Physical and Chemical Changes — Advanced

Grade 8 Science — Physical and Chemical Changes — Advanced: 25 practice questions with instant scoring and explanations.

1. A physical change is characterized by:
2. A chemical change is characterized by:
3. Rusting of iron is a:
4. Rusting of iron occurs due to:
5. The chemical formula for rust is:
6. Galvanisation is a process that:
7. Electroplating is a technique used to:
8. In electroplating, the object to be plated is connected to the:
9. Crystallisation is a process where:
10. An endothermic reaction:
11. An exothermic reaction:
12. Burning of coal is an:
13. Melting of ice is a:
14. Evaporation of water is an:
15. Dissolution of sugar in water is a:
16. When iron filings react with sulphur on heating, a new substance is formed. This is a:
17. Burning of magnesium in oxygen produces:
18. Neutralisation reactions are:
19. An example of a reversible physical change is:
20. Most irreversible changes are:
21. Corrosion is similar to rusting but occurs in:
22. The colour change in a chemical reaction indicates:
23. Condensation of water vapour on a cold surface is a:
24. When ice melts to water and then water evaporates to steam, these are:
25. The main disadvantage of rusting is that it: