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Friday, 9 October

NEET UG · Chemistry · Organic Chemistry - Some Basic Principles and Techniques

Lassaigne's Test for N and Halogens

NEET asked Lassaigne's Test for N and Halogens twice, in 2023 and 2025: 2 of the 1,875 questions in the 10 papers from 2017–2026. It belongs to Purification, Analysis and Isomerism of Organic Compounds, in Organic Chemistry - Some Basic Principles and Techniques (Chemistry). The longest wait between two papers asking it was 2 years.

Updated 2026-10-08

Times asked
2
in 2017–2026
Papers
2
of 10
First asked
2023
last in 2025
Chance next paper
6%
calibrated historical rate

Questions on this idea, by paper

2017–2026. 2023 and 2025.

0240’170’180’190’200’210’221’230’241’250’26

How NEET framed it

One-line MCQ is the usual form. Skill tested: recall.

  • Identify compound giving test
  • Identify reaction not part of a test

Chance asked next paper 6%

Every question

All 2 questions

From the official NEET UG papers, newest first. Open one for the full question, the options and the official answer.

Papers: NEET 2023, NEET 2025.

Same topic

Other ideas in Purification, Analysis and Isomerism of Organic Compounds

Purification, Analysis and Isomerism of Organic Compounds has 9 ideas NEET has asked; 2 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapter