A) \[Hg{{I}_{2}}\]
B) \[HgO\]
C) \[P{{b}_{3}}{{O}_{4}}\]
D) \[{{(N{{H}_{4}})}_{2}}C{{r}_{2}}{{O}_{7}}\]
Correct Answer: A
Solution :
[a] When KI is added to mercuric iodide it disssolve in it and form complex. \[\underset{\begin{smallmatrix} red,\,solid \\ (insoluble) \end{smallmatrix}}{\mathop{Hg{{I}_{2}}}}\,+KI\to \underset{(soluble)}{\mathop{{{K}_{2}}[Hg{{I}_{4}}]}}\,\] On heating \[Hg{{I}_{2}}\] decomposes as \[Hg{{I}_{2}}\rightleftharpoons Hg+\underset{\left( violet\text{ }vapours \right)}{\mathop{{{I}_{2}}}}\,\]You need to login to perform this action.
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