Metals：練習題

Which of the following is a characteristic physical property of all metals?

In the extraction of iron, iron(III) oxide is reduced in the blast furnace. Which chemical equation correctly represents this reduction process?

In a blast furnace, carbon monoxide acts as the reducing agent to extract iron from hematite. How is this carbon monoxide produced within the furnace?

The diagram shows the arrangement of atoms in an alloy compared to a pure metal.

Why is the alloy usually harder and stronger than the pure metal?

Three metals, \(P\), \(Q\), and \(R\), are extracted from their ores using the methods shown below:
- Metal \(P\): found as a native element (uncombined).
- Metal \(Q\): extracted by heating its oxide with carbon.
- Metal \(R\): extracted by the electrolysis of its molten ore.

What is the correct order of reactivity of these metals, starting with the most reactive?

State what is meant by the term malleability when describing a physical property of metals.

Iron is an important metal extracted from its ore in a blast furnace, but it is highly susceptible to rusting.
(a) State the two essential substances that must be present for iron to rust.
(b) Explain how the use of painting acts as a barrier method to prevent rusting.
(c) Identify the main ore of iron and name the gas that reduces the iron(III) oxide within the blast furnace.