Question

When $KI$ is added in the solution of $HgC{l}_2$ , the colour of the resultant solution is:

• A. blue
• B. red
• C. orange
• D. scarlet

Answer 1

Answer: (D)

$\underset{Scarlet}{HgC{l}_2+2KI\to Kg{I}_2+2KCl}$ $Hg{I}_2+2KI\to K_{2}Hg{I}_4$