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understandin, eee ERY AMON OF Waller, access (0 Waler DOdIes, and fall and road Connectivity. Research and conclude by your g, , of how these play a part in the running of a thermal power plant., , Chapter 6—Combustion and Flame [Reteweeei:, , 1. List conditions under which combustion can take place., Ans: Combustion can take place under the following conditions:, * presence of a combustible substance,, * presence of air, and, * achievement of ignition temperature by the substance., 2. Fill in the blanks:, (a) Burning of wood and coal Causes pollution of air., (b) A liquid fuel, used in homes is LPG,, (c) Fuel must be heated to its ignition temperature before it starts burning., (d) Fire produced by oil cannot be controlled by water., , —, , 3. Explain how the use of CNG in automobiles has reduced pollution in our cities., Ans: CNG is preferred over petrol and diesel in automobiles because it is a cleaner fuel and produces lesser amount of air pollutants., , | 1A SM ccc ae