Magnesium tetraoxosulphate(VI) salt is commonly used as a

Analysis

The question asks for the common application of Magnesium tetraoxosulphate(VI), which is chemically represented as $\text{MgSO}_4$. This compound is more commonly known as Epsom salt.

Concept Explanation

To identify the correct use, we look at the properties and common household/medical uses of $\text{MgSO}_4$:

• Chemical Nature: It is a hydrated salt containing magnesium, sulfur, and oxygen.
• Medical/Biological Application: Magnesium sulfate is widely recognized in pharmacology for its ability to draw water into the intestines through osmosis. This action softens the stool and stimulates bowel movements.
• Other uses: While it is sometimes used in agriculture (as a magnesium supplement for plants), its most prominent and direct "common" use in a medical context is as a saline laxative.

Step-by-Step Solution

1. Identify the compound: Magnesium tetraoxosulphate(VI) is $\text{MgSO}_4 \cdot 7\text{H}_2\text{O}$ (Epsom salt).
2. Evaluate the options: • A. Disinfectant: Substances like chlorine or hydrogen peroxide are used for this. $\text{MgSO}_4$ does not kill bacteria. • B. Plasticizer: These are additives used to increase the flexibility of plastics (e.g., phthalates). $\text{MgSO}_4$ is an inorganic salt, not a plasticizer. • C. Fertilizer: While magnesium is a nutrient for plants, it is not the primary or "common" definition for this salt in the context of standard chemistry examinations compared to its medical use. • D. Laxative: $\text{MgSO}_4$ is a well-known saline laxative used to treat constipation.

Conclusion

Based on standard pharmaceutical and chemical classifications, Magnesium tetraoxosulphate(VI) is primarily classified as a laxative.

Exam Tip

When you see "tetraoxosulphate(VI)," remember that this is the IUPAC name for "sulfate." Whenever you encounter Epsom salt ($\text{MgSO}_4$) in an exam, immediately associate it with its medical use as a laxative to relieve constipation.