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Question

Which of the following elements in an organic compound cannot be detected by Lassaigne's test?

A
Nitrogen
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B
Sulphur
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C
Chlorine
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D
Hydrogen
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Solution

The correct option is C Hydrogen

Lassaigne's test is the most reliable test for the detection of nitrogen, halogens and sulphur in an organic compound. The compound is heated with sodium metal to convert the elements present in the organic compound into the water-soluble salts of sodium.


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