Which one among the following is considered as the cleanest fuel?
  1. Cowdung cake
  2. Petrol
  3. Kerosene
  4. Hydrogen gas

AcademicChemistryNCERTClass 8

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.
Updated on 10-Oct-2022 13:25:41