  A new ternary intermetallic compound $\mathrm{Pr_2Rh_2Ga}$ was synthesized by
arc-melting and was characterized by powder X-ray diffraction (PXRD),
magnetization, heat capacity $\mathrm{C}_p(\textit{T})$, and electrical
resistivity $\rho(T)$ measurements. PXRD patterns revealed that
$\mathrm{Pr_2Rh_2Ga}$ crystallizes in the $\rm{La_2Ni_3}$-type of orthorhombic
structure with the space group $Cmca$. The temperature variation of magnetic
susceptibility, $\mathrm {C}_p(\textit{T})$ and $\rho(T)$ confirmed that
$\mathrm{Pr_2Rh_2Ga}$ exhibits a ferromagnetic behavior with the transition
temperature of 18 K. The estimated Sommerfeld coefficient $\gamma$ = 640
mJ/($\mathrm{Pr.mole.K^2}$) from the $\mathrm {C}_p(\textit{T})$ results in the
paramagnetic region just above $T_{C}$~was large in comparison to ordinary
metals. In the paramagnetic region $\rho(T)$ data showed a metallic behavior
characteristic of electron - phonon scattering. The maximum negative
magneto-resistance at high field occurs in the region near the magnetic phase
transition temperature. The maximum value of magnetic entropy change ($\rm
-\Delta \textit{S}_{M}$) and adiabatic temperature change ($\rm \Delta
\textit{T}_{ad}$) are $\rm8.2~J/kg.K$ and $\rm3.6~K$, respectively, around the
transition temperature for the change of magnetic field 0-9 T. The calculated
refrigerant capacity is $\rm70~J/kg$, and $\rm135~J/kg$ for a change of
magnetic field 0-5 T and 0-9 T, respectively. Arrott plot derived from
isothermal magnetization and the universal scaling plot by normalizing $\rm
-\Delta \textit{S}_{M}$ confirm that the compound undergoes a second order
ferromagnetic to paramagnetic phase transition.
