Question

Which of the following is a solid fuel?

• A. Diesel
• B. Wood
• C. LPG
• D. Petrol

Answer 1

The correct option is B

Wood

Explanation for the correct option:
(B) Wood

• Solid fuel: Fuels that exist in the solid state at room temperature.
• Example: Wood, Coal, etc.
• Wood is commonly used for cooking purposes. It is a cheap and easily available fuel.
• The burning of wood releases large amounts of carbon dioxide and water vapour.

Explanation for the incorrect option:
(A) Diesel

• Diesel exists in the liquid state at room temperature. So it is a liquid fuel.
• Diesel is primarily used in automobiles as fuel.
• The burning of diesel releases heat energy and a large amount of carbon dioxide, smoke, and water vapour, which cause air pollution.

(C) LPG (Liquefied petroleum gas)

• LPG exists in the gaseous state at room temperature. So it is a gaseous fuel.
• LPG is the most widely used fuel at home for cooking. It is usually stored in cylinders in the liquid state under pressure.

(D) Petrol

• Petrol exists in the liquid state at room temperature. So it is a liquid fuel.
• Petrol is primarily used in automobiles as fuel.
• The burning of petrol releases heat energy and a large amount of carbon dioxide, smoke, and water vapour, which cause air pollution.

Hence, option(B) is correct.