Which form of energy is relesed from fuel ?

Options

A. Sound
B. Heat
C. Light
D. (b) and (c )

Explanation

To answer the question "Which form of energy is released from fuel?" we can follow these steps:

### Step 1: Understanding Fuels
Fuels are substances that can be burned to produce energy. Common examples include petrol, LPG (liquefied petroleum gas), and coal.

### Step 2: The Process of Combustion
When fuels are burned, a chemical reaction called combustion occurs. This process involves the fuel reacting with oxygen to produce new substances.

### Step 3: Products of Combustion
During combustion, the main products are usually gases such as carbon dioxide (CO2) and water vapor (H2O). However, if the combustion is incomplete, other by-products like carbon monoxide (CO) or soot may also be produced.

### Step 4: Energy Released
The combustion of fuels releases energy in the form of heat and light. This is the primary form of energy we obtain from burning fuels. For example:
- When petrol is burned, it produces heat that can be used to power engines and light from the flames.
- Burning LPG also releases heat and light.
- Coal combustion similarly generates both heat and light.

### Step 5: Conclusion
Thus, the correct answer to the question is that the energy released from fuel is in the form of both heat and light.

### Final Answer
The form of energy released from fuel is **both heat and light**.

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