Question

Chemistry Class test 15 Chapter 5 06.01.2021

1. __ substances have low ignition temperature.

2. ____ natural resources have limited availability in nature.

3. ______ of petroleum is done to separate petroleum into useful products.

4. What is combustion?

5. Explain the types of Combustion with examples.

6. What are the conditions necessary for combustion? Explain.

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Answer 1

Answer:

1. Inflammable substances

2.The resources which are present in limited amount are called as exhaustible resources.

3.The process is called fractional distillation.

4. Combustion refers to the process where a substance burns in the presence of Oxygen, giving off heat and light in the process. You might have heard that certain substances are combustible whereas some are non-combustible. Combustible substances are simply those that undergo this process.

5. Combustion is a technical term for burning, which is a chemical process that occurs when a fuel reacts with an oxidant to produce heat. Some common examples of combustion include burning wood to heat a home, the burning of petrol to run a car and the combustion of natural gas to cook on a stovetop.

6. Three things are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel. There must be Fuel to burn. There must be Air to supply oxygen. There must be Heat (ignition temperature) to start and continue the combustion process.

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Answer 2

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