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The Lassaigne’s extract is boiled with conc. HNO3 while testing for halogens. By doing so it
  • a)
    helps in the precipitation of AgCl
  • b)
    increases the solubility product of AgCl
  • c)
    increases the concentration of NO3ions
  • d)
    decomposes Na2S and NaCN, if formed
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
The Lassaigne’s extract is boiled with conc. HNO3 while testing ...
Na2S and NaCN, if present in the extract, will be decomposed to H2S and HCN by HNO3
NaCN + HNO3 → NaNO3 + HCN
Na2S + 2HNO3 → 2NaNO3 + H2S
These will escape from the solution and will not interfere with the test for halogens.
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The Lassaigne’s extract is boiled with conc. HNO3 while testing for halogens. By doing so ita)helps in the precipitation of AgClb)increases the solubility product of AgClc)increases the concentration of NO3–ionsd)decomposes Na2S and NaCN, if formedCorrect answer is option 'D'. Can you explain this answer? for NEET 2026 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about The Lassaigne’s extract is boiled with conc. HNO3 while testing for halogens. By doing so ita)helps in the precipitation of AgClb)increases the solubility product of AgClc)increases the concentration of NO3–ionsd)decomposes Na2S and NaCN, if formedCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The Lassaigne’s extract is boiled with conc. HNO3 while testing for halogens. By doing so ita)helps in the precipitation of AgClb)increases the solubility product of AgClc)increases the concentration of NO3–ionsd)decomposes Na2S and NaCN, if formedCorrect answer is option 'D'. Can you explain this answer?.
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