[" 18.Arrange the following in decreasing order of "],[" reactivity towards "SN^(1)" reaction "]

Arrange the following in decreasing order of SN^2 reaction

Arrange the following metals in the decreasing order of reactivity:

Arrange the following compounds in order of their reactivity toward

Arrange the following in decreasing order of reactivity towards SN^2 reaction (1-Bromopropane,2-Bromo-2-methylpropane ,2-Bromopropane)

Arrange the above in the decreasing order of reactivity towards HBr :

Arrange the following alkenes in decreasing order of their reactivity towards HBr.

Arrange the above in the decreasing order of reactivity towards HBr:

The increasing order of reactivity towards SN^2 reactivity is