Solution:
concept - Calorific value refers to the amount of heat produced by a unit volume of a substance through complete combustionThe Calorific value of the fuels mentioned in the question are:
Petrol: 48,000 KJ/mol
Coke: 31,000 KJ/mol
Natural gas: 43,000 KJ/mol
Kerosene: 46,200 KJ/mol,
Therefore, petrol has the highest calorific value. It means on burning 1 L of petrol, more heat is produced when compared to burning 1 L of coke or natural gas or kerosene. Petrol, diesel, kerosene, and LPG are petrochemicals.
petrochemicals are the compounds that are obtained by processing petroleum and natural gas.
Petrochemicals are completely different compounds from petroleum as they are obtained after performing some reaction with petroleum.
Hence, the correct answer is 1.
