Sort the following in the increasing order of calorific value.
A
Wood
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B
Coal
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C
LPG
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D
Hydrogen
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Solution
A fuel with higher calorific value is better than a fuel with a low calorific value.
From real life experience, it is observed that coal is a better fuel than wood. Still, it is not good enough to replace the LPG cylinders used in our kitchens. Hydrogen is so powerful that we are yet unable to safely control and use it for commercial fuel.
Hence, calorific values of fuel follows the following order: Wood > Coal > LPG > Hydrogen