Zine can be coated on iron to produce galvanize3d iron but the reverse is not possible it is because

Options

A. zine is lighter than iron
B. zine has lower mething point than iron
C. zine has lower negative electrode potential than iron
D. zine has higher negative electrode potential than iron

Answer

c

Explanation

`Zn^(2+) (aq) + 2 e^(-) to Zn(s)` `E_(Zn^(2+)//Zn)^(Theta) = 0.76 V`
` Fe^(2+) (aq) + 2 e^(-) to Fe (s)` `E_(Fe^(2+)//Fe)^(Theta) = 0.44 V`The lower the reduction potential , the great the tendency so get oxideted
Zine is mainly sue as an anticurrosion coating for iron .The adventage of galvanizing (zine plating ) is that the zine will be oxidized in perforence of the iron , even when same of the yron is exposed.