Lakhmir Singh and Manjit Kaur Solutions for Chapter: Sources of Energy, Exercise 3: Long Answer Type Questions

What is a fuel? Give five examples of fuels.

What are the characteristics of an ideal fuel (or good fuel)?

The calorific value and ignition temperature of fuel A are $55 \mathrm{k}\mathrm{J} {\mathrm{g}}^{-1}$ and $80 \mathrm{℃}$, respectively. These values for fuel B are $80 \mathrm{k}\mathrm{J} {\mathrm{g}}^{-1}$ and $10 \mathrm{℃}$, respectively. On burning, the fuel A produces $\mathrm{C}{\mathrm{O}}_2$ and ${\mathrm{H}}_2\mathrm{O}$ while the fuel B  produces $\mathrm{C}{\mathrm{O}}_2, \mathrm{C}\mathrm{O}$and $\mathrm{S}{\mathrm{O}}_2$. Give three points of relative advantages and disadvantages of these two fuels.