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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 of the following C-H bonds has lowest bond dissociation energy
- An aqueous solution of glucose is 10% in strength. The volume in which 1g mole
- Carbylamine reaction is given by
- The atomic number of cobalt is 27. The EAN of cobalt in Na₃[Co(NO₂)₄Cl₂] is
- What is the value of electron gain enthalpy of Na+ if IE₁ of Na =5.1 eV ?
Topics: Basic Principles of Organic Chemistry
(124)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which of the following C-H bonds has lowest bond dissociation energy
- An aqueous solution of glucose is 10% in strength. The volume in which 1g mole
- Carbylamine reaction is given by
- The atomic number of cobalt is 27. The EAN of cobalt in Na₃[Co(NO₂)₄Cl₂] is
- What is the value of electron gain enthalpy of Na+ if IE₁ of Na =5.1 eV ?
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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