A substance is added to the solution of Barium sulphate,yellow precipitate is formed.What is that substance?

To determine the substance that was added to the solution of Barium sulfate, we can refer to the solubility rules and the color of the precipitate.

Barium sulfate is an insoluble compound, meaning it does not dissolve in water. When a substance is added to the solution of Barium sulfate and a yellow precipitate is formed, it indicates the presence of a substance that can react with the Barium ions (Ba2+) and form an insoluble yellow compound.

Based on the observation that the precipitate is yellow, we can conclude that the substance added is likely "Sodium chromate" (Na2CrO4). Sodium chromate reacts with Barium ions to form Barium chromate (BaCrO4), which is yellow and insoluble in water.

To further confirm this, you can perform a confirmatory test by adding a few drops of dilute Hydrochloric acid (HCl) to the yellow precipitate. If it dissolves, then it is Barium chromate, confirming the presence of Barium ions.

It is important to note that this explanation is based on the given information and assumptions. Confirmatory tests and further analysis should be conducted in a laboratory setting for accurate identification.