The compound formed when gypsum is dissolved in aqueous ammonium sulphate solution, is
- $\mathrm{CaSO}_4 \cdot \mathrm{NH}_4 \mathrm{Cl} \cdot \mathrm{H}_2 \mathrm{O}$
- $\mathrm{CaCl}_2 \cdot\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 \cdot \mathrm{H}_2 \mathrm{O}$
- $\mathrm{CaSO}_4\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 \cdot 2 \mathrm{H}_2 \mathrm{O}$
- $\mathrm{CaCl}_2 \cdot \mathrm{NH}_4 \mathrm{Cl} \cdot 2 \mathrm{H}_2 \mathrm{O}$
Asked in: AP EAMCET 2002