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Q.

Which of the following fuels has the highest calorific value?


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a

Hydrogen gas

b

Methane

c

Petrol

d

Biogas  

answer is A.

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Detailed Solution

Hydrogen gas has the highest calorific value.
The calorific value of food or fuel is the amount of heat energy present that is determined by the complete combustion of a specified quantity at constant pressure and under normal conditions. The amount of heat energy produced by a fuel after complete combustion is referred to as its calorific value." Hydrogen has the highest calorific value, which is 150000 kJ/kg.
On the other hand, the calorific value of petrol is 45000 kJ/kg and that of biogas is 50000 kJ/kg.
 
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