Which of the following statements is correct?

Options

A. Anthracite and chalcocite are both ores of copper
B. Anthracite and chalcocite are both sulphide ores
C. Both German silver and horn silver have zero percent silver content
D. Malachite and azurite are both basic copper carbonate

Answer

D

Explanation

Malachite: `Cu(OH)_2.CuCO_3`
Azurite: `Cu(OH)_2. 2CuCO_3`
Anthracite is a variety of coal
Chalcocite is the `Cu_2S`
Horn silver:`AgCl`