1. The chemical reaction that produces heat and light is called
2. The following are chemical changes except
3. Which of the following describes the process of depositing a zinc layer on iron
4. Which of the following is not essential for rusting to take place
5. Heavy chemicals can be harmful to humans except if it is in
6. One of the following is used in making car battery
7. One of the following is a non-hazardous chemical
8. The following are characteristics of physical change except?
9. One of the following is not the factor that determines the location of an industry
10. The following are forms of gases used as fuel except
