Lassaigne's test is used for the detection of:

Carbon only

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Hydrogen only

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Oxygen only

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Nitrogen, sulphur, phosphorus and halogens

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Solution

The correct option is D Nitrogen, sulphur, phosphorus and halogens
Lassaigne's test is a general test for the detection of nitrogen, sulphur, phosphorus and halogens present in an organic compound. This method is done by fusing the organic compound with sodium metal. The ionic compound formed during the fusion are extracted in aqueous solution and can be used for detection of nitrogen, sulphur, phosphorus and halogens by simple chemical tests.

Hence, the correct answer is option (d).

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Similar questions

Assertion (A): Much of the nitrogen and small amounts of phosphorus and sulphur are carried in the organic form through xylem.

Reason (R): Xylem transports only inorganic nutrients and phloem transports only organic nutrients.

Air is a mixture of only three gasses nitrogen, oxygen and carbon dioxide.

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