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🧪 Lab 10 of 15 · Science Lab - Basic 2 · Class 6–7

Experiment 9 — Stop the Rust

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Topic: Chemistry · Classes 6–7 · Rusting: conditions and prevention

Aim: Keep the iron nail rust-free for 7 days .

Daily: India loses vast sums to rust every year — bridges, railway tracks, gates and cycles. Painting a gate, oiling a cycle chain and galvanising a bucket are all this experiment, applied.

Question: An iron nail is kept in boiled water sealed under a layer of oil. After a week it will be…

Exp: Boiling drives out dissolved air and the oil keeps more out. No oxygen means no rust.

Exp: Remove either one and rusting stops.

Question: Salt water makes rusting…

Exp: Which is why seaside metal corrodes quickly.

Question: Galvanising means coating iron with…

Exp: Zinc protects the iron beneath.

Question: Rusting is a chemical change because…

Exp: Hydrated iron oxide is a new substance.

All activities in Science Lab - Basic 2

  1. Part 3 — Biology
  2. Experiment 1 — Measure an Odd-Shaped Stone
  3. Experiment 2 — How Fast Is the Trolley?
  4. Experiment 3 — The One-Second Pendulum
  5. Experiment 4 — Hit the Target with Light
  6. Experiment 5 — Which Spoon Gets Hot First?
  7. Experiment 6 — Build an Electromagnet
  8. Experiment 7 — Acid, Base or Neutral?
  9. Experiment 8 — Physical or Chemical Change?
  10. Experiment 9 — Stop the Rust
  11. Experiment 10 — Choose the Right Technique
  12. Experiment 11 — Does a Leaf Need Light to Make Food?
  13. Experiment 12 — What Is in the Air You Breathe Out?
  14. Experiment 13 — Digestion Begins in Your Mouth
  15. Experiment 14 — Design an Animal That Survives

Practise for Class 6–7