Which material is used for making the central rod in an electric cell?

a. copper b. carbon c. aluminium d. iron

B. Carbon

- The Cathode Is A Central Carbon Rod, Surrounded By A Mixture Of Carbon And Manganese (IV) Dioxide (Mn02).

answer; i believe the correct answer is (solid gold);

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e