The diagram that represents single replacement reaction is:
b.
Single replacement reaction:
This reaction is also known as displacement reaction. It is a reaction in which one element is substituted for another element in a compound. When a replacement reaction occurs, a new aqueous compound and a different pure element will be generated as products. For example:
[tex]2HCl(aq)+Zn(s)--->ZnCl_2(aq)+H_2(g)[/tex]
Thus, option b is correct.
Find more information about displacement reaction here:
brainly.com/question/20690229
