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Question

Which among the following is considered as the cleanest fuel?


A

Cow dung cake

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B

Petrol

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C

Kerosene

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D

Hydrogen gas

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Solution

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.


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