Question

Nessler's reagent is:

• A. $NaHgCl_{4}$
• B. $K_{2}HgI_{4}$
• C. $Hg(NH_{3})_{2}Cl$
• D. $K_{2}HfI_{4}+KOH$

Answer 1

Answer: (D)

$K_{2}HfI_{4}+KOH$

Answer 2

Nessler's reagent is $KOH+K_{2}HgI_{4}$ . It is used for the detection of $NH_{4}^{+}$ ion.