1.

Fuel cells produce electricity with an efficiency of about "_______" compared to thermal plants whose efficiency is about 40%.

Answer»

`80%`
`90%`
`70%`
`100%`

Solution :The efficiency of ENERGY conversion of the fuel cell operation is `60 - 70^` of the theoretical maximum (based on `DeltaG`). This represents about twice the efficiency that cen be REALIZED from burning hydrogen in a heat engine coupled to a generator.
There has been tremendous program in the development of new electrode materials, better catalystes for INCREASING the efficiency of fuel cells.
Theses have been useed in automobiles on an experimental basis. Fuel cells are pollution free and in view of their future importance, a variety of fuel cells have been FABRICATED and tried.


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