Final answer:
Acids have several properties, including the ability to dissolve active metals, change the color of acid-base indicators, and have a sour taste.
Step-by-step explanation:
Acids have several properties that distinguish them. One property is that acids can dissolve active metals like zinc and iron, producing hydrogen gas. For example, hydrochloric acid reacts with zinc to produce zinc chloride and hydrogen gas.
Another property is the ability of acids to change the color of certain acid-base indicators. Acidic solutions turn blue litmus paper red. Finally, acids have a sour taste. Lemons, vinegar, and sour candies all have a sour taste due to the presence of acids.