WBJEE · Chemistry · Coordination Compounds
Addition of excess potassium iodide solution to a solution of mereuric chloride gives the halide complex
- A tetrahedral \(\mathrm{K}_{2}\left[\mathrm{HgI}_{4}\right]\)
- B trigonal \(\mathrm{K}\left[\mathrm{Hg} \mathrm{I}_{3}\right]\)
- C linear \(\mathrm{Hg}_{2} \mathrm{I}_{2}\)
- D square planar \(\mathrm{K}_{2}\left[\mathrm{Hg} \mathrm{Cl}_{2} \mathrm{I}_{2}\right.\)
Answer & Solution
Correct Answer
(A) tetrahedral \(\mathrm{K}_{2}\left[\mathrm{HgI}_{4}\right]\)
Step-by-step Solution
Detailed explanation
\(\mathrm{HgCl}_{2}+4 \mathrm{KI} \longrightarrow \mathrm{K}_{2}\left[\mathrm{Hg} \mathrm{I}_{4}\right]+2 \mathrm{KCl}\) \(\mathrm{Hg}=[\mathrm{Xe}] 4 t^{14}, 5 d^{10} \mathrm{Gs}^{2}\) \[ \mathrm{Hg}^{2+}=[\mathrm{Xe}] 4{ }^{14}, 5 d^{10}, 6 \mathrm{s}^{\circ} \]
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