SO}}_4($ conc $)\to {\mathrm{CuSO}}_4+{\mathrm{H}}_2$

(5) During the extraction of Sn from ${\mathrm{SnO}}_2$ containing impurity CuS and FeS , controlled roasting is required

(6) Due to non-metallic impuritites melting point of iron is raised.

(7) In extraction of copper from copper pyrite, maximum amount of matte contain ${\mathrm{Cu}}_2\mathrm{S}$

if correct statements are 'x' and incorrect statements are 'y' then find the value of $\frac{Y}{X}=?$