Question

arrange zinc,copper and iron in decreasing order of their reactivity

Answer 1

HELLO THERE!

Let me first tell you about the reactivity series of metals, in which, higher the position of the metal, higher is its reactivity. The series is:

K

Na

Ca

Mg

Al

Zn

Fe

Ni

Sn

Pb

H

Cu

Hg

Ag

Au

Pt.

This shows that Potassium is the most reactive metal, and Platinum is the least. Now let us check the positions of Zinc, copper and iron.

We see, that Zinc is above Iron, Iron is above copper.

So, Zinc is the most reactive among the three, and copper is the least reactive.

So, after arrangement in decreasing order of their reactivity (most reactive first):

Zn > Fe > Cu

This was your answer.

Hope this helps :)

Answer 2

Answer:

1.) Zinc

2.) Iron

3.) Copper