CORRECT answer is Barbituric ACID.The acid that can be used as a hypnotic is Barbituric acid. The chemical NAME of Barbituric acid is 6-hydroxyuracil.Its formula is C4H4N2O3.It is an organic compound. The synthesis of barbituric acid is done using malonic acid and urea.It is used as:A depressant for the nervous systemhypnotic purpose. A hypotonic solution is a solution that has a lower solute concentration as compared to another solution.Hypotonic is a CLASSIFICATION of the solute content of one solution in relation to another solution.Acid:An acid is a substance that is sour to taste.Turns blue LITMUS paper into the red.Contains replaceable hydrogen.Gives hydrogen ion (H+) in an aqueous solution.Can donate a proton.Can accept an electron. Tartaric acid:It is found in grapes.Uses of Tartaric acidSouring agent for pickles.A component of baking powder (sodium bicarbonate + tartaric acid).Butanoic acid is used as a raw material in the manufacture of esters of lower alcohols for use as flavoring agents.Benzoic acid is used in the manufacture of perfumes, dyes, topical medications, and insect repellents.