what type of reaction is Nickel (II) ion and iron (III) ion and reacts to produce iron (II) and nickel (III) ions?

is it: combination, decomposition, single or double replacement.

The way you have it written it is an oxidation-reduction reaction.

displaceplacement

The reaction between nickel (II) ion and iron (III) ion is a double displacement or double replacement reaction. In this type of reaction, the positive ions of two different compounds switch places to form new compounds. In the given reaction, the nickel (II) ion (Ni2+) and iron (III) ion (Fe3+) combine to form iron (II) ion (Fe2+) and nickel (III) ion (Ni3+). Therefore, the type of reaction is double replacement.

To determine the type of reaction between nickel (II) ion and iron (III) ion, we need to analyze the resulting products. In this case, the reaction is:

Nickel (II) ion + iron (III) ion → iron (II) ion + nickel (III) ion

The reaction involves an exchange of ions between the reactants. This indicates that it is a double replacement reaction, also known as a double displacement reaction or metathesis reaction. In a double replacement reaction, the cations (positive ions) and anions (negative ions) exchange places to form new compounds.

In this specific reaction, the nickel (II) ion and iron (III) ion are exchanging places with each other, resulting in the formation of iron (II) ion and nickel (III) ion.

Therefore, the correct answer is double replacement.