Five different kinds of electrodes and explain all

Explanation:

There are two types of electrodes, cathodes, and anodes. Cathode attracts the positively charged cations. Anode attracts negatively charged anions. Electrodes are commonly made of metals such as platinum and zinc.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

b) the inside picture would look at a very high temperature in a very low ph