Consider the following statements `:`
`S_(1) :` In extration of iron from haematite ore, the reduction reactions take place only in the lower temperature range in the blast furnace.
`S_(2) :` Calamine in an carbonate ore of zince.
`S_(3) :` The principle ore of aluminium , bauxite , usually contains silica, iron oxides and titanium oxide as impurities.
`S_(4) :` Solidified copper obtained from silica lined conventor ( Bessemer converter ) has blistered appearance due to the evolution of `SO_(2)`.
and arrange in the order of true `//` false.

Options

A. `F T T T`
B. `F T F F `
C. `F F T T `
D. `T F F T`

Answer

1

Explanation

`S_(1) : ` At `500-800K (` lower temperature range in the furnace `)`
`3Fe_(2)O_(3)+CO rarr2Fe_(3)O_(4)+CO_(2)`
`Fe_(3)O_(4)+CO rarr3Fe+4CO_(2)`
`Fe_(2)O_(3)+COrarr2FeO+CO_(2)`
At `900-1500K (` higher temperature range in the blast furnance `) : FeO+CO rarrFe+CO_(2)`
`S_(2) :` calamine is `ZnCO_(3)`
`S_(3) : `It contains `Fe_(2)O_(3),SiO_(2)` and `TiO_(2)` as impurities.
`S_(4) : `The surface of solidified copper has blistered like appearance due to the evolution of `SO_(2)` and so it is called blister copper.