Question

Coke is added during smelting:

• A. to reduce FeO to Fe
• B. to reduce $C{u}_{2}O$ to $Cu$
• C. to check the oxidation of $FeO$ to $F{e}_2{O}_3$
• D. to check the oxidation of $C{u}_{2}O$ to $CuO$

Answer 1

The correct option is C to check the oxidation of $FeO$ to $F{e}_2{O}_3$

SMELTING: The roasted ore is mixed with coke and silica (sand) and is introduced into a blast furnace. The hot air is blasted and FeO is converted into ferrous silicate ($FeSi{O}_3$).

Here coke is added to check further oxidation of iron and to remove it as slag.