Number 4 is
-Oxidation occurs at the anode, while reduction occurs at the cathode. Recharging a battery involves the conversion of electrical energy to chemical energy. During recharging, there is movement of electrons from an external power source to the anode, and on the other side electrons are removed from the cathode.
Because it has no <span> stereogenic carbon centres.</span>
I would say : D) Newton's 3rd law of motion.
-Hope this helps.
Arkeisha is correct because the fluid in an alkaline battery has a ph between 7.1 and 14.0