  Taking into account the recently developed van der Waals (VDW) like equation
of state (EoS) for grand canonical ensemble of fermions, the temperature
dependent profiles of normalized entropy density ($s /T^3$) and the ratio of
shear viscosity and entropy density ($\eta/ s$) for hadron resonance gas have
been evaluated. The VDW parameters, corresponding to interactions between
(anti)baryons, have been obtained by contrasting lattice EoS for QCD matter at
finite chemical potentials ($\mu_{B}$) and for $T \le$ 160 MeV. The temperature
and chemical potential dependent study of $s /T^3$ and $\eta /s$ for hadron
gas, by signalling onsets of first order phase transition and crossover in the
hadronic phase of QCD matter, helps in understanding the QCD phase diagram in
the ($T, \mu_{B}$) - plane. An estimation of probable location of critical
point matches predictions from other recent studies.
