Which of the following involves electrochemnical phenomenon?

Options

A. The transmission of sensory singnals through cell to brain and vice cersa and communication between the cells
B. Manufacture of fluorine
C. Refining of metal copper
D. All of these

Answer

D

Explanation

Many reactions that take place in living cells are redox reactions. These reaction can be studied with mini-ture electrodes. Element fluorine is manufacured by the electrolysis of a solution of `KHF_(2)` in anhydrous `HF`:
`K[HF_(2)]+Hfoverset("electrolysis") rarr H_(2)+F_(2)`
Metal copper is refined by electrolysis using `Cu` electrodes with an electrolyte of dilute `H_(2)SO_(4)` and `CuSO_(4)`.