Verified Solution • 2025–26 Session moderate

QAIPM-2011-Ch-1846: NEET 2011 Chemistry - Class 12 AIPM-2011-Ch-1846 Solution: The Lassaigne's extract is boiled with conc. \(HNO_3\) while…

The Lassaigne's extract is boiled with conc. HNO3HNO_3 while testing for halogens. By doing so it

Multiple Choice Options

  • A decomposes Na2SNa_2S and NaCN, formed
  • B helps in the precipitation of AgCl
  • C increases the solubility product of AgCl
  • D increases the concentration of N3−N_3^- ions

Step-by-Step Verified Solution

In case of Lassaigne�s test of halogens, it is necessary to remove NaCN and Na 2 S from the sodium extract, if nitrogen and sulphur are present. This is done by boiling the sodium extract with conc. HNO 3 . NaCN + HNO 3 _ NaNO 3 + HCN _ Na 2 S + 2HNO 3 _ 2NaNO 3 + H 2 S _

Related Learning Resources & Exam Preparation

NEET PYQ Question Bank
Browse year-wise authentic previous years' questions with solutions
Authentic CBT Mock Tests
Simulate official exam environment with live timer and percentile scoring