Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 20231 FebruaryEvening Shift
Exam
JEE Main
Year
2023
Date
1 February
Shift
Evening Shift
Subject
Chemistry
Chapter
d and f Block Elements

JEE Main 2023 · 1 February · Evening Shift · Chemistry · d and f Block Elements

Which element is not present in Nessler’s reagent?

Which element is not present in Nessler’s reagent?

Options

  1. AMercury
  2. BPotassium
  3. CIodine
  4. DOxygen

Correct answer

D. Oxygen

Step-by-step solution

Nessler’s reagent, {K}_{2}\left[{HgI}_{4}\right] is used to detect ammonia. It is a pale solution that gets darker yellow when some amount of ammonia is added. A brown precipitate may form at a higher concentration. Nessler's reagent can be crystallized from a concentrated solution of mercury iodide with potassium iodide.

So, the correct option is D.

Practice d and f Block Elements on Quantrex Academy →

More from d and f Block Elements

Given below are two statements: Statement I: The number of pairs among [Ti^ 4+ , V^ 2+ ]… JEE Main 2026Given below are two statements for catalytic properties of transition metals. Statement… JEE Main 2026The correct order of first (Δ_i H_1) and second (Δ_i H_2) ionisation enthalpy values of… JEE Main 2026The correct statements among the following are. A. Basic vanadium oxide is used in the… JEE Main 2026Given below are two statements : Statement I: Presence of large number of unpaired… JEE Main 2026A paper dipped in a dil. H_2SO_4 solution of ' X ' upon treatment with SO_2 gas turns… JEE Main 2026Which of the following is NOT a physical or chemical characteristics of interstitial… JEE Main 2026Pairs of elements with the same number of electrons in their respective 4f orbital are… JEE Main 2026 Full d and f Block Elements list All JEE Main PYQs