(a) What is a fuel ? Give five examples of fuels.
(b) What are the characteristics of an ideal fuel (or good fuel) ?
(c ) The calorific value and ignition temperature of fuel A are 55 kJ/g and `80^(@)C`, respectively. These values for fuel B are 80 kJ/g and `10^(@)C`, respectively. On burning, the fuel A produces `CO_(2)` and `H_(2)O` while the fuel B produces `CO_(2), CO` and `SO_(2)`. Give three points of relative advantages and disadvantages of these two fuels.