Solution :
Comparing the solubility of silver chromate for the solutions :
----- Less soluble than in pure water.
----- Less soluble than in pure water.
----- Similar solubility as in the pure water
----- Similar solubility as in the pure water
The silver chromate dissociates to form :
When 0.1 M of is added, the equilibrium shifts towards the reverse direction due to the common ion effect of , so the solubility of decreases.
Both and are neutral mediums, so they do not affect the solubility.