Consider the partial equation. Br2 + NaF - - > Which best completes the chemical equation?

no reaction

Na + FBr2

NaBr + F2

Na2F + Br2

I believe the correct answer from the choices listed above is the first option. When Br2 and NaF are mixed, no reaction would occur since Br cannot replace F in NaF. Hope this answers the question. Have a nice day. Feel free to ask more questions.

Answer is (1) - no reaction.

Explanation;

Some of you may think this reaction as a single replacement reaction which gives NaBr + F₂ as products.

But, according to the reactivity of the halogens, reactivity decreases from up to bottom of the group. F is placed above Br. Hence, F is more reactive than Br. Hence, Br can't replace F.