Which of the following statement are correct?

Options

A. The mineral `KCl.MgCl_(2).6H_(2)O` is known as carnallite.
B. The chemical composition of malachite is `CuCO_(3).MgCO_(3)`
C. In Bayer's process of purifying aluminium ore the concentration of ore is done with `NaOH`.
D. Silver and gold are extracted from its ore by the Mc-Arthur-Forest cyanide process.

Answer

A,C,D