Which of These Reactions Represents the Removal of Silica from Iron

question 41

Multiple Choice

Which of these reactions represents the removal of silica from iron ore in a blast furnace?

• A) SiO₂(s) → SiO₂(g)
• B) SiO₂(s) + CaO(s) → CaSiO₃(l)
• C) SiO₂(s) + 4HF(g) → SiF₄(g) + 2H₂O(g)
• D) SiO₂(s) + C(s) → Si(l) + CO₂(g)
• E) SiO₂(s) + CO(g) → SiCO₃(l)

---

Definitions:

Maturity Value

The sum paid to an investor at the conclusion of a predetermined investment period, encompassing both the original amount invested and the interest earned.

Compounded Monthly

The calculation of interest that adds the earned interest back to the principal sum each month, resulting in interest earnings on interest.

Population Growth

The increase in the number of individuals in a population, usually measured over a specific period and influenced by factors such as birth rates, death rates, and migration.

Expected Population

An estimation of a population size in the future based on current trends and changes.