B. State whether the following statements are true or false :
1. Gold is a ferromagnetic substance.
2. Chemically magnetite is Fe²o³.

3.Artificial magnets are more powerful than natural magnets.
4. Coins are attracted to a bar magnet as they contain nickel.
5. A U-shaped permanent magnet attracts iron less strongly than a bar magnet.
C. Statements given below are incorrect. Write the correct statements.
1. Aluminium is a magnetic substance.
2. Steel is a non-magnetic substance.
3. Natural magnets are more powerful than artificial magnets​