${\text{CrO}}_{\text{2}}{\text{Cl}}_{\text{2}}$  is mild oxidising agent.

In this compound $\mathrm{Cr}$ is surrounded by less electrongative $\text{Cl}$ atom rather than oxygen so it does not produce so much positve charge on chromium in comparision to other compound containing highly electronegative $\text{O}$ atom. So, due to relativily low value of Standard Reduction potential it act as mild oxidising agent.

${\text{KMnO}}_{\text{4}}{\text{,HNO}}_{\text{3}}$ and ${\text{K}}_{\text{2}}{\text{Cr}}_{\text{2}}{\text{O}}_{\text{7}}$  are strong oxidising agent due to high  Standard Reduction potential.