explain the identification process for a single replacement reaction and the factors that need to be considered

Answer 1

The identification process (if I know what that means) would be a single element reacting with a compound, with a generic form of

A + BC ==> AC + B where A replaces B and liberates free B.

The main factor to be considered is whether or not A is more active than B. If yes, then the reaction can proceed. If not, then there will be no reaction.