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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.
Give reason:
A burning candle stops burning if covered with a glass tumbler
Give the chemical name of rust.
Fill in the blank
Green plants need ________________to prepare food.
Why do we see the sky and air clear and clean after rainfall?
List uses of oxygen.
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.
______ is the main component of air.
When air is moving with cool and soothing, it is called a cyclone.
State whether the following statement is true or false. If false, correct them.
Plants produce oxygen during the process of making their own food.
