Question

n with a flame C. Write T for true and F for false statemen > and heat on 1. All the combustible substances contain carbon. 2. Most of the fuels are made of hydrocarbons. entral zone of 3. Petrol has higher ignition temperature than coal. 4. Rusting of iron is an example of slow combustion. 5. Fire caused by short circuit can be put out by using carbon tetrachloride. 6. The region of the flame which undergoes the process of incomplete com called non-luminous zone. 7. Environmental pollution is caused due to excessive use of fuels. 8. Global warming is caused due to excessive accumulation of CO, in the atm D. Short type questions for HOME WORK: at. ces.​

Answer 1

Answer:

People generally use wood, cowdung cakes, crop residues, kerosene oil, coke or LPG gas to cook food. For ruining vehicles, we use petrol or diesel oil. In factories, we use coal or fuel oil or natural gas.

The materials, such as wood, coke, LPG (liquid petroleum gas), petrol, diesel, natural gas have one property [n common, i.e., they produce heat on burning which is then put into different uses. Furthermore, some materials on burning produce flame and some do not. For example, a candle or coal gas on burning produces a flame, but not the coal or charcoal. So, let us study the chemical process of burning and the types of flame produced during this process.