Final answer:
Gas forming at Electrode #1 suggests a reduction reaction is occurring at that electrode, leading to the formation of a gas.
Step-by-step explanation:
If you see gas forming at Electrode #1, it typically means that the reduction of a compound is occurring at that electrode.
In the context of electrolysis, when a current is passed through a solution, the positive electrode is called the anode and the negative electrode is called the cathode.
Gas formation at Electrode #1 suggests that a reduction reaction is taking place, leading to the formation of a gas. For example, in the electrolysis of water, oxygen gas is formed at the anode.