Multiple choice general knowledge science & technology

Which is a chemical change

  1. Chopping onions

  2. Exploding a fire cracker

  3. Melting ice

  4. boiling alcohol
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A firecracker explosion involves combustion reactions that produce new substances (gases, light, heat), making it a chemical change. Chopping, melting, and boiling are physical changes that don't create new chemical substances.

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