In this proposal we plan to investigate the anomalous magnetism of Ce in recently discovered CeO0.5F0.5BiS2 and Sr0.5Ce0.5FBiS2 magneto-superconductors. The proposed compounds show superconductivity at below 3.5K and the ordering of Ce moments at below around 8 K. The BiS2 based superconductors, which are similar in structure to the Fe Pnictides are attracting huge attention of the condensed matter physics community. The studies related to the order parameter symmetry at ambient pressure may help in not only understanding the superconducting state but the competing ferromagnetism arising from Ce moments as well. We therefore propose to carry out zero-field muSR study on there two compounds using EMU.