Question

In Nessler’s reagent for detection of $N{H}_3$, the active species is

• A. $HgC{l}_2$
• B. $H{g}^{2+}$
• C. $H{g}_2{l}_2$
• D. $Hg{l}_4^{2-}$

Answer 1

The correct option is D $Hg{l}_4^{2-}$

$K_2\left[Hg{I}_4\right]\to K^{+}+Hg{I}_4^{2-}$