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Which of the following compounds gives blood red coloration when its Lassaigne's extract is treated with alkali and ferric chloride?
- a)Thiourea
- b)Diphenyl sulfide
- c)Phenyl hydrazine
- d)Benzamide
Correct answer is option 'A'. Can you explain this answer?
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Which of the following compounds gives blood red coloration when its L...
Lassaigne's test gives red blood colour in which the substance cantains SCN .so option A
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Which of the following compounds gives blood red coloration when its L...
Answer:
Lassaigne's Extract:
Lassaigne's extract is an organic compound obtained by treating the organic substance with sodium metal. It is used to detect certain functional groups present in organic compounds.
Alkali and Ferric Chloride Test:
The alkali and ferric chloride test is used to detect the presence of sulfur in an organic compound. When the Lassaigne's extract of an organic compound is treated with alkali (sodium hydroxide) and ferric chloride, a blood red coloration is observed if the compound contains sulfur.
Explanation:
Among the given options, the compound that contains sulfur is Thiourea (Option A). Thiourea is an organic compound with the formula SC(NH2)2. It contains a sulfur atom bonded to two amino groups. When the Lassaigne's extract of Thiourea is treated with alkali and ferric chloride, a blood red coloration is observed. This is due to the formation of a complex between the sulfur atom in Thiourea and ferric chloride.
The reaction can be represented as follows:
2SC(NH2)2 + 6NaOH + 2FeCl3 → [Fe(SC(NH2)2)3]3- + 6NaCl + 6H2O
The blood red coloration is a characteristic test for the presence of sulfur in organic compounds. The complex formed between the sulfur atom and ferric chloride is responsible for the coloration.
Therefore, when the Lassaigne's extract of Thiourea is treated with alkali and ferric chloride, it gives a blood red coloration, indicating the presence of sulfur in the compound.
Conclusion:
Thiourea is the compound that gives a blood red coloration when its Lassaigne's extract is treated with alkali and ferric chloride. This coloration is due to the formation of a complex between the sulfur atom in Thiourea and ferric chloride.
Lassaigne's Extract:
Lassaigne's extract is an organic compound obtained by treating the organic substance with sodium metal. It is used to detect certain functional groups present in organic compounds.
Alkali and Ferric Chloride Test:
The alkali and ferric chloride test is used to detect the presence of sulfur in an organic compound. When the Lassaigne's extract of an organic compound is treated with alkali (sodium hydroxide) and ferric chloride, a blood red coloration is observed if the compound contains sulfur.
Explanation:
Among the given options, the compound that contains sulfur is Thiourea (Option A). Thiourea is an organic compound with the formula SC(NH2)2. It contains a sulfur atom bonded to two amino groups. When the Lassaigne's extract of Thiourea is treated with alkali and ferric chloride, a blood red coloration is observed. This is due to the formation of a complex between the sulfur atom in Thiourea and ferric chloride.
The reaction can be represented as follows:
2SC(NH2)2 + 6NaOH + 2FeCl3 → [Fe(SC(NH2)2)3]3- + 6NaCl + 6H2O
The blood red coloration is a characteristic test for the presence of sulfur in organic compounds. The complex formed between the sulfur atom and ferric chloride is responsible for the coloration.
Therefore, when the Lassaigne's extract of Thiourea is treated with alkali and ferric chloride, it gives a blood red coloration, indicating the presence of sulfur in the compound.
Conclusion:
Thiourea is the compound that gives a blood red coloration when its Lassaigne's extract is treated with alkali and ferric chloride. This coloration is due to the formation of a complex between the sulfur atom in Thiourea and ferric chloride.
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Which of the following compounds gives blood red coloration when its Lassaigne's extract is treated with alkali and ferric chloride?a) Thiourea b) Diphenyl sulfide c) Phenyl hydrazine d) Benzamide Correct answer is option 'A'. Can you explain this answer?
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Which of the following compounds gives blood red coloration when its Lassaigne's extract is treated with alkali and ferric chloride?a) Thiourea b) Diphenyl sulfide c) Phenyl hydrazine d) Benzamide Correct answer is option 'A'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following compounds gives blood red coloration when its Lassaigne's extract is treated with alkali and ferric chloride?a) Thiourea b) Diphenyl sulfide c) Phenyl hydrazine d) Benzamide Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following compounds gives blood red coloration when its Lassaigne's extract is treated with alkali and ferric chloride?a) Thiourea b) Diphenyl sulfide c) Phenyl hydrazine d) Benzamide Correct answer is option 'A'. Can you explain this answer?.
Which of the following compounds gives blood red coloration when its Lassaigne's extract is treated with alkali and ferric chloride?a) Thiourea b) Diphenyl sulfide c) Phenyl hydrazine d) Benzamide Correct answer is option 'A'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following compounds gives blood red coloration when its Lassaigne's extract is treated with alkali and ferric chloride?a) Thiourea b) Diphenyl sulfide c) Phenyl hydrazine d) Benzamide Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following compounds gives blood red coloration when its Lassaigne's extract is treated with alkali and ferric chloride?a) Thiourea b) Diphenyl sulfide c) Phenyl hydrazine d) Benzamide Correct answer is option 'A'. Can you explain this answer?.
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