Question

Addition of excess potassium iodide solution to a solution of mercuric chloride gives the halide complex
A. Tetrahedral, `K_(2)[HgI_(4)]`
B. Trigonal `K[HgI_(3)]`
C. Linear `Hg_(2)I_(2)`
D. Square planar `K_(2)[HgCl_(2)I_(2)]`

Answer 1

Correct Answer - A
`HgCl_(2)+4KI rarr K_(2)[HgI_(4)]+2KCl`
`Hg : [Xe]4f^(14)5d^(10)6s^(2)`