which of the following observation is not a chemical change
A) converting coal (coal is a form of carbon) to carbon dioxide
B) converting ion to steel (steel is an alloy of iron).
C) converting sulfur to acid rain (acid rain contains H2SO4)
D)converting H to water (H2O)
B), because alloys are not only mixtures of 2 metals, and do not undergo chemical change.
(this multiple choice question has been scrambled)