The following reactions are connected with the extraction of iron or its properties

 The following reactions are connected with the extraction of iron or its properties

I 2Fe203(s) + 3CO(g) →4Fe(s) + 3CO2(g)

II CaO(s) + Sio(s)→ CaSiO3(3)

III 2Fe203(s) + 3C(s)->4Fe(s) + 3CO2(g)

IV 2Fe(OH)3(s)-> Fe2O3 (s) + 3H20(g)

Which reactions are reduction?

A. I, II and I

B, I and III

C. I and IV

D. II and I

E. II III and IV

The correct answer is B. I and III.

Explanation: This is oxidation reduction reaction. In I. Iron (III) oxide solid is reduced to solid iron metal. In III. Iron (III) oxide solid is also reduced to solid iron metal hence reduction reaction.

SOURCE: NECO CHEMISTRY 2001 QUESTION 7