  Detailed characterization of the newly available plastic scintillator
(EJ-299-33A) having the pulse shape discrimination (PSD) property has been
carried out in case of a large-sized detector (5 in.$\times$5 in.). The pulse
height response of the scintillator for nearly mono-energetic neutrons has been
reported in case of neutron energies E$_n$ =3, 6 and 9 MeV. Important
properties (figure-of-merit (FOM), time resolution, detection efficiency) of
the detector has been compared with a commonly used liquid organic scintillator
based detector of the same size coupled to the same PMT for uniformity in
comparison. The results show that the plastic scintillator detector has about
12$\%$ better time resolution. However, the FOM and detection efficiency were
found to be lower than that of the liquid scintillator detector by 40 - 50$\%$
and $\sim $25$\%$, respectively. The possibility of using the new plastic
scintillator in large-scale nuclear physics experiments has been pointed out.
