In _____ combustion, a combustible substance is burnt in sufficient supply of air, carbon dioxide and water are formed. Some energy is also evolved in this process.

Options

A. Incomplete
B. Complete
C. Rapid
D. Spontaneous

Answer

**Step-by-Step Text Solution:**

1. **Understanding Combustion**: Combustion is a chemical process where a substance reacts with oxygen to produce heat and light. It can occur in different forms depending on the availability of oxygen.

2. **Types of Combustion**: There are various types of combustion, including complete combustion, incomplete combustion, rapid combustion, and spontaneous combustion.

3. **Complete Combustion**: In complete combustion, a combustible substance burns in a sufficient supply of oxygen (or air). This process produces carbon dioxide (CO2) and water (H2O) as the main products.

4. **Energy Release**: During complete combustion, energy is released in the form of heat. This is an exothermic reaction, meaning it gives off energy.

5. **Filling in the Blank**: The question asks for the type of combustion where a combustible substance is burnt in sufficient supply of air, resulting in the formation of carbon dioxide and water, along with the release of energy. The correct term to fill in the blank is "complete".

6. **Final Answer**: In **complete** combustion, a combustible substance is burnt in sufficient supply of air, carbon dioxide and water are formed, and some energy is also evolved in this process.

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