How does benzene diazonium chloride react with HBF_(4) ?

1.	How does benzene diazonium chloride react with HBF_(4) ?
Answer» Solution :Fluoro benzene is prepared by treating benzene DIAZONIUM chloride with fluoro boric acid. This REACTION PRODUCES diazonium fluoroborate which on heating produces fluorobenzene. This reaction is CALLED Balz-Schiemann reaction. `underset("Benzene diazonium chloride")(C_(6)H_(5)N_(2)Cl+HBF_(4)) underset(-HCl) to C_(6)H_(5)BF^(-) underset(heat)to underset("Fluorobenzene")(C_(6)H_(5)F+BF_(3)+N_(2))`.

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