Open star clusters provide an ideal ground for studies of stellar evolution and put constrains on the stellar evolution models. These are very useful test-beds for stellar-evolution theories because all member stars of a cluster were born from the same molecular cloud, therefore approximately have the same distance, age, chemical composition, and reddening. By comparing the colour-magnitude diagram and colour-colour diagram of an open star cluster with the theoretical evolutionary models, one can estimate the values of different physical parameters of the cluster. In my talk, I will present UBVRI photometry of stars present in open cluster Bica 2 which is an intermediate-age open cluster. I will discuss magnitude-error diagram, colour-magnitude diagram, colour-colour diagram, data completeness, radial density profile (RDP), and cluster parameters derived from the RDP for the cluster.