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Aryl fluoride can be obtained directly by heating which arenediazonium salt?

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Aryl fluoride can be obtained directly by heating which arenediazonium salt?

(a) Benzenediazonium fluoride

(b) Benzenediazonium chloride

(c) Benzenediazonium hydrogensulphate

(d) Benzenediazonium fluoroborate

I had been asked this question during an online exam.

The doubt is from Diazonium Salts Chemical Reactions topic in chapter Amines of Chemistry – Class 12

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The correct answer is (d) Benzenediazonium fluoroborate

The explanation is: Arenediazonium fluoroborate is obtained as a precipitate when arenediazonium chloride is treated with HBF4. This salt on heating decomposes to give aryl fluoride.

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