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In Lassaigne’s test a violet colour obtained indicates the presence of
Options
(a) nitrogen
(b) sulphur
(c) halogen
(d) none of the above
Correct Answer:
sulphur
Explanation:
S + 2Na → Na₂S. Na₂S + Na₂[Fe(NO)(CN)₅] (Sodium nitroprusside) → Na₄[Fe(CN)₅NOS] (violet or purple colour).
Related Questions: - Which one of the following ionic species has the greatest proton affinity to form
- Arrange the following in increasing order of acidity H₃PO₄ , H₂CO₃ , HCl , HI
- Which of the following cations has the maximum number of unpaired electrons
- When a mixture of solid Nacl and solid K₂Cr₂O₇ is heated with concentrated sulphuric acid
- Of the following complex ions one exhibits isomerism.That one is
Topics: Basic Principles of Organic Chemistry
(124)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which one of the following ionic species has the greatest proton affinity to form
- Arrange the following in increasing order of acidity H₃PO₄ , H₂CO₃ , HCl , HI
- Which of the following cations has the maximum number of unpaired electrons
- When a mixture of solid Nacl and solid K₂Cr₂O₇ is heated with concentrated sulphuric acid
- Of the following complex ions one exhibits isomerism.That one is
Topics: Basic Principles of Organic Chemistry (124)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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