I attached a photo of my work below. Please tell me if I got it wrong; hope you got a good score on your assignment! ^v^
The first step of the oxidation of a primary alcohol involves conversion to an aldehyde via the elimiination of a hydrogen molecule. Thus, ClCH2CH2CH2OH becomes ClCH2CH2COH, which is 3-chloropropanal.
2 NH3+ 2 O2 —> 2 NO+ 3 H2O