Which of the following properties of pure metal makes it more useful than the corresponding alloy

Options

A. It is harder than corresponding alloy
B. It has high density
C. It can be extracted easily
D. It conducts heat and electricity easily

Explanation

To determine which property of pure metal makes it more useful than the corresponding alloy, let's analyze the options provided.

### Step 1: Evaluate the properties of pure metals and alloys
- **Hardness**: Pure metals are generally softer than their alloys. Alloys are often designed to enhance hardness and strength. Therefore, this property does not make pure metals more useful.

- **Density**: The density of pure metals can vary, but alloys can be engineered to have specific densities for particular applications. This property does not favor pure metals.

- **Ease of extraction**: The extraction process for metals can be complex and varies depending on the metal and its ore. This property does not necessarily make pure metals more useful than alloys.

### Step 2: Identify the key property
- **Conductivity**: Pure metals are typically better conductors of heat and electricity compared to their alloys. This is due to the uniform structure of pure metals, which allows electrons to flow more freely. Alloys, being mixtures of different metals, can disrupt this flow and reduce conductivity.

### Conclusion
The property that makes pure metals more useful than corresponding alloys is their ability to conduct heat and electricity efficiently. Therefore, the correct answer is:

**Pure metals conduct heat and electricity better than corresponding alloys.**