Final answer:
When a green solution and a colorless solution are mixed, the resulting color is pale green, thus the initial color after the cell is put in the beaker is most likely to be pale green, aligning with option (a).
Step-by-step explanation:
This question pertains to the immediate visual outcome when two different solutions are mixed in a beaker. Based on the information provided, when a green solution and a colorless solution are mixed, the resulting mixture will have a pale green color. Therefore, the initial color of the solution in the cell immediately after mixing would most likely align with option (a) Blue in the cell; Green in the beaker, as the green would become paler when mixed with a colorless solution. However, it's important to ensure that the solutions mentioned in the question align with the information provided in this scenario.
In a different scenario provided, when two colorless solutions are mixed, and the resulting mixture has a yellow precipitate, it is not directly relevant to the changes in solution color upon mixing but speaks more to the outcome of a chemical reaction where a precipitate is formed.