Question

*aluminium ,chromium manganese are all moderately reactive metals use the following information to arrange them in the correct reactivity series order , starting with the most reactive one.
1)chromium is manufactured by heating chromium (III) oxide with aluminium
2)if manganese is heated with Aluminium oxide there's no reaction
3)if manganese is heated with chromium (III) oxide chromium is produced ​

plzz help !!

Answer 1

The order:

$\mathrm{Al : \: Most \: reactive, reduces \: everyone!(here)}\\\mathrm{Mn}\\\mathrm{Cr}$