Among the following changes in the states or appearance of iron, which one is a chemical change?

Options :
  1. Rusting of iron
  2. Tempering of iron
  3. Melting of iron
  4. Bending of iron
Answer and Explanation :-

Answer: Option 1

Explanation:

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I suppose we'll never know what really happened in that room, though he did tell police, "I did it because I'm a dirty dog." This is not a very convincing alibi. He may as well have said, "I got 99 problems, but a bitch ain't one.
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