Question

What is/are the uses of Epsom salt?
(A) Pharmaceutical use
(B) Agricultural use
(C) Used as a brewing salt
(D) Used as a desiccant

Answer 1

Epsom salt is the hydrate magnesium sulphate. The water molecules will be varying from zero to seven. Commonly the Epsom formula will be $MgS{O_4}.7{H_2}O$ . The water molecules present are $7$ . It has so many uses in so many fields and has so many applications.

Complete answer:
Salt is the combination of an atom or ions. The ions are of two types, the first one is the positive ion called a cation and the negative ion is called an anion.
Magnesium is an element and it is an electropositive element and the charge is $+ 2$ . Sulphate group is anionic consisting of the charge of $- 2$ . Magnesium and sulphate form an inorganic compound called magnesium sulphate. The magnesium sulphate exists as a hydrated salt with the molecular formula $MgS{O_4}.x{H_2}O$ . The value of x varies with the value from $0$ to $7$ .
Epsom salt can be used as a pain reliever and used in pharmaceutical use.
Due to the presence of magnesium salts, it can be used for agricultural purposes.
It can also be used as a brewing salt and desiccant.
Thus, all the options are correct.

Note:
Some of the examples of brewing salts are gypsum and Epsom salt. Epsom salt can be used as a brewing salt, it can be added in mash or kettle in the brewing process. Desiccant is the substance that absorbs the moisture or water vapor. The magnesium sulphate salt absorbs water and can be used as a desiccant.