Answer:
D) . OH−
Step-by-step explanation:
Ionic compounds that dissolve in water to generate a homogenous solution are frequently formed by ions with oppositely charged charges. The forces of attraction between ions with the same charges, on the other hand, are frequently too powerful to be overcome by the forces of attraction between the ions and the water molecules, resulting in the formation of insoluble compounds. Therefore, an anion with a negative charge, such as NO3- or OH-, is the ion that is typically present in an insoluble ionic combination. Only d. OH- is an anion with a negative charge, hence it is the only one of the choices that is the right response.