Which one of the following elements is not detected by Lassaigne's test?

Sulphur

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Nitrogen

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Oxygen

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Chlorine

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Solution

The correct option is C Oxygen
It is a general test for the detection of halogens, nitrogen and sulphur in an organic compound. These elements are covalently bonded to the organic compounds. In order to detect them, these have to be converted into their ionic forms. This is done by fusing the organic compound with sodium metal.

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Similar questions

Which of the following element is not detected by Lassaigne’s test?

{N H}_{2} - {N H}_{2}

{F e}_{4} {[F e ({C N}_{6})]}_{3}

F e {S o}_{4}, F e {C I}_{3}

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