What will replace aluminum in a single replacement reaction

A. Mn

B. Zn

C. K

D. Ag

C. K

Recall the activity series of metals. The order is

K > Al > Mn > Zn

Mn and Zn are below Al in the activity series.

K is the only metal that is above Al.

∴ K will replace Al in a single displacement reaction.

C. K since it is above Aluminium in the reactivity series