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

van der Waals hadron resonance gas and QCD phase diagram