Question

In four test tube A, B, C and D. Put small pieces of Mg, Zn, Cu and Fe in
tube A, B, C, D respectively. Now pour equal amount of dil. HCI in each.
Amange them in order of reactivity.​

Answer 1

Hii i am girl

mg >Zn >Fe>Cu

reaction

Mg + HNo3--------->Mg(No3)2 + H2

Zn + HNo3---------->Zn (No3)2 + H2

Fe + HNo3----------->Fe(No3)2 + H2

Cu + HNo3 ---------->Cu(No3)2 + H2

_______/\______☺️

hope it may helps you

Answer 2

Answer:

A=Mg= Mg+HCl=MgCl+H

B=Zn= Zn+HCl =ZnCl2 +H

C=Cu= no reaction

D=Fe=Fe+HCl=FeCl+H