Alloying is a very good method of improving the properties of a metal. iron is the most widely used metal. But it is never used in its pure state. This is because pure iron is very soft and stretches easily when hot. But, if it is mixed with a small amount of carbon (about 0.05 %) ,it becomes hard and strong. When iron is mixed with nickel and chromium, we get stainless steel, which is hard and does not rust. Thus, if iron is mixed with some other substance, its properties change.1. Iron if mixed with other metals can change its properties?a. YESb. NO2. What happens to iron when mixed with carbon?a. It becomes Soft and weakb. It becomes Hard and strong3. Which of the following is an alloy?a. Mixture of nickel and chromium with ironb. Mixture of sodium and carbon with steel4. Which metal is never used in pure state?a. Ironb. Alloy5. State True or False. Iron can rust.a. TRUEb. FALSE