Question

Which among the following is considered as the cleanest fuel?

• A. Cow dung cake
• B. Petrol
• C. Kerosene
• D. Hydrogen gas

Answer 1

The correct option is D

Hydrogen gas

Explanation for correct option

(D) Hydrogen Gas

• Hydrogen gas is considered the cleanest fuel because it produces nothing but water vapor when burned in the air.
• As a result, it is the cleanest, non-polluting fuel available.

Explanation for incorrect options

(A) Cow dung cake

• It requires more oxygen and takes longer to burn
• Hence, cow dung cake is not the cleanest fuel.

(B) Petrol

• Petroleum components are separated by fractional distillation.
• It is burned as fuel, contributing to global warming and acidification of the oceans.

(C) Kerosene

• Kerosene can withstand higher temperatures before vaporizing.
• And also combustion is not easy. Hence, kerosene is not the cleanest fuel.

Therefore, the correct option is (D) Hydrogen gas.