1. The process of coating _________ metal on iron objects is called chrome-plating.

2. Metals have high density.

3. Pick the odd one out - a) oil b) grease c) paint d) water

4. Give reason-Containers of galvanised steel are not used for keeping food.

5. Rust turns red litmus blue.

6. Doors and windows made of iron are first painted with _______ and then with oil paint.

7. __________ has low density.

8. Only moisture is necessary for rusting.

9. Rust is _________ in nature.

10. ________ is a ductile non-metal.