Question

The cyanide process of gold extraction involves leaching out gold from its ore with CN^– in the presence of Q in water to form R. Subsequently, R is treated with T to obtain Au and Z. Choose the correct option(s)

(A)  Q is O₂

(B)  R is [Au(CN)₄]^– 

(C)   Z is [Zn(CN)4]^2– 

(D)  T is Zn

Answer 1

Correct option (A, C, D)

Explanation:

Extraction of gold is done by leaching with dil. solution of NaCN in the presence of air (O₂).