For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3), while the C.V. is same on weight basis (i.e., kcal/kg) ?
Correct answer: A
Explanation
Propane and acetylene have a volume ratio of C.V. that is about 2:1, but their weight-based C.V. values are similar.