Anode mud refers to

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

The metals which can form amphoteric oxides with oxygen are:

Which of the following elements form basic oxides?

(a) an element with atomic number 10 (b) an element with atomic number 12

(c) an element with atomic number 16 (d) an element with atomic number 19