In an experiment, the group that is expossed to the variable to be tested is called what

An experimental group

Explanation:

An experimental group is a test sample or the group that receives an experimental procedure. This group is exposed to changes in the independent variable being tested.

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.