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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).
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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
- An increase in equivalent conductance of a strong electrolyte
- 100 mL of HCl + 35 mL of NaOH, colour of methyl orange in the solution will be
- 40 mg of pure sodium peroxide is dissolved in 10L of distilled water. The pH of
- The oxidation numbers of hydrogen in KH,MgH₂ and NaH are respectively
- The compound which on reaction with aqueous nitrous acid at low temperature
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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