Multiple choice Which of the following is not a characteristic of an ideal fuel? It burns easily in air at a moderate rate. It has a low calorific value. It has a proper ignition temperature. It neither produces any harmful gases nor leaves any residue after burning. It is cheap, readily available and easy to transport. Reveal answer Fill a bubble to check yourself B Correct answer Explanation This is the correct option as this is not a characteristic of an ideal fuel. An ideal fuel should have high calorific value so that it can produce a large amount of heat.