Q3 / 180 · COMEDK 2023 (Morning Shift) · Chemistry
Mohr's salt has the formula
- A$\mathrm{FeSO}_4 \cdot 7 \mathrm{H}_2 \mathrm{O}$
- B$\mathrm{Fe}\left(\mathrm{SO}_4\right)_3\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 \cdot 6 \mathrm{H}_2 \mathrm{O}$
- C$\mathrm{MgSO}_4 \cdot 7 \mathrm{H}_2 \mathrm{O}$
- Correct answerD$\mathrm{FeSO}_4\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 \cdot 6 \mathrm{H}_2 \mathrm{O}$
Solution
Mohr's salt is a double salt known as ferrous ammonium sulfate. Its chemical formula is $\mathrm{FeSO}_4 \cdot (\mathrm{NH}_4)_2 \mathrm{SO}_4 \cdot 6 \mathrm{H}_2 \mathrm{O}$.
Comparing this with the given options, the correct formula corresponds to $\mathrm{FeSO}_4(\mathrm{NH}_4)_2 \mathrm{SO}_4 \cdot 6 \mathrm{H}_2 \mathrm{O}$.
Answer: $\mathrm{FeSO}_4\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 \cdot 6 \mathrm{H}_2 \mathrm{O}$
Comparing this with the given options, the correct formula corresponds to $\mathrm{FeSO}_4(\mathrm{NH}_4)_2 \mathrm{SO}_4 \cdot 6 \mathrm{H}_2 \mathrm{O}$.
Answer: $\mathrm{FeSO}_4\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 \cdot 6 \mathrm{H}_2 \mathrm{O}$
Hence, the correct answer is option: 'D'.