Chemical formulas of compounds are one of the most important topics in school chemistry and competitive exams. Students of Class 9, Class 10, Class 11 are asked to write the correct chemical formula of common salts, acids, bases, oxides and organic compounds in exams. Learning these formulas helps in understanding chemical reactions, balancing equations and performing laboratory experiments. In this post you will find 125 important chemical formulas of compounds arranged in easy to revise table and useful for quick revision before exams.