Question

State the colour of the residue obtained on cooling when the following carbonates are heated : 

1. zinc carbonate 

2. lead carbonate 

3. copper carbonate

Answer 1

1. In case of zinc carbonate, residue is yellow when hot and White when cold

2. In case of lead carbonate, residue is reddish-brown when hot and yellow when cold

3. In case of Copper carbonate, residue is black when cold.