Question

Formula of Hematite

• A. ${\mathrm{Fe}}_2{\mathrm{O}}_3$
• B. ${\mathrm{Al}}_2{\mathrm{O}}_3$
• C. ${\mathrm{ZnCO}}_3$
• D. ${\mathrm{Na}}_3{\mathrm{AlF}}_6$

Answer 1

The correct option is A

${\mathrm{Fe}}_2{\mathrm{O}}_3$

Explanation for the correct option:

(A) ${\mathbf{Fe}}_{\mathbf{2}}{\mathbf{O}}_{\mathbf{3}}$

• Hematite is an ore of iron with the chemical name iron oxide from which iron can be extracted.

Explanation for the incorrect option:

(B) ${\mathrm{Al}}_2{\mathrm{O}}_3$ is named as Alumina, an ore of aluminium.

(C) ${\mathrm{ZnCO}}_3$ is named as Calamine, an ore of zinc.

(D) ${\mathrm{Na}}_3{\mathrm{AlF}}_6$ is named as Cryolite, an ore of aluminium.

Hence, the formula of Hematite is ${\mathbf{Fe}}_{\mathbf{2}}{\mathbf{O}}_{\mathbf{3}}$.

Therefore, option (A) is correct.