In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.
Q: Hydrogen peroxide is a chemical compound with the formula H O. In its pure form, it is a pale blue, clear liquid, slightly more viscous than water. Hydrogen peroxide is the simplest peroxide (a compound with an oxygen -- oxygen single bond). It is used as an oxidizer, bleaching agent and antiseptic. Concentrated hydrogen peroxide, or 'high-test peroxide', is a reactive oxygen species and has been used as a propellant in rocketry. Its chemistry is dominated by the nature of its unstable peroxide bond.
A: 
what is the chemical composition of hydrogen peroxide