(a) Name the residue obtained on strongly heating the following: (i) ZnCO\(_3\) in an open crucible; (ii) CuSO\(_4\), 5H\(_2\)O and then allowing it to cool...

(a) Name the residue obtained on strongly heating the following:

(i) ZnCO\(_3\) in an open crucible;

(ii) CuSO\(_4\), 5H\(_2\)O and then allowing it to cool in a desiccator.

(b) State the colour changes observed on heating and cooling in each case in(a) above.