In dry cell, what acts as a negative electrode?

Options

A. Zinc
B. Graphite
C. Ammonium chloride
D. Manganese dioxide

Answer

A

Explanation

In a dry cell, zinc acts as a negative electrode.
In this cell, the outer zinc container is the negatively charged terminal.
At anode (negative terminal)
`Zn (s)to Zn^(2+) (aq)+ 2e^-`
At cathode (positive terminal)
`2MnO_2+2e^-+2NH_4Cl(aq)toMn_2O_3(s)+2NH_3(aq)+H_2O(l)+2Cl^-`