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Which of the following statements is true for acids?

  1. They have a bitter taste

  2. They feel slippery

  3. They react strongly with metals

  4. They have a high pH value

The correct answer is: They react strongly with metals

The true statement regarding acids is that they react strongly with metals. This characteristic is a defining property of many acids, particularly strong acids like hydrochloric acid or sulfuric acid. When acids come into contact with certain metals, a chemical reaction occurs that often produces hydrogen gas and a salt. This reaction is why acids can be both corrosive and reactive with various metal materials. The other properties listed do not accurately apply to acids. For instance, acids typically have a sour taste, not a bitter one, and they do not feel slippery; those characteristics are usually associated with bases. Additionally, acids generally have a low pH value, typically ranging from 0 to 7, in contrast to the high pH values associated with bases.