\( 0.05 \, \text{M} \) \( \text{CuSO}_{4} \) when treated with \( 0.01 \, \text{M} \) \( \text{K}_{2}\text{Cr}_{2}\text{O}_{7} \) gives green colour solution of \( \text{Cu}_{2}\text{Cr}_{2}\text{O}_{7} \). The two solutions are separated as shown below
[SPM: Semi Permeable Membrane]

Due to osmosis: