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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: - The percentage strength (in g litre⁻¹) of 10 mL of 20 vol.solution of H₂O₂ is
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Topics: Basic Principles of Organic Chemistry
(124)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The percentage strength (in g litre⁻¹) of 10 mL of 20 vol.solution of H₂O₂ is
- A gas mixture contains 50% He and 50% Methane by volume. What is the percent
- Molar conductivity decreases with decrease in concentration
- Silver sulphide dissolves in a solution of sodium cyanide to form the complex
- An aldehyde can undergo the aldol condensation having
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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