CLASS ASSIGNMENT 6 Alloys Corrosion, Rusting of iron and its prevention1. Name the alloy formed by copper and zinc.2. A utensil made of brass was kept in a kitchen. After some days, the utensils lost its lustre due to the formation of agreenish layer on it. What could be the cause for this?3. Which chemical element is alloyed with copper to make bronze?4. What are the constituents of an alloy called "nickel steel"?5. In the feed and dairy industry, a strong alloy is used for making equipments. The same alloy Is also used in makingutensils. Name the alloy and give its composition.6. An alloy solder is used in the electronic industry to join different electronic components. What are the constituents ofsolder?7. A light and strong alloy is required for making the bodies of aircrafts. What should be its constituents?8. Which two major constituents form the alloy duralumin?9. What is an amalgam? Name two commonly used amalgams.10. Pure gold is a most malleable and ductile metal. Gold used in jewellery is harder. Give reason.11. What is the percentage of pure gold in 22 carats gold?12. What is corrosion? What are the factors that affect the rate of corrosion? How can corrosion be prevented?13. What is galvanisation? Which of the two galvanisation or tinning is advantageousS?14. What happen when iron is kept exposed to humid atmosphere? Explain the process by writing chemical equation515. What is meant by tinning? What is the advantage of tinning.16. Give reason for the following: Blue colour of copper sulphate solution is destroyed when iron filings are added to it.Write the chemical equation for the reaction.17. From the equation for the reaction Fe(s)+ Cus0,(aq)> FeSo,(ag) + Cu(s) predict which of the elements (copper oriron) would occur higher in the reactivity series?18. What is the metal displacement reaction ? Give one example,19. What are the essental conditions for rusting to take place?20. Stainless steel is made from iron by alloying it, Name the alloying metals and their proportion with respect to iron.no spam ​