The reaction of lead with Copper Chloride solution is an example for which type of chemical reaction? Why? Write the balanced chemical equation for this reaction.

Observe the diagram showing a copper rod kept immersed in silver nitrate solution.

a. What is the colour change of the solution?
b. Write the balanced chemical equation for the reaction.

Answer the following:

Why are highly reactive metals such as Aluminium is used as reducing agents?

Which of the following set of reactions will NOT occur?

I. ${\mathrm{MgSO}}_4\left(\mathrm{aq}\right) + \mathrm{Fe}\left(\mathrm{s}\right) \to {\mathrm{FeSO}}_4\left(\mathrm{aq}\right) + \mathrm{Mg}\left(\mathrm{s}\right)$

II. ${\mathrm{CuSO}}_4\left(\mathrm{aq}\right) + \mathrm{Fe}\left(\mathrm{s}\right) \to {\mathrm{FeSO}}_4\left(\mathrm{aq}\right) + \mathrm{Cu}\left(\mathrm{s}\right)$

III. ${\mathrm{MgSO}}_4\left(\mathrm{aq}\right) + \mathrm{Cu}\left(\mathrm{s}\right) \to {\mathrm{CuSO}}_4\left(\mathrm{aq}\right) + \mathrm{Mg}\left(\mathrm{s}\right)$

IV. ${\mathrm{CuSO}}_4\left(\mathrm{aq}\right) + \mathrm{Zn}\left(\mathrm{s}\right) \to {\mathrm{ZnSO}}_4\left(\mathrm{aq}\right) + \mathrm{Cu}\left(\mathrm{s}\right)$

Food cans are coated with tin and not with zinc because

Arrange the following according to the instructions given in bracket:

$\mathrm{K}, \mathrm{Pb}, \mathrm{Ca}, \mathrm{Zn}$. (In the increasing order of the reactivity)