NTA Abhyas 2020
- Exam
- NTA Abhyas
- Year
- 2020
- Subject
- Chemistry
- Chapter
- General Principles and Processes of Isolation of Metals
NTA Abhyas 2020 · Chemistry · General Principles and Processes of Isolation of Metals
Gold is leached using CN^ − solution followed by reduction with Zn....
Gold is leached using {\text{CN}^{−} solution followed by reduction with What is the co-ordination number of in the final product?
Options
- A
- B6
- C
- D
Correct answer
D.
Step-by-step solution
\text{4Au}\text{+}{\text{8CN}^{−} \text{+}{\text{2H}_{2} \text{O}\text{+}{O}_{2} \to \text{4}{\left[\text{Au}{\left(\text{CN}\right)}_{2}\right]}^{−} \text{+}{\text{4OH}^{−}