Which of the following reactions is used to prepare aryl fluorides from diazonium salts and fluoroboric acid?

Sandmeyer reaction

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Balz-Schiemann reaction

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Gattermann reaction

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Swarts reaction

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Solution

The correct option is C Balz-Schiemann reaction
Balz-Schiemann reaction is used to prepare aryl fluorides from diazonium salts and fluoroboric acid.
$A r - N_{2} X H B F_{4} - -- \to A r - N_{2} B F_{4}^{-} Δ - \to A r - F + B F_{3} + N_{2} ↑$

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