Question

Between methane ethane and Acetylene which will have greater calorific value explain very detailed

Answer 1

Almost all the fuels consist of atoms of hydrogen and carbon. Since, the calorific value of fuels depends on the percentage of hydrogen present in them so the fuels which have higher percentage of hydrogen will have higher calorific value as compared to those fuels which have lower percentage of hydrogen.
order will be acetylene > methane > ethane