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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 physical adsorption of gases on the solid surface is due to
- In which of the following hydrocarbons, hydrogen is most acidic
- The coordination number and oxidation number of X in the following compound [X(SO₄)(NH₃)₅]Cl
- Which of the following is not an azo dye
- Helium atom is two times heavier than a hydrogen molecule, the average kinetic energy
Topics: Basic Principles of Organic Chemistry
(124)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The physical adsorption of gases on the solid surface is due to
- In which of the following hydrocarbons, hydrogen is most acidic
- The coordination number and oxidation number of X in the following compound [X(SO₄)(NH₃)₅]Cl
- Which of the following is not an azo dye
- Helium atom is two times heavier than a hydrogen molecule, the average kinetic energy
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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