Multiple choice

Chemical reactions are very important. Which of the following is not done with the help of a chemical reaction?

  1. Extraction of metals from their ores

  2. Magnetisation of an iron bar

  3. Production of new medicines

  4. Preparation of plastics

  5. Preparation of building materials

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option as magnetisation of an iron bar is not done with the help of a chemical reaction.