A) Acid
B) Base
C) Salt
D) None of the above
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The correct answer B) Base
Milk of magnesia, also known as magnesium hydroxide, is an alkaline substance that is commonly used as a laxative and antacid. When dissolved in water, it releases hydroxide ions (OH-), which raise the pH of the solution and make it more alkaline. This makes Milk of magnesia a base.
Explanation
A) Acid: An acid is a substance that releases hydrogen ions (H+) in an aqueous solution. Examples of acids include hydrochloric acid and sulfuric acid. Milk of magnesia does not release hydrogen ions and therefore it is not an acid.
B) Base: A base is a substance that releases hydroxide ions (OH-) in an aqueous solution. Examples of bases include sodium hydroxide and potassium hydroxide. Milk of magnesia releases hydroxide ions and therefore it is a base.
C) Salt: Salt is a chemical compound that is formed when an acid and a base react. Examples of salts include sodium chloride (table salt) and calcium carbonate. Milk of magnesia is not a salt.
D) None of the above: This answer is incorrect as Milk of magnesia is a base and it fits in the category of the base from the options given.