Diamond and graphite burn, to give out:

Options

A. Carbon monoxide
B. Carbon dioxide
C. Carbon
D. Oxygen

Answer

To solve the question "Diamond and graphite burn to give out:", we need to understand the properties of diamond and graphite, and what happens when they are burned.

### Step-by-Step Solution:

1. **Identify the substances**:
- Diamond and graphite are both forms of carbon. They are known as allotropes of carbon.

**Hint**: Remember that allotropes are different structural forms of the same element.

2. **Understand the burning process**:
- When substances burn, they typically react with oxygen in the air. This reaction is called combustion.

**Hint**: Combustion usually involves a fuel (in this case, carbon) and an oxidizer (oxygen).

3. **Determine the products of combustion**:
- When carbon (in the form of diamond or graphite) burns in the presence of sufficient oxygen, it primarily produces carbon dioxide (CO₂). In limited oxygen, it can produce carbon monoxide (CO), but the question implies complete combustion.

**Hint**: Think about the common products of burning carbon-based materials.

4. **Conclude the answer**:
- Since both diamond and graphite are forms of carbon, when they burn, they will produce carbon dioxide (CO₂) as the main product.

**Hint**: Focus on the most common product of carbon combustion in the presence of oxygen.

### Final Answer:
Diamond and graphite burn to give out carbon dioxide (CO₂).