Q14 / 90 · JEE Main 2023 (06 Apr Shift 2) · Chemistry

Element not present in Nessler’s reagent is

Correct answer
A
$N$
B
$Hg$
C
$I$
D
$K$

Solution

Nessler's reagent is an aqueous solution of potassium iodide, mercuric chloride, and potassium hydroxide. Its chemical formula is $K_{2} {HgI}_{4}$ . It is used to detect the presence of ammonia. It turns into pale brown colour in presence of ammonia.
So, $N$ is not present in Nessler's reagent.

Hence, the correct answer is option: 'A'.

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