Fill in the blacks: 6. A substance that is burnt to obtain heat energy is called a ____7. ___fuels have to be stored in sealed containers under high pressure. 8. A fuel that has a very___ ignition temperature is dangerous to store. 9. Soot is an example of suspended____ 10. Fuels like coal and diesel produce_____ and oxides of____ as undesirable by-products of combustion.

Fill in the blacks: 6. A substance that is burnt to obtain heat ener

1.	Fill in the blacks: 6. A substance that is burnt to obtain heat energy is called a ____7. ___fuels have to be stored in sealed containers under high pressure. 8. A fuel that has a very___ ignition temperature is dangerous to store. 9. Soot is an example of suspended____ 10. Fuels like coal and diesel produce_____ and oxides of____ as undesirable by-products of combustion.
Answer» Solution:(a) BURNING of wood and coal causes pollution of air.(b) A LIQUID FUEL, used in homes is Liquefied PETROLEUM Gas(LPG).(c) Fuel must be heated to its IGNITION temperature before it starts burning.(d) Fire produced by oil cannot be controlled by water