Nessler's Reagent
Nessler's reagent is used to detect:
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About This Question
- Subject
- chemistry
- Chapter
- principles related to practical chemistry
- Topic
- nessler's reagent
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Ammonia
Nessler's Reagent is an alkaline solution of Potassium tetraiodomercurate(II) (K2[HgI4]).
- It is used as a highly sensitive test for Ammonia (NH3) or Ammonium ions (NH4+).
- Reaction: Ammonia reacts with the reagent to produce a brown-colored precipitate of Iodide of Millon's base (NH2−Hg−O−Hg−I).
- This test is so sensitive that it can detect even trace amounts of ammonia in drinking water.
This easy difficulty chemistry question is from the chapter principles related to practical chemistry, covering the topic of nessler's reagent. It appeared in the 2025 exam.
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