Question

I. ANSWER THE FOLLOWING IN A SENTENCE: 5x1=5 1. Define metallurgy. 2. What do you mean by reactivity series of metals? 3. Name a non- metal which is lustrous and a good conductor of heat and electricity. 4. Write down the chemical equation for the reaction of copper with oxygen. 5. Mention two uses of phosphorus. II. ANSWER THE FOLLOWING IN SHORT: 3x2=6 6. Differentiate between malleability and ductility. 7. Corrosion is troublesome but sometimes useful. Justify with a chemical equation. 8. A. What is an alloy? (1m) B. Give the name and composition of the alloy that is used to make statues. (1m) III. ANSWER THE FOLLOWING BRIEFLY: 3x3=9 9. A. State whether a displacement reaction will occur if iron sulphate is mixed with zinc. Give reasons and write down the reaction. (1m) B. What is the advantage of galvanized iron over tin-plated iron? (2m) 10. How is anodizing of aluminium carried out? 11. A. Different metals have different reactivities with water. Discuss with two examples. (2m) B. Why aren’t pickles stored in metallic containers? (1m) IV. ANSWER THE FOLLOWING IN DETAIL: 1x5=5 12. A) Define corrosion. (1m) B) Describe an experiment to show the conditions necessary for rusting of iron with a diagram. (4m)

Answer 1

Answer:

2. The reactivity series is a series of metals, in order of reactivity from highest to lowest. It is used to determine the products of single displacement reactions, whereby metal A will replace another metal B in a solution if A is higher in the series.

1. Metallurgy is the branch of science and technology concerned with the properties of metals and their production and purification.