The correct answer is A. Epsom salt is used as a purgative.
Epsom salt is a naturally occurring mineral compound of magnesium and sulfate. It is named after the town of Epsom in Surrey, England, where it was originally discovered. Epsom salt is a white, odorless, and tasteless powder that is soluble in water. It is commonly used as a home remedy for a variety of conditions, including constipation, muscle cramps, and headaches. Epsom salt is also used in cosmetics and bath products.
B. Epsom salt is not used in softening water. Water softeners use a variety of methods to remove minerals from water, including ion exchange, reverse osmosis, and distillation. Epsom salt is not effective in removing minerals from water.
C. Epsom salt is not used in the paper industry. The paper industry uses a variety of chemicals to produce paper, including wood pulp, water, and chemicals such
as chlorine, sulfur, and sodium hydroxide. Epsom salt is not one of the chemicals used in the paper industry.D. Epsom salt is not used in making toothpaste. Toothpaste is made from a variety of ingredients, including abrasives, fluoride, and flavorings. Epsom salt is not one of the ingredients in toothpaste.