Question

1. 2. EXERCISES Use Cordova Smart Class Software on the smart board in class to do these exercises. A. Tick() the correct options: In which of the following processes, a new substance is formed? (a) melting (b) sublimation (c) evaporation ( (d) rusting In galvanisation, iron objects are coated with metal. (a) aluminium (b) zinc (c) copper (d) silver 3. Temporary and reversible changes are generally changes. (a) physical (b) irreversible (c) chemical (d)mechanical O Which of the following is not a chemical change? (a) formation of curd (b) spoilage of food (c) hammering of metal (d) digestion of food 5. Magnesium ribbon burns with light to form a white powder. (a) white (b)red (c) blue (d) green 6. Which of the following substances will be formed when magnesium ribbon burns in air? (a) magnesium carbonate (b)magnesium bicarbonate (c) magnesium hydroxide (d)magnesium oxide B. Fill in the blanks: 4.​

Answer 1

Answer:

Rusting, Fe2O3.H2O

Explanation:

rusting of iron made new substance called rust