Which of the following statements is incorrect about lassaigne's test?

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N, S and halogens (Except $F_{2}$ ) are detected by the test.

Covalent organic compounds are converted into ionic compounds in this test.

If sodium fusion is carried out with excess of sodium both nitrogen and sulphur are present in the lassaigne's extract, and it gives blood red colour

If nitrogen and sulphur are present along with halogen the extract should first boil with $H N O_{3}$ for detection of halogen

answer is C.

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Detailed Solution

With excess of $N a,$ nitrogen and sulphur give their usual tests

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