WBCS.LIVE practice question

Which of the following is an example of a 'Chemical Change'?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Melting of Ice
  2. Dissolving sugar in water
  3. Rusting of Iron
  4. Boiling of Water

Correct answer and explanation

Correct answer: Rusting of Iron

Explanation: āœ… Correct Answer: (C) Rusting of Iron šŸ“š Explanation: A chemical change occurs when a substance combines with another to form a new substance. Rusting of iron (oxidation) is a chemical change because iron reacts with oxygen and moisture to form iron oxide, a completely new chemical compound. Physical changes, like melting or boiling, only change the state or appearance of the substance without changing its chemical composition. Rusting is usually irreversible, which is a common characteristic of chemical changes.