  Ambiguities regarding the physics and the existence of the critical point
(CP) on the QCD phase boundary still exist and the mist regarding the
conjectured QCD phase boundary has not yet cleared. In this paper we extend our
earlier study where we constructed a deconfining phase boundary using Gibbs'
equilibrium conditions after using a quasiparticle equation of state (EOS) for
quark gluon plasma (QGP) and an excluded volume EOS for the hadron gas (HG) and
find the presence of a critical point on this phase boundary where the first
order phase transition terminates. In this paper, we plot the difference in the
normalized entropy density ($s/T^{3}$) between HG and QGP phases along the
deconfining phase boundary and find that it vanishes at CP. Further we have
shown the variation of the square of speed of sound ($c_{s}^{2}$) for the HG
and QGP separately and find that the difference ($\Delta c_{s}^{2}$) between
them along the deconfining phase boundary again vanishes at the CP of the
boundary. We also plot the variation of shear viscosity to entropy density
ratio ($\eta/s$) in HG as well as in QGP phases separately with respect to
temperature at different baryonic chemical potential ($\mu_{B}$). The presence
of a cusp like structure in $\eta/s$ again confirms the existence of CP on the
deconfining phase boundary as predicted by some authors. These studies thus
firmly indicate the precise location of CP as a second order phase transition
point.
