A) \[BaS{{O}_{4}}.2{{H}_{2}}O\]
B) \[CaS{{O}_{4}}.{{H}_{2}}0\]
C) \[MgS{{O}_{4}}-2{{H}_{2}}O\]
D) \[MgS{{O}_{4}}.7{{H}_{2}}O\]
Correct Answer: D
Solution :
\[\text{MgS}{{\text{O}}_{\text{4}}}\text{.7}{{\text{H}}_{\text{2}}}\text{O}\]known as epsom salt. It is used as purgative in medicines for fire proofing of paper and cotton and in dyeing and tanning processes.
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