The calorific values of wood, diesel, natural gas and charcoal vary in the order –
A
Wood > Diesel > Natural gas > Charcoal
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B
Wood > Diesel > Charcoal > Natural gas
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C
Natural gas >Diesel > Charcoal> Wood
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D
Natural gas >Diesel> Wood > Charcoal
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Solution
The correct option is C Natural gas >Diesel > Charcoal> Wood Natural gas >Diesel > Charcoal> Wood The calorific value of a fuel depends upon the nature of the fuel and the relative proportions of the elements present. It increases with increasing amounts of hydrogen and decreases with the moisture content present in the fuel.