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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: - There are two containers containing gases,one at pressure 30 atm and volume
- Acetylation of a secondary amine in alkaline medium yields
- Allyl chloride on dehydrochlorination gives
- The oxidation state of Cr in K₂Cr₂O₇ is
- Hydrolytic reaction of fats, with caustic soda, is known as
Topics: Basic Principles of Organic Chemistry
(124)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- There are two containers containing gases,one at pressure 30 atm and volume
- Acetylation of a secondary amine in alkaline medium yields
- Allyl chloride on dehydrochlorination gives
- The oxidation state of Cr in K₂Cr₂O₇ is
- Hydrolytic reaction of fats, with caustic soda, is known as
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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