JEE Mains · Chemistry · STD 12 - 5. Co-ordination chemistry
Given below are two statements: Statement \((I)\): A solution of \(\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}\) is green in colour. Statement \((II)\): A solution of \(\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}\) is colourless. In the light of the above statements, choose the most appropriate answer from the options given below:
- A Both Statement \(I\) and Statement \(II\) are incorrect
- B Both Statement \(I\) and Statement \(II\) are correct
- C Statement \(I\) is incorrect but Statement \(II\) is correct
- D Statement \(I\) is correct but Statement \(II\) is incorrect
Answer & Solution
Correct Answer
(B) Both Statement \(I\) and Statement \(II\) are correct
Step-by-step Solution
Detailed explanation
\(\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{+2} \rightarrow\) Green colour solution due to d-d transition. \(\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{-2} \rightarrow\) is diamagnetic and it is colourless.
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