Scientist of UK have invented the cars working on hydrogen fuel cells instead of petrol engines. Here hydrogen is used as a sources of electrical energy i.e., a reaction of hydrogen and oxygen if used to generate electrical energy. It has many advantages over the conventional fossil fuels and electric power generation.
(i) Give two advantages of hydrogen over fossil fuels?
(ii) What is the efficiency of fuel cell as comparison to other conventional fuels?
(iii) What are the values possessed by scientists of UK?