This explanation is for this equation
oxygen can be removed from metal oxides in chemical reactions. for example:

copper oxide + carbon → copper + carbon dioxide

2cuo(s) + c(s) → 2cu(l) + co2(g)

in this reaction, carbon is oxidised because it gains oxygen. at the same time, copper oxide is reduced because oxygen is removed from it.

so write the explanation for the displacement reaction for zinc+ iron sulphate= zinc sulphate+iron

fr8t7iot7o87oglgt87ot79p0[90

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.