Is this statement correct or not regarding SN1 reaction?

A primary alkyl halide may also undergo SN1 reaction in aqueous formic acid.


This statement is written in one of my organic textbooks. Is it true ?




Quoting ORGANIC CHEMISTRY SECOND EDITION ,Jonathan Clayden ,Nick Greeves , Stuart Warren from page no.338 ,in 50% aqueous ethanol the values give you an idea of the relative reactivity towards substitution of the different classes of compound. These rates are mostly SN1, but there will be some SN2 reactivity with the primary compounds.


[![enter image description here](https://i.stack.imgur.com/Dlqnj.jpg)](https://i.stack.imgur.com/Dlqnj.jpg)


And in page 342 ,the rates of reaction of the following alkyl chlorides with KI in acetone at 50 °C broadly illustrate the patterns of SN2 reactivity are analysed. These are relative rates with respect to n-BuCl as a **‘typical primary halide’.**


[![enter image description here](https://i.stack.imgur.com/C2CNn.jpg)](https://i.stack.imgur.com/C2CNn.jpg)


As you have not mentioned any alkyl halide,n-butyl chloride's relative rate of reaction is 0.07 in 50% aqueous ethanol.Its tendency to undergo SN2 is more then SNI.


Similarly a primary alkyl halide in acetone at 50 °C has greater tendency towards SN2. 


 0