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प्रश्न
Define the following:
Combustion.
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उत्तर
Combustion: Combustion also called burning “is burning of substance in the oxygen of air completely producing heat and light is called combustion.”
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संबंधित प्रश्न
Briefly state the importance of Oxygen.
What do you understand by the term polluted air?
Name and briefly explain four ways by which pollution of air is caused by humans.
Name the following:
The active component of air which supports combustion and is used up in burning
Give word equation for the following conversion:
Nitrogen of the air to nitric oxide
Arrange the following statements in correct sequence
- Plants manufacture food by a process called photosynthesis.
- Plants require energy for their growth.
- Plants take in oxygen and release carbon dioxide just as animals.
- Plants take carbon dioxide from the atmosphere, use chlorophyll in the presence of sunlight and prepare food.
- Such oxygen is available to animals and human beings for breathing.
- During this process, oxygen is released by plants.
Nitrogen is _______ than air.
What is the presence of harmful substance in the air called?
Which of the following components of air is present in the largest amount in the atmosphere?
Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.
Oxygen
