Define the terms "precipitation reaction" and "redox reaction". Label each of the following statements as true or false:
a) A precipitation reaction involves the formation of a solid from the mixing of two solutions. (True/False)
b) A redox reaction involves the transfer of electrons between reactants. (True/False)
c) An example of a redox reaction is the combustion of methane. (True/False)
d) A precipitation reaction always results in the formation of a gas. (True/False)