___ NaF + ___Br2 ___NaBr + ___ F2
right answers only

1. A (2,1,2,1)

2. C (single displacement reaction)

Explanation:

1) In this question, the given reaction is as follows:

_ NaF + _Br2 ➡ _NaBr + _ F2

In order to balance this chemical reaction between sodium fluoride (NaF) and bromine gas (Br2) to give Sodium bromide (NaBr) and fluorine gas (F2), we need to make use of COEFFICIENTS.

The same number of atoms of each element must be present on the reactants side and the products side.

- There are two atoms of fluorine on the product side, hence, we place coefficient 2 behind NaF

- There are two atoms of bromine on the reactant side, hence, we place coefficient 2 behind NaBr

After this, we get the order of coefficients as 2,1,2,1

2) A single displacement reaction is a type of reaction in which only ONE element is substituted by another element in a compound. In this reaction, 2NaF + Br2 ➡ 2NaBr + F2, fluorine is displaced by bromine in the compound NaF or in other words, bromine substitutes fluorine in the compound, hence, it is a SINGLE DISPLACEMENT REACTION.