1.

Which of the following statements regarding fuel cells is false?(a) Because of continuous supply, fuel cells never become dead(b) They do not cause pollution(c) Fuel cells have 100% efficiency practically(d) The cost of catalysts needed for the electrode reactions is highI have been asked this question in a job interview.The question is from Electrochemistry topic in chapter Electrochemistry of Chemistry – Class 12

Answer»

Right option is (c) Fuel cells have 100% EFFICIENCY practically

To explain: THEORETICALLY, the fuel cells are expected to have an efficiency of 100%. However, practically they give efficiency of 60-70%. Still, they are much superior to the thermal power plants in which FUELS are burnt to PRODUCE heat which then changes WATER into steam to run the turbine. Such a power plant does not have an efficiency of more than 40%.



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