Final answer:
Acid-based cleaning agents are effective for cleaning tile, grouting, and metal surfaces. They contain strong mineral acids and chelants that can dissolve various substances such as greases and proteins.
Step-by-step explanation:
Acid-based cleaning agents are aggressive cleaners which can be applied to tile, grouting, and metal surfaces. These cleaning agents contain strong mineral acids and chelants, such as hydrochloric acid and sulphuric acid, which are effective in dissolving greases, proteins, and even carbohydrate-containing substances. However, it is important to dilute these acids before use to ensure safety.