Which of the following is the correct method of preparation of methyl fluoride?

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${CH}_{4} + HF$ $\to$

${CH}_{3} OH + HF \to$

${CH}_{4} + F_{2} ⟶$

${CH}_{3} Br + AgF \to$

answer is D.

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Detailed Solution

It is difficult to prepare fluoroalkanes directly. The synthesis of alkyl fluorides is best accomplished by heating an alkyl chloride/bromide in the presence of a metallic fluoride such as AgF, Hg₂F₂ , CoF₂ or SbF₃. The reaction is termed as Swarts reaction

${CH}_{3} Br + AgF \overset{∆}{\to} {CH}_{3} F + AgBr$

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