Question

Good fuel is:
(a). Readily available
(b). Cheap
(c). Burn easily in air
(d). All of these

Answer 1

- Hint: The good fuel is the one which can all be used for energy provision for example coal and natural gas. It also produces a large amount of heat on burning without producing a lot of smoke, and is easily available.

Complete step-by-step solution -

We know that fuel is a combustible substance, containing carbon as a main constituent, which on proper burning gives large amounts of heat, which can be used economically for domestic and industrial purposes. Example- Wood, charcoal, coal, kerosene, petrol, diesel, producer gas etc.
The main characteristic of a good fuel are-
>1. It should have moderate ignition temperature and velocity of combustion.
>2. It should have low mixture content and non-combustible matter content.
>3. It should have high calorific value and high efficiency.
>4. It should not pollute the environment and not undergo spontaneous combustion.
>5. It should be easy to handle, store and transport
>6. And more importantly, It should have low cost and low storage cost.
Therefore, the correct option is (d) All of these.

Note: Fuels are classified into two-
>1. Primary Fuels: These are found in nature. e.g.-Wood, Oil, Natural Gas
>2. Secondary or artificial fuels: These are derived from primary fuels. E.g.- Charcoal, Petrol, LPG
Primary and secondary fuels may also be divided into 3 classes namely solid, liquid and gaseous fuels.