Fuel Cells and Hydrogen Energy Questions and Answers

Q: Which has the highest calorific value ?

The highest calorific value is that of hydrogen.Hydrogen releases about 142 MJ per kilogram on combustion (higher heating value), the highest of any fuel by mass.Petrol gives about 45-47 MJ/kg, coal about 15-30 MJ/kg depending on grade, and dry wood about 15-20 MJ/kg. Hydrogen's low density means it has a low energy content per unit volume, but per unit mass it is far ahead.

Q: Hydrogen produced through the electrolysis of water using renewable energy is called :

It is called green hydrogen.Green hydrogen is made by splitting water by electrolysis using electricity from renewable sources such as solar or wind, so its production emits almost no carbon dioxide.Grey hydrogen comes from natural gas by steam methane reforming with the CO2 released, and black (or brown) hydrogen from coal gasification. White hydrogen refers to naturally occurring geological hydrogen.

Which has the highest calorific value ?

A.Coal
B.Petrol
C.Hydrogen
D.Wood

Exam Year(s)

MH SET - 2024, SET Exam - 2024,

Answer: C

The highest calorific value is that of hydrogen.

Hydrogen releases about 142 MJ per kilogram on combustion (higher heating value), the highest of any fuel by mass.

Petrol gives about 45-47 MJ/kg, coal about 15-30 MJ/kg depending on grade, and dry wood about 15-20 MJ/kg. Hydrogen's low density means it has a low energy content per unit volume, but per unit mass it is far ahead.

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Hydrogen produced through the electrolysis of water using renewable energy is called :

A.Grey hydrogen
B.Black hydrogen
C.Green hydrogen
D.White hydrogen

Exam Year(s)

MH SET - 2024, SET Exam - 2024,

Answer: C

It is called green hydrogen.

Green hydrogen is made by splitting water by electrolysis using electricity from renewable sources such as solar or wind, so its production emits almost no carbon dioxide.

Grey hydrogen comes from natural gas by steam methane reforming with the CO₂ released, and black (or brown) hydrogen from coal gasification. White hydrogen refers to naturally occurring geological hydrogen.

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Fuel Cells and Hydrogen Energy Questions and Answers

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