CHEMISTRY_JEE Advance 2019_S2 - Competishun – Live JEE & NEET Courses and Exam Prep

JEE Advance 2019

Paper-2

Multiple correct answers - Select all that apply

Question

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

Select ALL correct options:

$\mathbf{T}$ is Zn

$\mathbf{R}$ is $\left[\mathrm{Au}(\mathrm{CN})_4\right]^{-}$

$\mathbf{Z}$ is $\left[\mathrm{Zn}(\mathrm{CN})_4\right]^{2-}$

$\mathbf{Q}$ is $\mathrm{O}_2$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

⚠ Partially correct. Some answers are missing.

Solution