Final answer:
The correct answer is b) Ba(OH)₂. Ba(OH)₂ is a strong base because it dissociates completely into ions when dissolved in water.
Step-by-step explanation:
The correct answer is b) Ba(OH)₂. Ba(OH)₂ is a strong base because it dissociates completely into ions when dissolved in water.
This means that it releases hydroxide ions (OH-) into the solution, resulting in a high concentration of hydroxide ions. In contrast, the other compounds listed are weak bases because they only partially dissociate into ions when dissolved in water.