5. Coal is a tough porous black substance which burns without smoke.
7. Petrol is a household fuel used to run generators and trains. I
Answers
Answer:
Coke: contains 98 % carbon. It is porous, tough, black and the purest form of coal. Like charcoal, it Is a good fuel and burns without smoke. It is largely employed as a reducing agent in the extraction of metals from their ores
The generators which use petrol as fuel to run their engine are known as Petrol Generators. Petrol engines are used to convert the chemical energy of petrol into mechanical energy. The mechanical energy from the engine is then used to power a moving component known as a rotor, which in turn generates a moving magnetic field around a stationary component known as stator (a set of conductors wound in coils over an iron ore). This process induces a voltage difference between the winding of the stators, thus producing electricity.