Which one among the following is considered as the cleanest fuel?

1. Cowdung cake
2. Petrol
3. Kerosene
4. Hydrogen gas

Correct Answer: (d) Hydrogen gas
Explanation:  Hydrogen gas is considered as cleanest fuel. Unlike carbon-based fuels, hydrogen produces no harmful by-products on combustion. Only energy and clean water are produced.

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Updated on: 31-Jan-2023

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