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  4. Replacement of diazonium group by fluorine is known as

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Q. Replacement of diazonium group by fluorine is known as

MHT CETMHT CET 2015

Solution:

When diazonium salt is treated with fluoroboric acid $\left( HBF _{4}\right)$, benzene diazonium fluoroborate is precipitated, which on heating gives fluorobenzene. This reaction is called Balz Schiemann reaction.

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