Question

Correct formula of ferric sulphate is

• A. ${\mathrm{FeSO}}_4$
• B. $\mathrm{Fe}{\left({\mathrm{SO}}_4\right)}_2$
• C. ${\mathrm{Fe}}_3{\left({\mathrm{SO}}_4\right)}_2$
• D. ${\mathrm{Fe}}_2{\left({\mathrm{SO}}_4\right)}_3$

Answer 1

The correct option is D

${\mathrm{Fe}}_2{\left({\mathrm{SO}}_4\right)}_3$

Explanation for correct option:

1. Valency of ferric ($\mathrm{Fe}$) = $+3$
2. Valency of sulphate (${\mathrm{SO}}_4$) = $-2$
3. Interchanging the valencies, we get a formula of ferric sulphate.
4. Thus the formula of ferric sulphate is ${\mathrm{Fe}}_2{\left({\mathrm{SO}}_4\right)}_3$

Hence, option (d) is correct.