which types of metal can be obtained i ntheir pure form by just hetaing their oxides in air. Give one example

When discussing the recovery of metals from their oxides through heating in air, it is essential to recognize that this process applies primarily to metals that can be reduced without the need for a reducing agent. Typically, metals with lower reactivity, such as lead, copper, and silver, can be obtained in their pure form through this method.

1. Types of Metals:

   • Lead (Pb)
   • Copper (Cu)
   • Silver (Ag)

2. Example: An example of a metal that can be obtained in its pure form by simply heating its oxide in air is Copper.

   The chemical reaction can be represented as: $2 \text{CuO} + \text{heat} \rightarrow 2 \text{Cu} + \text{O}_2$

In this reaction, copper(II) oxide (CuO) is heated in the presence of air (or more specifically, oxygen), which results in the reduction of the oxide to metallic copper and the release of oxygen gas. This method is particularly effective for metals that do not readily oxidize further and can be executed efficiently in a furnace.